REFERENCE MEASURING INSTRUMENT

140 

°C 

%RH 

td 

g/kg 

hPa 

m/s 

m³/h 

ppm 

CO 

ppm 

CO2 

rpm 

mA 

V 

The right probe for every application 

REFERENCE MEASURING INSTRUMENT 

Highly accurate immersion/penetration probes 

with a system accuracy of 0.05 °C in the measuring range from 

0 to 100 °C and a resolution of up to 0.001 °C 

Quick-action surface probes 

to measure surface temperature 

Precision air probes 

to measure air temperature 

Globe thermometer 

to measure radiant heat 

Current/voltage cable (± 1 V, ± 10 V, 20 mA) 

for example, to check stationary transmitters 

CO2 probes 

to determine Indoor Air Quality and monitor the workplace 

Air humidity probes 

Measurements in room/ducts with (precision) humidity probe 

Pressure dew point probes 

to measure pressure dew point to - 60 °C tpd in compressed air systems 

Robust humidity probes 

For equilibrium moisture or duct measurements up to 180 °C 

Equilibrium probes 

To determine equilibrium moisture 

Differential (100 Pa / 10 hPa / 100 hPa) and absolute pressure probes 

For pressure and velocity measurement 

Refrigerant-proof high pressure probes 

For maintenance on refrigeration systems/water measurement 

Straight and Prandtl Pitot tubes to measure velocity in dirty air and 

temperatures up to 600 °C 

12/16/25 mm – Vane probes 

For measurements in ducts, with temperature measurement 

Vane probes 60/100 mm 

For integrating measurements on outlets 

Quick-action hot wire probes 

For low velocities in ducts 

Robust hot bulb probes 

For direction-independent velocity measurement 

Comfort level probes 

For turbulence level measurements to DIN 1946, Part 2 

The reference for HVAC units, testo 400 

Temperature measurement 

The PTB accredited DKD laboratory for temperature guarantees 

reliable readings 

First PTB accredited DKD laboratory for surface temperature, 

developed in cooperation with PTB and the University of Ilmenau 

Patented crossband probe for fast surface measurements 

Custom-designed temperature probes for your application 

System accuracy of testo 400 up to 0.05 °C with precision probe 

0614 0240 

Current and voltage measurement 

Optional connection of external transmitters, such as particle 

counters and pressure transmitters and scaling of input in 

instrument 

CO and CO 2 measurement 

Long-term stable 2 beam procedure to measure reference and 

and measurement duct for C02 Humidity measurement 

The first PTB accredited DKD laboratory for air moisture and 

dew point temperature guarantees reliable readings 

Worldwide patented (capacitive) Testo humidity sensor 

Inter-laboratory tests in national and international institutes 

confirm a sensor accuracy of ±1 %RH 

2 year guaranteed long-term stability of the Testo humidity 

sensor under normal conditions 

Easy calibration or adjustment of humidity probe (on site) with 

defined salt solutions (11.3 %RH, 33 %RH and 75.3 %RH) 

Pressure measurement 

Very high accuracy in lower measuring range (100 Pa) 

from +/- (0.3 Pa + 0.5 % of reading) 

Temperature-compensated pressure measurement 

Velocity measurement 

Efficient readings by one of the first PTB accredited 

laboratories for velocity 

Reference laser Doppler anemometer guarantees 

calibration accuracy from 0.5 % of reading 

Thermal probes for high accuracy up to 

+/- (0.03 m/s + 5% of reading) in measuring range up to 20 m/s 

Density independent measurement from 500 hPa absolute 

pressure 

or up to 350 °C ambient temperature with vanes in measuring 

range from 0.4 m/s to 60 m/s 

Straight Pitot tube with greatly improved accuracy compared to 

Prandtl Pitot tubes on account of Pitot tube factor of 0.67 

Comfort level measurement 

High accuracy to determine degree of turbulence 

from ± (0.03 m/s + 4% of reading)


The reference for HVAC units, testo 400 

Saves or prints at 

the touch of a 

button 

Clear graphics 

display 

3 user defined 

function buttons 

testo 400 

Power connection/ 

quick battery 

recharge 

Attachable printer 

Readings can be printed in the 

matter of seconds on location 

Max/Min 

London 1 

Vol. Mean 

Mean 

10.4 m/s 

m/s 

°C 

2 user defined 

probe sockets 

London 1 

Easy 

operation 

with cursor 

Part no. 

Data 

communication 

with PC, 

barcode pen 

testo 400 

Multi-function measuring instrument, 

incl. battery, Li cell and cal. protocol 

Used for: 

Velocity, volume flow 

Humidity, pressure 

Temperature 

CO , rpm and 

2 

current/velocity 

0563 4001 

305,- 

VAC module 

Turbulence degree 

Data management 

Probes 

500,000 readings 

Reference measurement 

Precision reference class measuring 

instruments have everything the professional 

user needs to complete complicated 

measurement tasks efficiently, accurately and 

conveniently. 

testo 400 includes the parameters 

temperature, CO2 , rpm, current, voltage, 

relative humidity, pressure, velocity and 

volume flow. 

Intelligent electronics ensure the latest 

technology is used thanks to software 

updates. The measuring instrument can 

always keep up with the measurement tasks at 

hand thanks to upgrades. 

Upgradable and teachable, highly reliable 

and of the highest quality - they are the 

properties which guarantee that the customer 

is equipped for the future. 

Useful instrument functions: 

System accuracy up to 0.05 °C and up to a 

resolution of 0.001 °C 

All functions of testo 650 and testo 950 

Input of cross-sections to volume flow 

calculation 

Absolute pressure compensation in thermal 

probes 

Density calculation for velocity 

measurement with reference to 

temperature, humidity and absolute 

pressure 

Turbulence degree meas. to DIN EN 27726, 

DIN 1946 Part 2, ISO 

Assessment of volume flow measurements 

with calculation of total inaccuracy of 

measurement in accordance with EN 12599 

with VAC module (optional) 

141 

°C 

%RH 

td 

g/kg 

hPa 

m/s 

m³/h 

ppm 

CO 

ppm 

CO2 

rpm 

mA 

V

142 

°C 

%RH 

td 

g/kg 

hPa 

m/s 

m³/h 

ppm 

CO 

ppm 

CO2 

rpm 

mA 

V 

testo 400 

Location 

m 3 /h 

m/s 

Vol. Max/Min Mean 

°C 


The reference testo 400... 

. . . guarantees quality 

Proof of temperature 

Guaranteeing quality usually involves keeping to a certain temperature. 

This ranges in the food industry from frozen food temperatures to 

component temperatures in the electronics branch. Easy documentation 

and filing of this measurement data is possible with testo 400. 

Remaining moisture/high-level moisture 

Highly accurate and efficient measurement of humidity and 

temperature is required in many industrial processes to guarantee 

continuous quality. testo 400 calculates all the physical parameters 

in the Mollier diagram. 

Production and storage conditions 

Sensitive products require the right air conditions during production 

and storage. The testo 400 multi-function measuring instrument 

includes all the functions needed to analyse air with reference to 

temperature, humidity and air flow.


The reference testo 400... 

. . . sets standards . . . documents processes 

Precision temperature Production unit 

Testo 400, when used together with the 0614 0240 precision probe, 

has a system accuracy of 0.05 °C in the measurement range from 0 

to 100 °C and a resolution of up to 0.001 °C. This high accuracy 

level makes testo 400 ideal as a working standard. 

Reference humidity Compressed air unit 

testo 400 is setting new standards in accuracy and long-term stability 

with its worldwide inter-laboratory tests carried out in leading 

international institutes enabling accurate monitoring of air humidity 

fluctuations of ± 1 %RH. 

Comfort level Air conditioning systems 

Top performance requires good ambient conditions. testo 400 offers 

standard assessment of temperature, humidity, velocity and CO 2 for 

employees, employers and companies such as air conditioning and 

heating fitters or planning offices. 

Products and systems are subjected to different temperatures during 

a production process. testo 400 has extensive monitoring options, 

for example, a measurement program is started when a temperature 

value is exceeded. 

Extensive economic damage, depending on the application, could 

be caused by uncontrolled moisture ingress in the compressed air 

system. It is possible to measure and document readings over a 

longer period of time using testo 400. 

If the volume flow is too low in VAC systems, there will be 

insufficient fresh air. If the volume flow is too high, this will lead to 

non-energy optimised operation. testo 400 offers efficient and 

standard measurement of volume flow. 

143 

°C 

%RH 

td 

g/kg 

hPa 

m/s 

m³/h 

ppm 

CO 

ppm 

CO2 

rpm 

mA 

V

144 

°C 

%RH 

td 

g/kg 

hPa 

m/s 

m³/h 

ppm 

CO 

ppm 

CO2 

rpm 

mA 

V 

Structuring measurement data: 

Readings can be saved at individual locations 

- with guarantee of refinding. 

The “tree structure” - folders, sub-folders and measurement protocols - guarantees 

an uncomplicated view. 

Practical additional information such as measurement information or required value input 

can be saved with the location. 

The locations can be selected via barcode labels using the pen. 

It is easy to draw an effective tour plan using the locations list. 

Long-term control made easy: 

User-friendly data logging, not only for spot checks 

The beginning of the measurement can be... 

- determined manually each time. 

- activated if a user defined limit value is exceeded. 

- set according to date/time. 

The measurement is completed when... 

- the predefined number of readings is reached. 

- date/time is reached. 

- the memory is full. 

- ended manually. 

Non-stop measurement via wrap-around memory... 

- deletes the oldest respective value. 

- is deactivated manually. 

Documentation on-site: 

The individual measurement protocol can be either saved or deleted following analysis. 

The printer immediately supplies the documentation required. 

The attachable comfort printer also offers graphical analysis options. 

Thermal paper for long-term legible measurement data documentation 

of up to 10 years. 


Measurement data with the measuring instrument: 

Structure - Measure - Printout on-site 

1 testo 400 

/ 

.Week 35/02 

+ HALL A1 

+ HALL A2 

+ HALL C3 

Page- Change Page+ 

Program Start 

Speicher 

Fühler 

Read out 

Spezial 

Progr. Start 

Gerät 

Keylock Meas.rate 

Drucken 

Mode End 

Language 

Save 

Delete 

Save Delete 

0008 Mean 

0.22 m/s 

965.00 m3/h 

27.70 °C 

Continue New End 

2 testo 400 

/ 

..HALL A1 

WINDOW L1 

WINDOW L2 

WINDOW L3 

WINDOW R1 

WINDOW R2 

Door 1 

Door 2 

Page- Change Page+ 

Speicher 

Fühler 

Read out 

Spezial 

Progr. Start 

Gerät 

Keylock Messrate 

Drucken 

Modeand Falls Endeshort 

Exceeds 

Languae 

Speichern 

Manual Löschen 

Date/Time 

16.10.02 15:29:32 

Mean 

Multi-point 

WINDOW 1 

-- m3/h 

870 1070 

02.01.02 23:26:38 

16.10.02 15:29:32 

Time axis: 

0 sec / Div. 

Mean: 

- - - - - - - - - - - 

1 0.22 m/s 

2 965.00 m3/h 

3 27.70 °C 

- - - - - - - - - - - 

Info: 

Req. 1000 m3/h 

16.10.02 

15:29:32 

16.10.02 15:29:32 

Mean 

Multi-point 

WINDOW 1 

1 m/s2 m3/h 3 °C 

- - - - - - - - - - - 

01 0.23 1010 27.7 

02 0.22 960 27.7 

03 0.20 880 27.7 

04 0.21 920 27.7 

05 0.20 870 27.7 

06 0.24 1040 27.7 

07 0.25 1070 27.7 

08 0.23 970 27.7 

Mean: 

- - - - - - - - - - - 

1 0.22 m/s 

2 965.00 m3/h 

3 27.70 °C 

- - - - - - - - - - - 

Info: 

Req. value 1000 m3/h 

16.10.02 

15:29:32


Measurements with ComSoft 3 software: 

Preparation - Analysis - Filing - Documentation 

Easy reading management: 

Preparation of the measurement: 

- The measurement program is determined and loaded into instrument 

- Tour plan is drawn up based on locations and 

is loaded into instrument. 

The measuring instrument is downloaded once measuring is complete: 

- The saved protocols are conveniently filed via the software using 

"Drag & Drop" or are analysed in Data. 

The readings are determined using the measuring instrument and can also be displayed 

online using the software. 

Comprehensive analysis, easy filing: 

Analysis: 

- with calculation functions 

- with crosshairs 

- with mean calculation 

- with calculation of standard deviation 

- taking all conventional refrigerants into consideration (refrigeration module, optional) 

Display: 

- as table or as graphic 

- as digit field or as histogram 

- with analog display 

- Measurement channels can be activated or deactivated at the touch of a button 

Documenting: 

- Data is transferred to Excel table using “Copy and Paste”. 

Individual configuration options: 

Your company logo can be included on the printouts. 

Functions can be selected from the function list and the finished profile can be 

saved. 

The online interface is available for LabVIEW software. 

Menu can be individually tailored to your needs. 

145 

°C 

%RH 

td 

g/kg 

hPa 

m/s 

m³/h 

ppm 

CO 

ppm 

CO2 

rpm 

mA 

V

146 

°C 

%RH 

td 

g/kg 

hPa 

m/s 

m³/h 

ppm 

CO 

ppm 

CO2 

rpm 

mA 

V 

testo 400, multi-function measuring instrument, 

incl. battery, Li cell and calibration protocol 

Part no. 

0563 4001 

Attachable printer (securely attached) with 1 roll of 

thermal paper and batteries 

Quickly prints readings on location 

Part no. 0554 0570 

Measuring instrument 

testo 400, multi-function measuring instrument, incl. battery, Li cell and 

calibration protocol 

2 channel multi-function measuring instrument 

Accessories for measuring instrument 

Memory upgrade to 500,000 readings 

Upgrades memory capacity (via service) 

Rechargeable battery set for instrument (4 rechargeables 2.4V/700mAh) 

Selected for quick recharging in instrument 

Mains unit 230 V/ 8 V/ 1 A, for instrument (European plug) 

For mains operation and battery recharging 

Car charging adapter, ready to measure following recharging in car 

Battery is recharged while travelling in car 

Spare Li cell to save RAM data 

When changing battery or rechargeable battery 

Printer and accessories 

Attachable printer (securely attached) with 1 roll of thermal paper and batteries 

Testo printer with 1 roll of thermal paper and 4 AA size batteries 

Prints readings on location 

testo 575 fast printer, incl. 1 roll of thermal paper and batteries 

Infrared thermal line printer with graph function 

Recharger for printer (with 4 standard rech. batt.) 

Rechargeable batteries are recharged externally 

Spare thermal paper for printer (6 rolls) 

Spare thermal paper for printer (6 rolls) 

Measurement data documentation legible for up to 10 years 

Barcode pen to read in measurement locations 

Quick and accurate allocation of reading to 

location 

Part no. 0554 0460 

Label thermal paper (Testo patent) for testo 575 printer (6 rolls), can be applied 

directly 

Testo printer with 1 roll of thermal paper and 4 AA 

size batteries 

Part no. 0554 0545 

testo 575 fast printer, incl. 1 roll of thermal 

paper and batteries 

Part no. 0554 1775 

Part no. 

0563 4001 

Part no. 

0554 9481 

0554 0196 

0554 1084 

0554 0424 

0515 0028 

Part no. 

0554 0570 

0554 0545 

0554 1775 

0554 0110 

0554 0569 

0554 0568 

0554 0561 


ComSoft 3 - Professional with data management 

Incl. database, analysis and graphics function, data 

analysis, trend curve 

Part no. 0554 0830 

testovent 410, volume flow funnel, Ø 340mm/330 

x 330mm, incl. case 

Part no. 0554 0410 

testovent 415, volume flow funnel, Ø 

210mm/190x190mm, incl. case 

Part no. 0554 0415 

Softcase for instrument and printer 

SoftCase (protects instrument from impact) with carrier strap, magnetic holder 

and probe holder 

SoftCase for attachable printer (protects printer from dirt/impact) 

Barcode and accessories 

Barcode pen to read in measurement locations 

Quick and accurate allocation of reading to location 

Barcode labels, self-adhesive (1200 off) 

Location marked with barcode, printed using software 

Adhesive pockets (50 off) for printout, paper barcode labels... 

Software and accessories 


Incl. database, analysis and graphics function, data analysis, trend curve 

RS232 cable 

Connects instrument to PC (1.8 m) for data transfer 

Electrical isolation for RS232 (connects measuring instrument to PC) 

VAC module 



VAC module upgrade 

Volume flow calculation in ducts with error calculation function in instrument 

VAC module upgrade, PC software, (for ComSoft 3 software) 

Printout of standard measurement protocols 

Refrigeration module 

System case 

Transport case (plastic) for measuring instrument, probes 

System case (plastic) for measuring instrument, probes and accessories 

Probes in lid make it easy to find parts in case 

System case (aluminium) for measuring instrument, probes and accessories 


Ordering data 

SoftCase (protects instrument from impact) with 

carrier strap, magnetic holder and probe holder 

Part no. 0516 0401 

SoftCase for attachable printer (protects printer 

from dirt/impact) 

Part no. 0516 0411 

System case (plastic) 

Part no. 0516 0400 

System case (aluminium) 

Part no. 0516 0410 

"Refrigeration technology" update with saved curves of all usual refrigerants 

Part no. 

0516 0401 

0516 0411 

Part no. 

0554 0460 

0554 0411 

0554 0116 

Part no. 

0554 0830 

0409 0178 

0554 0006 

Part no. 

0554 9481 

0450 4010 

0554 4030 

Part no. 

0554 4035 

Part no. 

0516 0300 

0516 0400 

0516 0410


Calibration certificates 

Calibration certificates/Temperature 

Part no. 

ISO calibration certificate/Temperature 

0520 0001 

For air/immersion probes, calibration points -18°C; 0°C; +60°C 


0520 0021 

Measuring instruments with air/immersion probe; calibration points 0°C; +150°C; +300°C 


0520 0071 

Thermometers with surface probe; calibration points +60°C; +120°C; +180°C 

DKD calibration certificate/Temperature 

0520 0211 

Meas. instr. with air/immersion probe; calibration points -20°C; 0°C; +60°C 

DKD calibration certificate/Temperature 

0520 0271 

Contact surface temperature probes; calibration points +100°C; +200°C; +300°C 

Calibration certificates/Humidity 

Part no. 

ISO calibration certificate/Humidity 

0520 0106 

Calibration points freely selectable from 5 to 95 %RH 

+15 to +35 °C (max DP +70 °C/min DP -30 °C) 

-18 to +80 °C 


0520 0006 

Electronic hygrometers; calibration points 11.3%RH and 75.3%RH at +25°C 


0520 0116 

Pressure dew point measuring instruments; calibration points freely selectable 

-40 to 0 °C at 6 bar 


0520 0013 

Saturated saline solutions: calibration point 11.3%RH 


0520 0083 

Saturated saline solutions, calibration point 75.3%RH 

DKD calibration certificate/Humidity 

0520 0206 

Electronic hygrometers; calibration points 11.3%RH and 75.3%RH at +25°C 


0520 0216 

Calibration points freely selectable from 5 to 95%RH 

+25°C 

-18 to +70°C 


0520 0213 

Saturated saline solutions; calibration point 11.3%RH 


0520 0283 

Saturated saline solutions; calibration point 75.3%RH 

Calibration certificates/Pressure 

Part no. 

ISO calibration certificate/Pressure 

0520 0115 

Absolute pressure; 5 pt. distributed over the whole measurement range 

ISO calibration certificate/Pressure 

0520 0005 

Differential pressure; 5 points distributed over meas. range (-1 to 250 bar) 

DKD calibration certificate/Pressure 

0520 0225 

Differential and positive pressure; 6 measuring points distributed over meas. range (> 0.6% of fsv) 


0520 0212 

Absolute pressure; 11 measuring points distributed over meas. range (0.1 to 0.6% of fsv) 


0520 0215 

Differential and positive pressure; 11 measuring points distributed over the instrument measuring range 

Calibration certificates/Velocity 

ISO calibration certificate/Velocity 

All velocity probes, calibration points selectable from 0.3 to 50 m/s at +25°C 


Hot wire, vane anemometer, Pitot tube; calibration points 1; 2; 5; 10 m/s 


Hot wire, vane anemometer, Pitot tube; calibration points 5; 10; 15; 20 m/s 


Hot wire, vane anemometer; calibration points 0.5; 0.8; 1; 1.5 m/s 

DKD calibration certificate/Velocity 

Hot wire, vane anemometer; calibration points 0.5; 1; 2; 5; 10 m/s 


Hot wire, vane anemometer, Pitot tube; calibration points 2; 5; 10; 15; 20 m/s 


Hot wire anemometer; calibration points 0.1; 0.2; 0.5; 0.8; 1 m/s 

Part no. 

0520 0104 

0520 0004 

0520 0034 

0520 0024 

0520 0244 

0520 0204 

0520 0224 

147 

°C 

%RH 

td 

g/kg 

hPa 

m/s 

m³/h 

ppm 

CO 

ppm 

CO2 

rpm 

mA 

V

148 

°C 

%RH 

td 

g/kg 

hPa 

m/s 

m³/h 

ppm 

CO 

ppm 

CO2 

rpm 

mA 

V 


Suitable probes at a glance 

Air probes Illustration Meas. range Accuracy t99 Conn. Part no. 

NTC probes 

Highly accurate air probe for air and gas 

temperature measurements with bare, 

mechanically protected sensor 

Pt100 probes 

Standard air probe 

Precision air probe 

NiCr-Ni probes 

Super quick-action immersion/penetration probe 

for measurements in gases and liquids with a 

low-mass tip 

150 mm 

Ø 9 mm 

150 mm 

Ø 3 mm 

150 mm 

Ø 3 mm 

Thermocouple, made of fibre-glass insulated 

2000 mm 

thermal pipes, pack of 5 

Insulation: twin conductor, flat, oval, opposed and covered with fibre-glass, both conductors are wrapped together with fibre-glass and 

soaked with lacquer, please order adapter 0600 1693 

Adapter to connect NiCr-Ni thermocouples and 

probes with open wire ends 

Ø 9 mm 

Ø 9 mm 

-40... +125 °C To UNI curve 60 s Fixed cable 0610 9714 

-200... +600 °C Class A 75 s 

-100... +400 °C 

1/10 Class B (0 to 

100°C) 1/5 Class B 

(rem. range) to EN 

60751 

75 s 

Plug-in head, 

connection cable 0430 

0143 or 0430 0145 

required 

Plug-in head, 


0143 or 0430 0145 

required 

0604 9773 

0628 0017 

150 mm 

20 mm -200... +600 °C Class 1 1 s Plug-in head, 


0604 9794 

Ø 1.4 mm Ø 0.5 mm 

0143 or 0430 0145 

required 

0614 9794 * 

Surface probes Illustration Meas. range Accuracy t99 Conn. Part no. 


Quick-action surface probe with sprung 

thermocouple strip, measuring range short-term 

to +500°C 

Super quick-action surface probe, probe tip at 

90° angle, with sprung thermocouple strip 

Robust surface probe 

Robust surface probe, at 90° angle, suitable for 

inaccessible places 

Robust surface probe with sprung thermocouple 

strip for high temperature range up to +700°C 

Roller surface probe for measurements on rollers 

and rotating drums, max. circumferential velocity 

18 to 400m/min 

Magnetic probe, adhesive power approx. 20 N, 

with magnets, for measurements on metal 

surfaces 

Magnetic probe, adhesive power approx. 10 N, 

with magnets, for higher temperatures, measures 

on metal surfaces 

Miniature surface probe for measurements on 

electronic components, small motors... 

Adhesive thermocouple, pack of 2, carrier material: 

aluminium foil 

Is fixed at the measuring point using conventional adhesives or silicone heat paste 0554 0004 

Adapter to connect NiCr-Ni thermocouples and 

probes with open wire ends 

Pt100 probes 

Robust surface probe 

Infrared probes 

Infrared surface probe for fast non-contact temperature 

measurement on live, inaccessible and rotating parts 

Accessories 

Silicone heat paste (14g), Tmax = +260°C 

Improves heat transfer in surface probes 

35 mm 

75 mm 

150 mm 

50 mm 

Ø 10 mm 

100 mm Ø 10 mm 

150 mm 

Ø 4 mm 

130 mm 

Ø 4 mm 

200 mm 

274 mm 

270 mm 

Ø 5 mm 

150 mm 

Ø 4 mm 

Ø 33 mm 

Ø 20 mm 

Ø 21 mm 

Ø 0.8 mm 

Ø 4 mm 

Ø 4 mm 

Ø 15 mm 

Diameter extension 2 x 0.2 

mm, 0.1 mm thick 

Ø 9 mm 

-200... +400 °C Class 1 5 s Please order adapter 

0600 1693 

-200... +300 °C Class 2 3 s Plug-in head, 


0143 or 0430 0145 

required 



0143 or 0430 0145 

required 

-200... +600 °C Class 1 25 s 

Plug-in head, 


0143 or 0430 0145 

required 



0143 or 0430 0145 

required 

-200... +700 °C Class 2 3 s Fixed cable, 

coiled 

-50... +240 °C Class 2 Fixed cable, 

coiled 

0644 1109 

Fixed cable 0600 1693 

0604 0194 

0604 0994 

0604 9993 

0604 9893 

* 

0614 0194 * 

0614 9993 

0614 9893 

0600 0394 

0600 5093 

-50... +170 °C Class 2 Fixed cable 0600 4793 

-50... +400 °C Class 2 Fixed cable 0600 4893 

-200... +400 °C Class 2 3 s Fixed cable 0600 1494 

-200... +200 °C Class 1 Please order adapter 

0600 1693 

-50... +400 °C Class B 40 s 

-18... +260 °C ±2% of mv (+100.1... +260 °C) 

±2 °C (-18... +100 °C) 


Plug-in head, 


0143 or 0430 0145 

required 

2 s Fixed cable, 

coiled 

0644 1607 

0604 9973 

0628 0018 

0600 0750 

0554 0004 

*with EEPROM: Precision adjustment for each probe at a measuring point; measuring range limits are saved in probe; t95 extrapolation; surface allowance in surface probe can be adapted to measuring task 

* 

* 

*



Pipe wrap probes Illustration Meas. range Accuracy t99 Conn. Part no. 

NTC probes 

Pipe wrap probe for pipes with diameter of up to 

2", for flow/return temperature measurement in 

hydronic systems 

Spare meas. head for pipe wrap probe 

Pt100 probes 

Velcro probe for pipes with diameter of max. 100 

mm 

Immers./penetr. probes Illustration Meas. range Accuracy t99 Conn. Part no. 


Fast response immersion/penetration probe 


for measurements in liquids 


for high temperatures 


for measurements in gases and liquids with a 

low-mass tip 

Robust immersion/penetration probe made of 

V4A stainless steel, waterproof and oven-proof, 

e.g. for the food sector 

Smelting probe for measurements in non-ferrous 

melting baths, with exchangeable measuring tips 

Spare measuring tip for smelting probe 

Pt100 probes 

Standard immersion/penetration probe 

Standard immersion/penetration probe 

Highly accurate immersion/penetration probe 

incl. certificate 

Highly accurate immersion/penetration probe 

Flexible precision immersion probe, cable heatproof 

up to +300°C 

Robust immersion/penetration probe with 

sharpened measuring tip, waterproof and ovenproof 

1100 mm 

Ø 6.5 mm 

150 mm 



0604 0293 

Ø 3 mm 

0143 or 0430 0145 

required 

0614 0293 * 

150 mm 



0604 0493 

Ø 1.5 mm 

0143 or 0430 0145 

required 

0614 0493 * 

470 mm 



0604 0593 

Ø 1.5 mm 

0143 or 0430 0145 

required 

0614 0593 * 

150 mm 

20 mm -200... +600 °C Class 1 1 s Plug-in head, 


0604 9794 

Ø 1.4 mm Ø 0.5 mm 

0143 or 0430 0145 

required 

0614 9794 * 

150 mm 

Ø 3.5 mm 

Ø 6.5 mm 

200 mm Stainless steel 

Ø 3 mm 

200 mm 

Ø 3 mm 

295 mm 

Ø 4 mm 

200 mm 

Ø 3 mm 

1000 mm 

Ø 3.5 mm 

150 mm 

Ø 3.5 mm 

Nickel 

Stainless steel 

50 mm 

Ø 6 mm 

Ø 3 mm 

Ø 3 mm 



-200... +1250 °C Class 1 60 s 0363 1712 

-200... +400 °C Class A 20 s 

-200... +600 °C Class A 20 s 

-40... +300 °C 

±0.05 °C (+0.01... +100 °C) 

±(0.05 °C ±0.05% of mv) 

(-40... 0 °C) 

±(0.05 °C ±0.05% of mv) 

(+100.01... +300 °C) 

-100... +400 °C 1/10 Class B (0 to 

100°C) 1/5 Class B 


60751 

-100... +265 °C 1/10 Class B (0 to 

100°C) 1/5 Class B 


60751 

60 s 

30 s 

80 s 

Plug-in head, 


0143 or 0430 0145 

required 

Plug-in head, 


0143 or 0430 0145 

required 

Plug-in head, 


0143 or 0430 0145 

required 

Plug-in head, 


0143 or 0430 0145 

required 

Plug-in head, 


0143 or 0430 0145 

required 

0604 0273 

0604 0274 

0614 0240 

0628 0015 

0628 0016 

-200... +400 °C Class A 30 s Fixed cable 0604 2573 

Plug-in measuring tips Illustration Meas. range Accuracy t99 Conn. Part no. 

Plug-in measuring tip, 750mm long, flexible, for 

high temperatures, outer casing: stainless steel 

1.4541 

Plug-in measuring tip, 1200 mm long, flexible, 

for high temperatures, outer casing: stainless 

steel 1.4541 


high temperatures, outer casing: Inconel 2.4816 


high temperatures, outer casing: Inconel 2.4816 

Handle for plug-in measuring tip 

35 mm 

15 mm 

750 mm 

Ø 3 mm 

1200 mm 

Ø 3 mm 

550 mm 

Ø 3 mm 

1030 mm 

Ø 3 mm 


-60... +130 °C Class 2 5 s 0602 0092 

-50... +150 °C Class B 40 s Fixed cable 0628 0019 

-200... +900 °C Class 1 4 s Please order handle 

with Part no. 0600 5593 







0600 5393 

0600 5493 

0600 5793 

0600 5893 

0600 5593 

*with EEPROM: Precision adjustment for each probe at a measuring point; measuring range limits are saved in probe; t95 extrapolation; surface allowance in surface probe can be adapted to measuring task 

* 

* 

149 

°C 

%RH 

td 

g/kg 

hPa 

m/s 

m³/h 

ppm 

CO 

ppm 

CO2 

rpm 

mA 

V

150 

°C 

%RH 

td 

g/kg 

hPa 

m/s 

m³/h 

ppm 

CO 

ppm 

CO2 

rpm 

mA 

V 

Current/voltage cable (±1 V, ±10 V, 20 mA) 

Cable, 1.5 m long, connects probe with plug-in head to meas. instrument 

Cable, 5 m long, connects probe with plug-in head to measuring instrument 

Extension cable, 5 m long, between plug-in head cable and instrument 

0430 0143 

0430 0145 

0409 0063 



Other temperature probes Illustration Meas. range Accuracy Conn. Part no. 

Globe thermometer to measure radiant heat Ø 150 mm 

More probes Illustration 

Meas. range Accuracy Conn. Part no. 

CO probe to measure CO level in ambient air 

CO2 probe measures indoor air quality and monitors the 

workplace. With plug-in head, connection cable 0430 

0143 or 0430 0145 required 

Mechanical rpm probe with plug-in head 

Included 

2 probe tips Ø 8 and Ø 12 mm 

1 hollow cone Ø 8 mm 

1 surface speed disc Ø 19 mm to measure rotational speed: rpm = 

rotational speed in mm/s 

190 mm 

0... +500 ppm CO ±5% of mv (+100.1... +500 ppm CO) 

±5 ppm CO (0... +100 ppm CO) 

0... +1 Vol. % CO2 

0... +10000 ppm 

CO2 

±(50 ppm CO2 ±2% of mv) (0... +5000 ppm 

CO2) 

±(100 ppm CO2 ±3% of mv) (+5001... 

+10000 ppm CO2) 

+20... +20000 rpm ± 1 digit Plug-in head, 


0143 or 0430 0145 

required 

0640 0340 

0... +1000 mV ±1 mV (0... +1000 mV) 0554 0007 

0... +10 V 

±0.01 V (0... +10 V) 

0... +20 mA ±0.04 mA (0... +20 mA) 

Accessories for temperature probes Part no. Accessories for temperature probes 

PUR coating material 



Accuracy corresponds to 

ISO 7243, ISO 7726, DIN 

EN 27726, DIN 33403 

requirements 

Ø 25 mm 

Selecting the right temperature sensor 

Measuring range 

°C 

+1200 –– 

+1100 –– 

+1000 –– 

+900 –– 

+800 –– 

+700 –– 

+600 –– 

+500 –– 

+400 –– 

+300 –– 

+200 –– 

+100 –– 

0 –– 

-100 –– 

-200 –– 

NTC 

Pt100 

Type K 

Type J 

Type T 

Thermocouples 

0... +120 °C 

±0.5 °C (0... +49.9 °C) 

±1 °C (+50... +120 °C) 

Telescopic handle, max. 1 m, for probe with plug-in head 

Cable: 2.5 m long, PUR coating material 


Plug-in head, 


0143 or 0430 0145 

required 

Glass pipe for immersion/penetration probe to protect from corrosive agents 

For probes with Part nos. 0604 0273 and 0628 0015 

Accuracy 

Accuracy data 

Sensor Temp. 

range 

Thermocouple 

Type K (NiCr-Ni) 

-40...+1200 °C 

-40...+1000 °C 

-40...+350 °C 

-40...+750 °C 

-100...+200 °C 

-200...+600 °C 

-50...-25,1 °C 

-25...+74,9 °C 

+75...+150 °C 

-30...-20,1 °C 

-20...0 °C 

+0,1...+75 °C 

+75,1...+275 °C 


0632 1240 

Part no. 

0430 0144 

0554 7072 

Select the sensor with the accuracy required for your application from the diagram or table. 

Type T 

Type J 

Pt100 

NTC 

(Standard) 

NTC 

(High temp.) 

Data for thermocouples to EN 

60584-1 (formerly IEC 584-1). Two 

values are given. One fixed value in 

°C and a formula. 

Class Maximum tolerances 

Fixed value Referred to temperature 

2 

1 

1 

1 

B 

A 

– 

– 

– °C 

±2,5 °C 

±1,5 °C 

±0,5 °C 

±1,5 °C 

± (0,3 + 0,005 ItI) 

± (0,15 + 0,002 ItI) 

±0.4 °C 

±0.2 °C 

±0.5 % of reading 

The larger value always applies. 

Data for Pt100 to EN 60751 

(formerly IEC 751). 

±0,0075 x ltl 

±0,004 x ltl 

±0,001 x ltl 

±0,004 x ltl 

±1 °C 

±0.6 °C 

±0.5 °C 

±0.5 °C ±0.5 % of reading 

t=Measuring temperature 

There is no standardization for NTC 

sensors.



Probes Illustration Meas. range Accuracy t90 Conn. Part no. 

Air probes 

Standard indoor air quality probe up to +70°C 

Duct humidity/temperature probe, can be 

connected to telescopic handle 

Telescopic handle 0430 9715, see Ordering data for Accessories 

Thin humidity probe incl. 4 attachable protection caps for 

ambient air measurements, measurements in exhaust air 

ducts and equilibrium moisture measurements 

Highly accurate reference humidity/temp. probe 

incl. calibration certificate 

Humidity/temperature probe 

Process humidity 

Standard pressure dew point probe for 

measurements in compressed air systems 

Precision pressure dew point probe for 

measurements in compressed air systems incl. 

cert. with test point -40°C tpd 

High humidity level probe with heated sensor 

element, no condensation on sensor 

Robust high temperature/humidity probe up to 

+180°C 

Flexible humidity probe (does not retain shape) 

for measurements in inaccessible places 

Material and equilibrium moisture 

Flexible humidity probe with mini module for 

meas. e.g. on material testing rigs, module cable 

length 1500mm, probe tip 50x19x7mm 

Sword probe for measuring humidity and 

temperature in stacked material 

Robust humidity probe e.g. for measuring 

equilibrium moisture or for measurements in 

exhaust ducts to +120°C 

Material moisture probe 

Material/building moisture cable 

aw value 

aw value set: pressure-tight precision humidity 

probe with certificate, measurement chamber and 

5 sample bowls (plastic) 

Pressure probe, 100 hPa, measures differential 

pressure 

Pressure probe, 2000 hPa, measures absolute 

pressure 

Low pressure probe, refrigerant-proof stainless 

steel, without cable 

300 mm 

300 mm 

Ø 21 mm 

Ø 21 mm 

180 mm 

Ø 12 mm 

300 mm 

Ø 12 mm 

300 mm 

Ø 12 mm 

Ø 12 mm 

1500 mm 100 mm 

Ø 12 mm 

320 mm 

Ø 18 mm 

300 mm 

Ø 12 mm 

0... +100 %RH ±1 %RH (+10... +90 %RH) * ±0.4 °C (-10... +50 °C) 

-20... +70 °C 

±2 %RH (0... +9.9 %RH) ±0.5 °C (-20... -10.1 °C) 

±2 %RH (+90.1... +100 %RH) ±0.5 °C (+50.1... +70 °C) 

-20... +70 °C 

0... +100 %RH 

-30... +50 °C tpd 

0... +100 %RH 

-60... +50 °C tpd 

0... +100 %RH 

-20... +85 °C 

0... +100 %RH 

-20... +180 °C 

0... +100 %RH 

-20... +180 °C 

0... +100 %RH 

-20... +125 °C 

0... +100 %RH 

-20... +70 °C 

0... +100 %RH 

-20... +120 °C 

±2.5 %RH (0... +100 

%RH) 

±2 %RH (+2... +98 

%RH) 

±2 %RH (+2... +98 

%RH) 

±2 %RH (+2... +98 

%RH) 

±2 %RH (+2... +98 

%RH) 

±2 %RH (+2... +98 

%RH) 

±0.9 °C tpd (+0.1... +50 °C tpd) 

±1 °C tpd (-4.9... 0 °C tpd) 

±2 °C tpd (-9.9... -5 °C tpd) 

±3 °C tpd (-19.9... -10 °C tpd) 

±4 °C tpd (-30... -20 °C tpd) 

±0.8 °C tpd (-4.9... +50 °C tpd) 

±1 °C tpd (-9.9... -5 °C tpd) 

±2 °C tpd (-19.9... -10 °C tpd) 

±3 °C tpd (-29.9... -20 °C tpd) 

±4 °C tpd (-40... -30 °C tpd) 

±0.4 °C (-10... +50 °C) 

±0.5 °C (-20... -10.1 °C) 

±0.5 °C (+50.1... +85 °C) 

±0.4 °C (+0.1... +50 °C) 

±0.5 °C (-20... 0 °C) 

±0.5 °C (+50.1... +180 °C) 

±0.4 °C (+0.1... +50 °C) 

±0.5 °C (-20... 0 °C) 

±0.5 °C (+50.1... +180 °C) 

±0.4 °C (-10... +50 °C) 

±0.5 °C (-20... -10.1 °C) 

±0.5 °C (+50.1... +125 °C) 

12 s Plug-in head, 0636 9741 


0143 or 0430 0145 

required 

300 s Plug-in head, 0636 9840 


0143 or 0430 0145 

required 

300 s Plug-in head, 0636 9841 


0143 or 0430 0145 

required 

30 s Plug-in head, 0636 2142 


0143 or 0430 0145 

required 

30 s Plug-in head, 0628 0021 


0143 or 0430 0145 

required 

30 s Plug-in head, 0628 0022 


0143 or 0430 0145 

required 

20 s Plug-in head, 0628 0013 


0143 or 0430 0145 

required 

±0.4 °C (-10... +50 °C) 

±0.5 °C (-20... -10.1 °C) 

±0.5 °C (+50.1... +70 °C) 

12 s Plug-in head, 0636 0340 


0143 or 0430 0145 

required 

±0.4 °C (-10... +50 °C) 30 s 

±0.5 °C (-20... -10.1 °C) 

±0.5 °C (+50.1... +120 °C) 

Plug-in head, 0636 2140 


0143 or 0430 0145 

required 

1500 mm Free scaling, reference 

measurement, no water 

level 

Screw-in 

thread 7/16" 

UNF 

0 to 100 k Ohm = 

100 to 0 % 

±0.4 °C (+0.1... +50 °C) 

±0.5 °C (-20... 0 °C) 

±0.5 °C (+50.1... +70 °C) 

Plug-in head, 0636 9742 


0143 or 0430 0145 

required 

Displayed values in 

instrument mean: 100 to 66 

wet; 0 to 1 very dry 

0636 0365 

0636 0565 

0... +1 aW ±0.01 aW (+0.1... +0.9 ±0.4 °C (-10... +50 °C) Reproducibility of 0628 0024 

0... +100 %RH 

-20... +70 °C 

aW) 

±0.02 aW (+0.9... +1 aW) 

±0.5 °C (-20... -10.1 °C) 

±0.5 °C (+50.1... +70 °C) 

aw value ±0.003 

* in the temperature range from +10°C to +30°C 

Description Illustration Probe type Meas. range Accuracy Conn. Part no. 

Precision pressure probe, 100 Pa, measures 

differential pressure 


pressure 

High pressure probe, refrigerant-proof stainless 

steel, up to 30 bar, without cable 

High press. probe, refrigerant-proof st. steel, up 

to 40 bar, w/o cable 

250 mm 

Ø 4 mm 

Screw-in 

thread 7/16" 

UNF 

Screw-in 

thread 7/16" 

UNF 

0... +100 %RH 

-20... +70 °C 

±2 %RH (+2... +98 

%RH) 

±0.4 °C (-10... +50 °C) 

±0.5 °C (-20... -10.1 °C) 

±0.5 °C (+50.1... +70 °C) 

12 s Plug-in head, 0636 9740 


0143 or 0430 0145 

required 

0... +100 %RH ±2 %RH (+2... +98 ±0.4 °C (-10... +50 °C) 12 s Fixed cable 0636 9715 

-20... +70 °C 

%RH) 

±0.5 °C (-20... -10.1 °C) 

±0.5 °C (+50.1... +70 °C) 

0... +100 %RH 

-20... +70 °C 

±2 %RH (+2... +98 

%RH) 

±0.4 °C (-10... +50 °C) 

±0.5 °C (-20... -10.1 °C) 

±0.5 °C (+50.1... +70 °C) 

15 s Plug-in head, 0636 2130 


0143 or 0430 0145 

required 

Differential 0... +100 Pa ±(0.3 Pa ±0.5% of mv) 

pressure probe 

(0... +100 Pa) 

Differential 


Absolute pressure 

probe 

Low pressure 

probe 

High pressure 

probe 

0... +100 hPa ±0.5% of mv (+20... 

+100 hPa) 

±0.1 hPa (0... +20 hPa) 

0638 1345 

Differential 


0... +10 hPa ±0.03 hPa (0... +10 hPa) 0638 1445 

High pressure 

probe 

0638 1545 

0... +2000 hPa ±5 hPa (0... +2000 hPa) 0638 1645 

-1... +10 bar ±1% of f.v. (-1... +10 bar) Plug-in head, 

0638 1740 

Overload 


±32 bar (-1... +10 bar) 1745 required 

0... +30 bar ±1% of f.v. (0... +30 bar) Plug-in head, 

0638 1840 

Overload 


±70 bar (0... +30 bar) 1745 required 

0... +40 bar ±1% of f.v. (0... +40 bar) Plug-in head, 

0638 1940 

Overload 


±70 bar (0... +40 bar) 1745 required 

151 

°C 

%RH 

td 

g/kg 

hPa 

m/s 

m³/h 

ppm 

CO 

ppm 

CO2 

rpm 

mA 

V

152 

°C 

%RH 

td 

g/kg 

hPa 

m/s 

m³/h 

ppm 

CO 

ppm 

CO2 

rpm 

mA 

V 



Caps for humidity probes Ø 12 and 21 mm Illustration For humidity probes: 

Part no. 

Metal protection cage, Ø 21 mm for humidity probes, material: stainless steel V4A. Quick adjustment 

time, robust and temperature-proof. Used when measuring velocities of less than 10 m/s 

Metal protection cage, Ø 12 mm for humidity probes, material: stainless steel V4A. Quick adjustment 

time, robust and temperature-proof. Used when measuring velocities of less than 10 m/s. 

Wire mesh filter, Ø 21 mm, insertable filter for metal protection cage and plastic cap. Material: 

stainless steel V4A, quick adjustment time, protects from dirt and damage. Applications: meteorology, 

splashwater, condensation. 

Cap with wire mesh filter, Ø 12 mm 

Teflon sintered filter, Ø 21 mm, PTFE. Not affected by condensation, water-repellent, resistant to 

corrosive substances. Applications: compressed air measurements, high humidity range (continuous 

measurements), high velocities 

Teflon sintered filter, Ø 12 mm, PTFE. Not affected by condensation, water-repellent, resistant to 

corrosive substances. Applications: compressed air measurements, high humidity range (continuous 

measurements), high velocities 

Stainless steel sintered cap, Ø 21 mm, made of stainless steel V2A. Highly robust, suitable for 

penetration, clean with compressed air, mechanical protection of sensor. Applications: high 

mechanical loads, high velocity speeds. 

Stainless steel sintered cap, Ø 12mm, made of stainless steel V2A. Highly robust, suitable for 

penetration, should be cleaned with compressed air, mechanical protection of sensor. Applications: 

high mechanical loads, high velocity speeds. 

Teflon cap, Ø 5 mm, attachable, PTFE material, (5 off). Applications: dust protection, high humidity 

level measurements, high velocities 



Cable, 5 m long, connects probe with plug-in head to measuring instrument 


Extension cable, 5 m long, between plug-in head cable and instrument 


Telescopic handle, max. 1 m, for probe with plug-in head 

Cable: 2.5 m long, PUR coating material 

Telescopic handle, 340 - 800mm long 

Adapter for surface humidity measuring, for humidity probes Ø 12mm 

Locates damp spots on walls, for example 

Cap for bore holes, for humidity probe with 12mm diameter 

Measures equilibrium moisture in bore holes 

Control and humidity adjustment set 11.3%RH/75.3%RH incl. adapter for 

humidity probes 

Control and storage humidity (33%RH) for humidity probes 

0430 0143 

0430 0145 

0409 0063 

0430 0144 

0430 9715 

0628 0012 

0554 2140 

0554 0660 

0554 0636 

Ø 21 mm 

Ø 12 mm 

Ø 21 mm 

Ø 21 mm 

Ø 12 mm 

Ø 21 mm 

Ø 12 mm 

Ø 5 mm 

All humidity probes with Ø 21 mm 0554 0665 

0636 9740, 0636 9715 0554 0755 




0636 9769, 0636 9740, 0636 9715 0554 0756 

All humidity probes Ø 21 mm 0554 0640 

0636 9740, 0636 9715 0554 0647 

0636 2130 0554 1031 

Accessories for humidity probes/sensors Part no. 

Accessories for pressure probes 

Part no. 

Connection cable for pressure probes 0638 1740, 0638 1840, 0638 1940 

Magnetic holder for pressure probes 

For pressure probes 0638 1345/..1445/..1545/..1645 

Adapter for pressure probes, 1/2" outer thread, 1/4" inner thread 

Why you should choose humidity meas. instr. from Testo 

09/00 

12/00 

Inter-lab. tests 

KRISS 

NRCCRM 

08/01 

04/00 

PTB 

10/00 

05/00 

JQA 

03/01 

03/99 

08/96 

PTB 

04/96 

10/98 

INTA 

10/98 

Three precision probes were subjected to extensive inter-laboratory tests at the PTB in Berlin, NIST in 

the USA, the French national institute CETIAT, the Italian institute IMGC, the English national institute 

NPL, the Spanish national institute INTA, JQA in Japan, KRISS in Korea, NRCCRM in Peking and in 

Testo`s DKD calibration laboratory. The results confirm an accuracy of ±1 %RH for the probes, as 

indicated by Testo. 

10/96 

09/98 

CETIAT 

12/96 

07/97 

NPL 

10/96 

09/98 

NIST 

IMGC 

05/97 

10/97 

Deviation from resp. reference in %RH 

3 

2 

1 

0 

-1 

-2 

Long-term stability of Testo humidity sensor 

Reference humidity probes for highest precision 

- Accuracy ±1 %RH 

- 2 year guaranteed long-term stability under 

normal conditions 

0409 1745 

0554 0225 

0699 3127 

PTB; 23.08.1996 

JQA; 10.04.2000 

25°C 

-3 

0 10 20 30 40 50 60 70 80 90 100 

Results of the worldwide inter-laboratory test on 3 

precision humidity probes 1996-1997

158 

°C 

%RH 

td 

g/kg 

hPa 

m/s 

m³/h 

ppm 

CO 

ppm 

CO2 

rpm 

mA 

V 

Outgoing air 

Ingoing air/VAC->insulator 

Example of layout of a clean room 

Lab A2 

44.4 % 

22.5 °C 

Clean room Class D 

43.1 % 

Mean 

Isolator Class A 

Checking the flow speed using the hot wire probe Part no.: 0635 1041 

Ingoing air/VAC->clean room 

Outgoing air 

testo 400 display during the calibration of a 

stationary transmitter: 

Left display half: Reference humidity probe 

Right display half: 4-20 output measurement 

in a transmitter using current/voltage cable 

(scaling 0-100%RH) 


Defined process ambient conditions must be 

assured for the qualification and validation 

of the high quality standards of production 

units in clean rooms. 

Air exchange and the resulting air flow are 

linked directly to air temperature and air 

moisture. Specified air flows produce 

defined positive pressures which prevent the 

ingress of impurities from outside. 

Testo's measurement technology has proven 

to be ideal for testing process ambient 

conditions. 

With the testo 400 reference measuring 

instrument, you have the possibility of 

connecting 2 probes simultaneously. The 

measuring instrument can then be used to 

monitor measurements on-site or for longterm 

measurements thanks to the integrated 

readings memory with capacity for 48,000 

data. 

Typical measurement tasks: 

differential pressure monitoring 

using the 100 Pa probe 

The testo 100 Pa probe with an accuracy of 

±(0.3 Pa + 0.5 % of the reading) is the ideal 

solution. 

Position dependencies are completely 

eliminated thanks to the revolutionary 

double membrane technology and 

fluctuations in temperature no longer have 

any influence on the measured result thanks 

to temperature compensation. 

Recommended kit: 

The Pro Set for clean room systems 



Precision pressure probe, 100 Pa, measures differential pressure and velocities 

(in connection with Pitot tube) 

Precision air probe 

Plug-in head, connection cable 0430 0143 or 0430 0145 required 

Highly accurate reference humidity/temp. probe incl. calibration certificate 

Plug-in head, connection cable 0430 0143 or 0430 0145 required 



Quick-action hot wire probe, Ø 10 mm, with telescopic handle, for 

measurements in the lower velocity range with direction recognition 

Bendable vane probe (can be bent by 90°), Ø 100 mm, attachable to handle or 

telescopic handle, for measurements on ventilation outlets 

Professional telescopic handle for plug-in vane probes, max. 1 m long, 

extension on request 

Current/voltage cable (±1 V, ±10 V, 20 mA) 





Accurate air temp. measurement 

testo 400 achieves a system accuracy of 

0.1°C and a resolution of 0.01°C when used 

together with the precision air probe (Pt100 

Class B 1/10). 

Accurate air moisture measurement 

The task at hand is to monitor exactly the 

fluctuations in air moisture with an accuracy 

of up to ±1%RH. testo 400 sets new 

standards in terms of accuracy and longterm 

stability. The worldwide inter-laboratory 

test with the patented humidity sensor in 

leading, international institutes confirm the 

stated values. 

Measurement of ideal air supply 

testo 400, with its thermal, vane and pitot 

tube measurements, has all the technology 

available to measure air flow. A calibration 

accuracy from 0.5% of the reading is 

assured thanks to the first PTB accredited 

DKD laboratory for flow. 

Function test on lab extractors 

Regular testing of the air function can be 

carried out as a differential pressure or 

speed measurement in the ventilation 

connection above the extractor or at the 

sliding front opening. Based on DIN 12950 

and DIN 12924, we can recommend the hot 

wire probe 0635 1041, vane probe Ø 100 

mm 0635 9340 and the differential pressure 

probes 0638 1345 / 0638 1445. 

Stationary transmitters 

The check is carried out using the 

current/voltage cable (0 to 20 mA, 0 to 1 V, 0 

to 10 V) and there is a possibility of 

integrating additional parameters. 

Part no. 

0563 4001 

0638 1345 

0628 0017 

0636 9741 

0430 0143 

0430 0143 

0635 1041 

0635 9340 

0430 0941 

0554 0007 

0516 0410 

0554 0830 

RS232 cable 

0409 0178 


We recommend: DKD calibration certificates for temperature, humidity, velocity, pressure 

(See Calibration)


The professional set for comfort level measurements and occupational safety and health 

The thermal well-being of humans depends 

to a great extent on ambient air flow. 

Humans react sensitively to draughts. 

Draught air is the most common reason for 

complaints about climate. 

Testo´s direction-independent comfort probe 

has been specially designed to analyse these 

draughts. When used together with the testo 

400 reference measuring instrument, it is 

possible to set up a reading sequence and to 

calculate the corresponding mean. 

However, the mean air flow alone is not 

sufficient to assess the effect on people. The 

fluctuations in ambient air flow is also 

important. The degree of turbulence required 

in the respective standards and guidelines is 

a measure of this. It is also calculated 

automatically by the testo 400 reference 

measuring instrument. 

Standards recommend that air flow is 

measured directly at the workplace at a 

height of 0.1 m, 0.6 m and 1.1 m (for seated 

persons) or 0.1 m, 1.1 m and 1.7 m (for 

standing persons). 

Th maximum mean air flow depends on the 

air temperature measured and the degree of 

turbulence calculated in each case (see 

graphics). 




2 channel multi-function measuring instrument 

Comfort level probe for measuring degree of turbulence levels, with telescope 

and stand. Fulfills DIN 1946 Part 2 or VDI 2080 requirements 


We recommend: 

CO2 probe measures indoor air quality and monitors the workplace. With plugin 

head, connection cable 0430 0143 or 0430 0145 required 



Standard indoor air quality probe up to +70°C 

Measures all physical parameters in the Mollier diagram 

Quick-action surface probe with sprung thermocouple strip, measuring range 

short-term to +500°C 



- Draught prevention in the workplace 

- Measure ambient air flow in airconditioned 

rooms in accordance with DIN 

1946 Part 2, ISO 7726 

- Automatic calculation of degree of 

turbulence (with testo 400) 

- Fulfills the accuracy specifications of DIN 

1946 Part 2, VDI 2080, ISO 7726 

Part no. 

0563 4001 

0628 0009 

0554 0570 

0632 1240 

0430 0143 

0636 9740 

0604 0194 

0430 0143 

Mean air flow in m/s 

The normally time-consuming degree of turbulence calculation is carried out automatically 

by the testo 400 measuring instrument. 

Example: air temp.: 24.4°C, turbulence: 10% 

Degree of turbulence calculation: maximum mean air flow 0.26 m/s 

12.07.00 01:51:02 

Turbulence 

OFFICE 1 

Mean: 

1 

2 

Turbulence: 

10% 

Info: 

0.26 

24.4 

m/s 

°C 

testo 400 set up with turbulence degree probe 

Air temperature in °F 

Degree of turbulence T 

Air temperature in °C 

Mean air flow in fpm 

10.0% turbulence 

0.26 m/s 

24.4°C 

Continue ➔ End 

testo 400 printout e.g. on attachable printer testo 400 display with calculated degree of 

turbulence, mean air flow and air 

temperature 

157 

°C 

%RH 

td 

g/kg 

hPa 

m/s 

m³/h 

ppm 

CO 

ppm 

CO2 

rpm 

mA 

V

156 

°C 

%RH 

td 

g/kg 

hPa 

m/s 

m³/h 

ppm 

CO 

ppm 

CO2 

rpm 

mA 

V 

Measure with testo 400 and WBGT probe 

30.09.02 13:42:30 

Hall 2 

40.0 

26.4 

Tg 

20.5 

Tw 

°C 

°C 

WBGT 

25.1 

Ta °C 

WBGTS 

Mean 

24.9 

testo 400 on-site printout e.g. with 

attachable printer 

°C 

°C 

The WBGT case for fast assessment of workplaces 

Hall 2 

40.0 

Tg 

20.5 

Tw 

°C 

°C 

WBGT 

25.1 

Ta °C 

WBGTS 

Mean 


26.4 

24.9 

°C 

°C 

Calculated WBGT and WBGTS indices are 

displayed directly 

Wet Bulb Globe Temperature 

The professional set for assessing workplaces subjected to heat 

The measurement task involves assessing 

workplaces, particularly those subjected to 

heat radiation: 

The WBGT probe is used to determine the 

WBGT (Wet Bulb Globe Temperature) 

climate index in accordance with DIN 33403 

and ISO 7243. 

The WBGT index is used to determine the 

maximum allowable exposure time at 

workplaces subjected to heat. 

Possible applications are e.g.: 

- Steel industry 

- Foundries 

- Glass industry 

- Furnaces 

- Ceramics industry. 

Heat radiation causes an increase in 

temperature based on: 

- the thermal influence of the surroundings 

- Work intensity 

- Thermal transfer of clothing 

- Duration of exposure. 

If this burden is too high, there is a risk of a 

circulatory collapse, heat cramps or heat 

stroke. 




Wet Bulb Globe temperature probe to assess workplaces subjected to heat, in 

accordance with ISO 7243 or DIN 33403, incl. WBGT case 

Attachable printer (securely attached) including 1 roll of thermal paper and 

batteries 

Quickly prints readings on location 

Three different temperatures are required in 

order to be able to calculate WBGT: 

- Temperature of a naturally ventilated, 

moisturised thermometer (Tw), natural wet 

bulb temperature 

- Globe temperature (Tg) 

- Air temperature (Ta). 

The calculation is carried out inside and 

outside buildings without solar radiation: 

WBGT = 0.7 Tw + 0.3 Tg 

Outside buildings with solar radiation: 

WBGTS = 0.7 Tw + 0.2 Tg + 0.1 Ta 

The testo 400 measuring instrument 

calculates indices and shows them in the 

display. 

The measurement should be the following 

for standing work: 1.7/1.1/0.1 m and 

1.1/0.6/0.1 m for sedentary work. 

Part no. 

0563 4001 

0635 8888 

ID No. 

0699 4239/1 

0554 0570


For fast measurements on VAC systems 

testo 400 with its VAC module is 

currently the only measuring system 

worldwide with which a quick and 

objective assessment of the 

functionality of a VAC system can be 

carried out without the need for any 

additional calculations. Measurement 

stipulations are based on 

internationally recognised standards; 

VDI 2080 in Germany, the 12599 Draft 

EN standard for Europe as well as 

Ashrae in the US. These are the first 

automated measurement procedures 

which fulfill the requirements of these 

standards. 

The testo 400 measuring instrument is 

simply positioned on the ventilation 

duct via a magnetic holder which 

means that the user always has one 

hand free. The location data which 

includes location name, measurement 

coordinates, duct area, correction 

factor etc. are automatically read into 

the measuring instrument. 

The measurement data saved in testo 

400 is transmitted to your PC at the 

touch of a button. Time-consuming 

writing is eliminated, the calculations 

are done automatically by testo 400. 

The measurement results are printed 

using a VDI or EN standard layout. 






VAC module upgrade 

Volume flow calculation in ducts with error calculation function in instrument 



VAC module upgrade, PC software, (for ComSoft 3 software) 

Printout of standard measurement protocols 

RS232 cable 


Bendable vane probe (can be bent by 90°), Ø 100 mm, attachable to handle or 

telescopic handle, for measurements on ventilation outlets 

Vane/temperature probe, Ø 16 mm, attachable to handle or telescopic handle 




SoftCase (protects instrument from impact) with carrier strap, magnetic holder 

and probe holder 

SoftCase for attachable printer (protects printer from dirt/impact) 

Protects from impact and falls 



Part no. 

0563 4001 

0554 9481 

0450 4010 

0554 0830 

0554 4030 

0409 0178 

0635 9340 

0635 9540 

0430 0941 

0554 0570 

0516 0401 

0516 0411 

0516 0410 

We recommend: DKD calibration certificate/Temperature 

0520 0201 

El. resistance thermometer, el. thermometer; cal. points selectable from -80 to +1000°C 

Mean 

2.0 + 

- 0.8 m/s 

14760 + 

- 5525 m3/h 

Assessment of measurement directly 

on location with integrated uncertainty 

calculation 

1/1 (H 250 / V 500 mm) 

x + + + 

+ + + + 

The coordinates required for the grid 

measurement are shown in the 

instrument display. The depth 

information on the vane telescopic 

handle makes the task that much 

easier in practice. 

The specialist case for fast assessment of ventilation/air conditioning systems 

155 

°C 

%RH 

td 

g/kg 

hPa 

m/s 

m³/h 

ppm 

CO 

ppm 

CO2 

rpm 

mA 

V

154 

°C 

%RH 

td 

g/kg 

hPa 

m/s 

m³/h 

ppm 

CO 

ppm 

CO2 

rpm 

mA 

V 

Pitot tube, stainless steel, 360 mm long, measures 

velocity with temperature, for pressure probes 0638 

1345/..1445/..1545 



1345/..1445/..1545 



1345/..1445/..1545 

Comfort level measurement 

3-function probe for simultaneous measurement of 

temperature, humidity and velocity. With plug-in head, 

0430 0143 connection cable required 

Shell anemometer, 3 m cable, for meteorological 

wind measurement 

270 mm 

Ø 21 mm 


360 mm 

500 mm 

1000 mm 

Ø 8 mm 

Ø 8 mm 

Ø 8 mm 




Hot bulb 

Testo humid. sensor, cap. 

NTC 

Hot wire 

NTC 


Pitot tube measurement Illustration Probe type Meas. range Accuracy Part no. 

Straight Pitot tubes 

Comfort level probe for measuring degree of 

turbulence levels, with telescope and stand. 

Fulfills DIN 1946 Part 2 or VDI 2080 

Wet Bulb Globe temperature probe to assess 

workplaces subjected to heat, in accordance with 

ISO 7243 or DIN 33403, incl. WBGT case 

890 mm 

Ø 90 mm 

-40... +600 °C 0635 2040 

-40... +600 °C 0635 2140 

-40... +600 °C 0635 2240 

Accessories for pressure probes Part no. Accessories for pressure probes Part no. 

Connection hose, silicone, 5m long 

Silicone hose connects Pitot tube and pressure probe, 5 m long 

Other 

0554 0440 

Magnetic holder for pressure probes 

For pressure probes 0638 1345/..1445/..1545/..1645 

0... +10 m/s 

0... +100 %RH 

-20... +70 °C 

0... +5 m/s 

0... +50 °C 

Accessories for 3-function probe Part no. Accessories for 3-function probe 

Adapter for humidity adjustment of 3-function probe 0635 1540 

Order with adjustment set 

0554 0661 

Measuring and application ranges of velocity probes 

100 

60 

40 

20 

15 

10 

0 

m/s 

Thermal 

probes 

up to +70°C Up to +140°C Up to +350°C 

The flow measuring range 0 to 100 m/s can be 

divided into three sections: 

- Low-speed velocity 0 to 5 m/s 

- Mid-speed velocity 5 to 40 m/s 

- High-speed velocity 40 to 100 m/s 

Ø 150 mm 

Vane probes 

up to +60°C 

Thermal probes are used for 

accurate measurements in the range 

0 to 5 m/s. Vane probes are ideal for 

velocities from 5 to 40 m/s. The 

measuring range of the Pitot tube 

depends on the differential probe 

used. The new 100 Pa probe can 

±(0.03 m/s ±5% of mv) (0... +10 m/s) 

±2 %RH (+2... +98 %RH) 

±0.4 °C (0... +50 °C) 

±0.5 °C (-20... 0 °C) 

±0.5 °C (+50.1... +70 °C) 

±(0.03 m/s ±4% of mv) 

(0... +5 m/s) 

±0.3 °C (0... +50 °C) 

0... +120 °C In accordance with 

ISO 7243 or DIN 

33403 



Vane/temperature probes 

therefore be used for the exact 

measurement of the flow speed from 

approx. 1 m/s to 12 m/s. The Pitot 

tube yields optimum results in the 

higher velocity range. An additional 

criterion when selecting the correct 

velocity probe is the temperature. 

Vane +0.7... +30 m/s ±(0.3 m/s ±5% of mv) 

(+0.7... +30 m/s) 

Pitot tube 

to +600°C 

Thermal sensors can normally be 

used at up to approx. +70°C. 

Special design vane probes can be 

used to maximum +350°C. Pitot 

tubes are used for temperatures 

above +350°C. 

0554 0225 

0635 1540 

0628 0009 

0635 8888 

ID No. 

0699 4239/1 

Part no. 

0430 0143 

0635 9045 

NiCr-Ni Pitot 

tube 

-40 to +600°C



Vane probes Illustration Probe type Meas. range Accuracy Part no. 

Vane probe, Ø 12 mm, can be attached to handle 

or telescopic handle 

Vane/temperature probe, Ø 16 mm, attachable to 

handle or telescopic handle 

Vane/temperature probe, Ø 25 mm, can be 

attached to handle or telescopic handle 

Bendable vane probe (can be bent by 90°), Ø 60 

mm, attachable to handle or telescopic handle, for 

measurements on ventilation outlets 

Bendable vane probe (can be bent by 90°), Ø 100 

mm, attachable to handle or telescopic handle, for 

measurements on ventilation outlets 

Vane probe, Ø 16 mm, for stationary assembly, 3 

m cable (PVC) 

High temperature vane probe, Ø 25 mm, with 

handle for continuous measurements up to 

+350°C 

Ø 60 mm 

180 mm 

180 mm 

180 mm 

Ø 100 mm 

Accessories/Vane probes Part no. Accessories/Vane probes 



Extension for telescopic handle, 2 m long 

Please also order the 0409 0063 extension cable 

Handle for plug-in vane probes 

250 mm 

Ø 16 mm 

560 mm 

0430 0941 

0430 0942 

0430 3545 

Ø 12 mm 

Ø 16 mm 

Ø 25 mm 

Vane 

+0.6... +20 m/s ±(0.2 m/s ±1% of mv) 

Oper. temp. 

-30... +140 °C 

(+0.6... +20 m/s) 

Vane +0.4... +60 m/s ±(0.2 m/s ±1% of mv) 

Type K (NiCr- 

Ni) 

-30... +140 °C 

(+0.4... +60 m/s) 

Vane +0.4... +40 m/s ±(0.2 m/s ±1% of mv) 

Type K (NiCr- 

Ni) 

-30... +140 °C 

(+0.4... +40 m/s) 

Vane +0.25... +20 m/s ±(0.1 m/s ±1.5% of mv) 

Oper. temp. 

0... +60 °C 

(+0.25... +20 m/s) 

Vane 

Vane 

Type K (NiCr- 

Ni) 

+0.1... +20 m/s 

Oper. temp. 

0... +60 °C 

±(0.1 m/s ±1.5% of mv) 

(+0.1... +20 m/s) 

0635 9443 

0635 9540 

0635 9640 

0635 9440 

0635 9340 

+0.4... +60 m/s ±(0.2 m/s ±1% of mv) 

(+0.4... +60 m/s) 

0628 0036 

Swan neck, flexible connection between probe and connection part 

Magnetic probe holder for vane probes 

+0.6... +20 m/s 

-40... +350 °C 

±(0.3 m/s ±1% of f.v.) 

(+0.6... +20 m/s) 

0635 6045 

0430 0001 

0554 0430 

Thermal probes Illustration Probe type Meas. range Accuracy Part no. 

Robust hot bulb probe, Ø 3 mm, for 

measurements in the lower velocity range, 2m 

cable (PVC) 

Affordable, robust hot bulb probe, Ø 3 mm, for 

measurements in the lower velocity range, with 

handle 

Robust hot bulb probe, Ø 3 mm, with handle and 

telescopic handle for measurements in the lower 

velocity range 

Quick-action hot wire probe, Ø 10 mm, with 

telescopic handle, for measurements in the lower 

velocity range with direction recognition 

Pitot tube measurement Illustration Probe type Meas. range Accuracy Part no. 

Differential pressure probes 

Precision pressure probe, 100 Pa, measures 

differential pressure and velocities (in connection 

with Pitot tube) 


pressure and velocities (in connection with Pitot 

tube) 


pressure and velocities (in connection with Pitot 

tube) 

Prandtl Pitot tubes 

Pitot tube, 300 mm long, stainless steel, 

measures velocity in connection with pressure 

probes 0638 1345/..1445/..1545 


measures velocity flow in connection with 

pressure probes 0638 1345/..1445/..1545 



probes 0638 1345/..1445/..1545 



probes 0638 1345/..1445/..1545 

850 mm 

760 mm 

150 mm 

Ø 3 mm 

150 mm 

Ø 4 mm 

300 mm Ø 4 mm 

350 mm Ø 7 mm 

500 mm Ø 7 mm 

1000 mm Ø 7 mm 

Ø 3 mm 

Ø 25 mm 

Ø 3 mm 

Ø 10 mm 

Hot bulb 

NTC 

Hot bulb 

NTC 

Hot bulb 

NTC 

Hot wire 

NTC 

Differential 0... +100 Pa ±(0.3 Pa ±0.5% of mv) 


(0... +100 Pa) 

Part no. 

0638 1345 

Differential 


0... +10 hPa ±0.03 hPa (0... +10 hPa) 0638 1445 

Differential 


0... +10 m/s 

-20... +70 °C 

0... +10 m/s 

-20... +70 °C 

0... +10 m/s 

-20... +70 °C 

0... +20 m/s 

-20... +70 °C 

0... +100 hPa ±0.5% of mv (+20... 

+100 hPa) 

±0.1 hPa (0... +20 hPa) 

0638 1545 

Oper. temp. 0635 2245 

0... +600 °C 

Oper. temp. 0635 2145 

0... +600 °C 

Oper. temp. 

0... +600 °C 

Oper. temp. 

0... +600 °C 

±(0.03 m/s ±5% of mv) 

(0... +10 m/s) 

±(0.03 m/s ±5% of mv) 

(0... +10 m/s) 

±(0.03 m/s ±5% of mv) 

(0... +10 m/s) 

±(0.03 m/s ±4% of mv) 

(0... +20 m/s) 

0628 0035 

0635 1549 

0635 1049 

0635 1041 

0635 2045 

0635 2345 

153 

°C 

%RH 

td 

g/kg 

hPa 

m/s 

m³/h 

ppm 

CO 

ppm 

CO2 

rpm 

mA 

V


Technical data 

Probe type 

Meas. range 

Accuracy 

± 1 digit 

Resolution 

Probe type NTC 

Pt100 

Meas. range -40... +150 °C 

-200... +800 °C 

Accuracy ±0.2 °C (-10... +50 °C) 

±0.1 °C (-49.9... +99.9 °C) 

± 1 digit 

±0.4 °C (-40... -10.1 °C) 

±0.4 °C (-99.9... -50 °C) 

±0.4 °C (+50.1... +150 °C) ±0.4 °C (+100... +199.9 °C) 

±1 °C (-200... -100 °C) 

±1 °C (+200... +800 °C) 

Resolution 0.1 °C (-40... +150 °C) 

0.01 °C (-99.9... +300 °C) 

0.1 °C (-200... -100 °C) 

0.1 °C (+300.1... +800 °C) 

Probe type 

Meas. range 

Accuracy 

± 1 digit 

Resolution 

PC RS232 interface 

Oper. temp. 0... +50 °C 

Storage temp. -25... +60 °C 

Battery type 1.5 V AA 

Battery life 18 h 

Vane 

0... +60 m/s 

CO2 probe 

Weight 500 g 

Warranty 3 years 

See Probes data for system 

accuracy 

0.01 m/s (for Ø 60/100 mm), 

0.1 m/s (for remaining 

probes) 

Probe type Testo humid. sensor, cap. 

Meas. range 0... +100 %RH 

Accuracy See probe data 

± 1 digit 

Resolution 0.1 %RH (0... +100 %RH) 

0... +1 Vol. % CO2 

0... +10000 ppm CO2 

See probe data 

Thermal 

0... +20 m/s 

±0.01 m/s (0... +1.99 m/s) 

±0.02 m/s (+2... +4.9 m/s) 

±0.04 m/s (+5... +20 m/s) 

0.01 m/s (0... +20 m/s) 

Pressure 

0... +2000 hPa 

Probe 0638 1345 

Probe 0638 1445 

Probe 0638 1545 

Probe 0638 1645 

±0.1% of mv 

Probe 0638 1740 

Probe 0638 1840 

Probe 0638 1940 

±0.2% of mv 

0.001 hPa (0638 1345 probe) 

0.001 hPa (0638 1445 probe) 

0.01 hPa (0638 1545 probe) 

1 hPa (0638 1645 probe) 

0.01 bar (0638 1740 probe) 

0.01 bar (0638 1840 probe) 

0.01 bar (0638 1940 probe) 

CO probe 

0... +500 ppm CO 

±5% of mv (0... +500 ppm CO) 

Memory space in basic version: 128 kB 

corresponds to approx. 45,000 readings 

Memory space, extended: 1 MB, corresponds 

to approx. 500,000 readings 

Other features: automatic recognition of all 

connected probes 

Power supply: Battery/rech. batt., alternatively 

8 V mains unit 

Battery life in continuous operation with 2 

thermocouple probes 

aw value 

0... +1 aW 

See probe data 


-200... +1370 °C 

±0.4 °C (-100... +200 °C) 

±1 °C (-200... -100.1 °C) 

±1 °C (+200.1... +1370 °C) 

0.1 °C (-200... +1370 °C) 

Mechanical 

+20... +20000 rpm 

(+20... +20000 rpm) 

1 rpm (+20... +20000 rpm) 

Type S (Pt10Rh-Pt) 

0... +1760 °C 

±1 °C (0... +1760 °C) 

1 °C (0... +1760 °C) 

Current/voltage measurement 

0... +20 mA 

±0.04 mA (0... +20 mA) 

0.01 mA (0... +20 mA) 

Type J (Fe-CuNi) 

-200... +1000 °C 

±0.4 °C (-150... +150 °C) 

±1 °C (-200... -150.1 °C) 

±1 °C (+150.1... +1000 °C) 

0.1 °C (-200... +1000 °C) 

Current/voltage measurement 

0... +10 V 

±0.01 V (0... +10 V) 

0.01 V (0... +10 V) 

159 

°C 

%RH 

td 

g/kg 

hPa 

m/s 

m³/h 

ppm 

CO 

ppm 

CO2 

rpm 

mA 

V

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