InTrac® Series – versatile retractable housings: When process ...

INGOLD 

Leading Process Analytics 

– Enhanced process safety 

with TRI-LOCK TM 

– Reduction in overall process costs 

– Broad-based electrode / sensor 

program 

– Flexibility in process adaption 

InTrac ® Series – versatile retractable housings: 

When process safety is crucial!

Safe and reliable. 

Chemical processes: 

Greater safety even under 

demanding conditions. 

Pharmaceutical processes: 

Double flushing chamber for 

a higher degree of sterility. 

Food and beverage industry: 

Hygienic process adaption. 

InTrac retractable housings 

The new InTrac retractable housings from METTLER TOLEDO 

fulfill the highest demands on process safety and reliability 

even in harsh applications. 

Operational safety 

through TRI-LOCK TM . 

Reduced overall 

process costs. 

Broad-based electrode and 

sensor compatibility. 

Flexibility of 

process adaption. 

The TRI-LOCK TM safety system from METTLER TOLEDO prevents any release of process 

media via the housing. Without the presence of a sensor, the housing cannot 

be inserted into the process. Also it makes it impossible to remove the electrode 

from the housing when in the measuring position. An optional alignment system 

indicates the actual position of the housing at all times, even in automated systems. 

The InTrac family of retractable housings helps to substantially reduce the operating 

costs of a measuring point, by allowing well-planned automatic cleaning and 

calibration of the electrodes which will increase their average operational life significantly. 

Consequently, the performance characteristics of the individual electrodes 

can be exploited to the full, and plant productivity optimized at the same time. 

A wide variety of different types of electrodes and sensors can be used in conjunction 

with the InTrac family of retractable housings, whether in the measurement 

of pH / redox, dissolved oxygen, CO2, conductivity, or turbidity. Appropriate models 

are also available for specific applications in the chemical and pharmaceutical 

industries or for food and beverage processes. 

METTLER TOLEDO offers a variety of different process adaptions, ranging from the 

tried and tested INGOLD sockets, or flange fixtures, to special hygienic connection 

systems. The retractable housings are available both in steel and in polymer 

versions to suit individual process requirements. Immersion depths are variable, 

and can be suited to the design and configuration of vessels and pipes.

InTrac 776 e retractable housings 

InTrac 776 e: the tough one. 

InTrac 776 e retractable housings are designed for applications in the 

chemical industry in processes involving the use of pH / redox electrodes with 

liquid electrolyte reference systems, e.g. InPro 2000 or 465 Series. In the built-in 

flushing chamber, the electrode can be cleaned and, if necessary, also be 

recalibrated, both procedures without any interruption of the ongoing process. 

Also the intermittent use of these electrodes leads to an increase in their operational 

life and reduces the overall costs of the measuring point. 

Main specifications 

InTrac 776 e 

Operation Manual or pneumatic 

Immersion depths 70, 100 or 200 mm 

Electrode types Liquid-filled electrodes (InPro 2000 or 465 Series) 

Wetted O-rings Viton ®-FDA, EPDM-FDA or Kalrez ®-FDA 

Process-wetted parts DIN 1.4404 / AISI 316L, HA-C22, titanium, 

PP, PVDF, PEEK 

Specific features TRI-LOCK TM , sensor detector, position indicators, 

(optional, pneumatic or inductive version) 

Certificates / approvals CE: • 

PED*: • 

ATEX (94/9/EC): • 

MaxCert TM : • * PED = pressure equipment directive, 97/23/EC 

InTrac 776 e 

(with pneumatic position indicators) 

MaxCert from METTLER TOLEDO 

covering the following certificates / 

approvals included in delivery: 

– Material certificate 

according to 3.1B 

– Confirmation of FDA conformity 

of wetted parts according 

to EN 10 204-2.1 

– Additional relevant certificates 

(depending upon type of housing) 

TRI-LOCK from METTLER TOLEDO 

provides the following 

elements of safety: 

– Safe sealing of process medium 

– No motion of housing without 

sensor / electrode in place 

– No removal of sensor / electrode 

possible while housing in 

measuring position (immersed) 

– No unintentional release of 

process media possible 

High flexibility in 

process adaptions 

METTLER TOLEDO 

offers a wide 

selection of process 

adaptions in various materials and 

sizes, such as 

– DN 25 for INGOLD weld-in sockets 

– Flanges (DIN and ANSI) 

– NPT threads 

– TriClamp 

– Tuchenhagen Varivent 

InTrac 776 e 

(pneumatic type, made of PP)

InTrac 777 e 

(pneumatic version, made of PVDF) 

InTrac 777 e / 797 e / 798 e retractable housings 

InTrac 777e / 797e / 798 e versatility at a glance. 

The InTrac 777 e / 797 e retractable housings have been specifically designed 

for use with 12 mm electrodes and sensors for the measurement of pH / redox, 

dissolved oxygen, CO2 and conductivity in industrial processes. InTrac 777 e with 

a single flushing chamber is suitable for employment in the chemical industry. 

InTrac797 e with double chambers is the preferred choice for sterile processes in 

the pharmaceutical industry. The InTrac 798 e with the hygienic design (EHEDG) is 

the optimal housing for the food & beverage industries. Special models 

(InTrac 779 e / 799 e) are also available for InPro 8100 / 8200 turbidity sensors. 

Main specifications 

InTrac 797 e 

(manual version) 

Use in Ex-classified 

zones 

The InTrac 776 e / 777e / 797e 

retractable housings (steel 

versions) are intrinsically safe for 

operation in Ex-classified zones 

according to guideline 

ATEX 94/9/EC. 

InTrac 777 e and InTrac 797 e InTrac 798 e 

Operation Manual or pneumatic Manual or pneumatic 

Immersion InTrac 777 e / 779 e: 70, 100 or 200 mm 50 or 100 mm 

depths InTrac 797 e / 799 e: 100 mm 

Electrodes / sensors pH: Gel or solid polymer electrolyte models, ø 12 mm All 120 mm electrodes / sensors 

CO 2: InPro 5000 (InTrac 797 e) with Pg 13.5 thread and 12 mm 

Dissolved oxygen: InPro 6800 / InPro 6900 diameter (except turbidity sensors) 

Conductivity: InPro 7001 (not with InTrac 797 e) 

Turbidity: InPro 8100 / InPro 8200 

Wetted O-rings Viton ®-FDA, EPDM-FDA or Kalrez ®-FDA / USP VI EPDM-FDA 

Process-wetted InTrac 77X e: DIN 1.4404 / AISI 316L, HA-C22, titanium, DIN 1.4404 

parts PP, PVDF, PEEK 

InTrac 79X e: DIN 1.4404 / AISI 316L 

Flexible process adapation 776 e 777 e / 779 e 797 e / 799 e 

DN 25: • • • • 

Flanges (DIN, ANSI): • • 

NPT thread: • • 

TriClamp: • • • • 

Tuchenhagen Varivent: • • • • 

Neumo DN50: • 

Specific features TRI-LOCK TM , sensor detector, position indicators, Hygenic design, uniform 

(optional, pneumatic or inductive version) sensor length 120 mm 

Certificates / approvals CE: • • 

PED*: • 

ATEX (94/9/EC): • 

MaxCert TM : • 

Sterile test: • (for InTrac 797 e / 799 e) 

EHEDG: on request • 

3A: on request • 

* PED = pressure equipment directive, 97/23/EC 

InTrac 798 e 

(pneumatic version)

InTrac retractable housings in the measurement loop 

Automatic control with EasyClean. 

The new retractable housings combined with the EasyClean automatic cleaning and calibration system 

form unique measuring systems. These systems accomodate specific maintenance objectives aimed 

at optimizing process safety as well as maintenance costs – even in the most demanding applications. 

Examples of a complete measurement loop 

Field of application Retractable Parameter Electrodes / Transmitter Cleaning & 

housing Sensors Calibration 

System 

InTrac 776 e pH/Redox Liquid electrolyte pH2100 e 

Chemical industry electrodes pH2500 

(CPI) InTrac 777 e pH/Redox Gel and solid pH2220 X 

polymer electrolyte M700 

electrodes 

O2 InPro 6800 O24100 e EC150 

Conductivity InPro 7001-VP Cond 7100 e EC200 

InTrac 779 e Turbidity InPro 8100 Trb8300 EC300 

InPro 8200 EC300 EX 

InTrac 797 e pH InPro 3100 pH2100 e EC350 

Pharmaceutical InTrac 798 e InPro 3200 pH2500 

industry InPro 3300 M700 

O2 InPro 6800 O24100 e 

Food and Beverage InPro 6900 

Industry CO2 InPro 5000 CO25100 e 

InTrac 799 e Turbidity InPro 8100 Trb8300 

InPro 8200 

Typical system configuration for demanding applications 

~ 

Transmitter 

”Emergency” 

button 

~ 

Control unit Valve assembly 

Warning 

light 

Air 

H2O Remote control 

Buffers and 

cleaning solution 

5000 ml

Anti-blowout lip provides a positive stop 

while retracting the sensor to prevent 

accidental blowout. 

InTrac ® 787 retractable housing 

for in-line pH/ORP and O2 measurements. 

Safety chain rated to 180 kg (400 lbs.) 

for ease-of-use and maximum protection. 

INGOLD 

Leading Process Analytics 

The Mettler-Toledo InTrac 787 

retractable housing is designed for 

continuous in-line measurements in 

industrial processes including chemical, 

pulp & paper applications. 

The hot-tap design allows the sensor 

to be removed from a process line, 

tank, or vessel without interrupting the 

flow or draining the container when 

retracted through a ball valve. 

All Mettler-Toledo 12 x 120 mm sensors 

with detachable cables may be used 

with the InTrac 787. Integrated flushing 

ports allow an in-line rinsing of the electrode 

without removing it from the process. 

The ball valve provides a safe, 

tight process seal. 

For increased installation flexibility, there 

are two versions available with variable 

insertion length from 0 to 100 mm, and 

0 to 300 mm. 

Key safety advantages include 

– Safe process sealing due to a ball valve 

– Integrated anti-blowout lip prevents 

accidental blowout 

– Safety chain rated to 1.7 kN (400 lbs.) 

working load limit 

– Double o-ring process seals 

provide redundant protection 

against process leakage 

– Flushing ports for cleaning without 

interrupting the process 

– Two different sensor insertion 

depths (100/300 mm 4/12") 

– All wetted parts 3.1B certified

1 

2 

3 

4 

5 

6 

7 

InTrac ® 787 retractable housing 

InTrac ® 787 retractable housing. 

ISO 

9001 

certified 

102/300 mm 

551/ 754 mm 

1 Quick release latch 

2 SS chain 

3 Dual o-ring seal 

4 Wiper ring 

5 Electrode holder 

6 Cage for electrode 

protection 

7 Anti blow out lip 

ISO 

14001 

certified 

Management System 

certified according to 

ISO 9001 / ISO 14001 

The InTrac 787 has been specially designed to meet your application requirements by offering two versions 

for the process insertion tube. The standard housing was designed to fit any of our detachable cable 

120 mm sensors and features a sensor cage for added protection against sensor breakage and optional 

flushing ports for increased cleanability. 

Specifications 

Dimensions see dimensional drawing 

Maximum pressure* 9 bar (130 psi) 

Maximum temperature* 140 °C ( 266 °F) 

Insertion length variable 0 to 100 (300) mm / 0” to 4 (12)" 

Wetted parts Housing 316L Stainless Steel (3.1B) 

O-rings Viton ® 

Ball valve Ball 316 (1.4401) 

Housing CF-8M (1.4408) 

Sealing PTFE 

Ball valve DN40, 1.5" NPT full port 

* See electrode specification 

Ordering information 

InTrac 787 including: complete housing with ball valve, electrode holder (120 mm) with protection cage and flushing ports. 

Description Order Number 

InTrac 787/100 mm (4") 52 402 401 

InTrac 787/300 mm (12") 52 402 402 

Flange C40 PN16 1 1 /2" NPT 52 402 404 

Flange ANSI 150/6 1 1 /2" NPT 52 402 405 

See appropriate data sheets for sensor and cable specifications and ordering information. 

Spare parts and options 

Immersion tube complete for 100 mm (4")version, incl. 3.1B 52 402 389 

Immersion tube complete for 300 mm (12") version, incl. 3.1B 52 402 390 

Ball valve / DN40-1"NPT / 3.1B 52 402 422 

Double nipple 1" NPT / 3.1B 52 402 421 

Serto for flushing ports 787 / D6 mm 52 402 465 

Serto for flushing ports 787 / D6,35 mm 52 402 466 

Swagelok for flushing port 787 / 6 mm 52 402 467 

Swagelok for flushing port 787 / 6,35 mm 52 402 468 

O-ring set (5) InTrac787 Viton cpl. 52 402 403 

O-ring set (5) 120 mm electrode holder / Vi 52 402 463 

Flushing chamber InTrac787 incl. nipples 52 402 464 

Electrode holder 120 mm cpl. 52 402 469 

Chain cpl. 52 402 470 

Cable fitting cpl. 52 402 471 

InPro ® , InTrac ® , and Xerolyt ® are registered trademarks of Mettler-Toledo, Inc. 

Viton ® is a registered trademark of E.I. DuPont de Nemours and Co. 

INTERNET 

http://www.mtpro.com 

Mettler-Toledo GmbH, Process Analytics 

Industrie Nord, CH-8902 Urdorf 

Phone + 41 44 729 62 11, Fax +41 44 729 66 36 

Subject to technical changes. 

© Mettler-Toledo GmbH 01/06. 

Printed in Switzerland. 52 402 505 

Sales and service:

InTrac 785 Retractable Housing 

Easy Sensor Access 

In Harsh Chemical Applications 

Flexibility in 

maintenance intervals 

Gain access to the sensor without interrupting 

the process. Simple retraction and 

process sealing via ball valve allows easy 

maintenance. 

Wide range of 

installation options 

Adjustable insertion length up to 220 mm 

(8.66") allows simple installation in a 

variety of applications. The unique design 

provides further versatility by accepting 

any pH, DO and Turbidity measurements. 

Different process connections are available 

to have multiple installation options. 

Increased production 

uptime 

The durable design ensures reliable operation 

in the most aggressive applications. 

The housing is available in stainless steel 

Hastelloy or titanium with Viton ® or 

Kalrez ® sealing. 

High operational safety 

A ball valve is the industry proven solution 

to separate the process from the environment. 

The InTrac 785 has been engineered 

with an integral anti-blowout tip for 

maximum safety. The ball valve of the 

InTrac 785 safely isolates the sensor from 

the process for safe, continuous operation. 

InTrac 785 – The reliable and easy 

to use retractable housing for harsh 

environments 

The InTrac 785 retractable housing is the easy way of 

getting access to the sensor without process interruption. 

Whenever maintenance on the sensor is 

required, a simple retraction of the sensor and closing 

the ball valve allows fast sensor operation. 

The housing is specially designed for harsh chemical 

applications and is available in different materials 

for medium wetted parts (1.4435 / 316L, Hastelloy, 

titanium). This ensures reliable operation even in 

demanding chemical and pulp and paper applications. 

The InTrac 785 allows a wide range of installation 

possibilities, thanks to the long insertion length (useradjustable 

with an adjusting collar) and a wide variety 

of process connections. If the ball valve is already 

present or a factory standard needs to be used, this 

housing is also available without ball valve and 

process connection.

Technical data 

InTrac 785 

Designation InTrac 785 

Design pressure 16 bar / 232 psi 

Functional pressure 6 bar / 87 psi 

Process temperature 130 °C / 266 °F 

Insertion length Up to 220 mm / 8.66 inches (adjustable) 

Process connections 1" M NPT, 1 1 ⁄4" M NPT, flange ANSI A150-1.5, flange DIN DN50 PN16, 

without ball valve and process connection 

Medium wetted parts 1.4435 / 316L / C22 / titanium, ball valve always made of 1.4408 

O-ring material Viton ® or Kalrez ® 

Ball valve 1" NPT full port, 1.4408 

(also C22 and Ti versions equipped with ball valve made of 1.4408) 

Flushing chamber Optionally available 

Protective cage Yes 

Safety feature Anti-blowout tip: provides a positive stop while retracting the sensor to prevent 


Suitable sensors pH: all 12 mm design with 425 mm length 

Turbidity: all with 409 mm length 

Oxygen: all with 420 mm length 

Get on-line support 

via www.mt.com/pro 

Visit our website at any time for fast and competent information. 

The very latest, updated product and support documentation is available 

in many different languages. 

Visit our website for fast and competent information. 

Sales and service: 

■ Support center with easy 

and free download 

■ For on-line access click on 

– Contact us 

– Request more information 

– Get a quote 

www.mt.com/pro 

ISO 

9001 

certified 

ISO 

14001 

certified 

Management System 

certified according to 

ISO 9001 / ISO 14001 

216 mm/8.50" 

220 mm/8.66" 

674 mm/26.53" 

Visit for more information 

Mettler-Toledo AG 

Process Analytics 

CH - 8902 Urdorf, Switzerland 

Phone +41 44 729 62 11 

Fax +41 44 729 66 36 

Subject to technical changes. 

© 01/ 2008 Mettler-Toledo AG 

Printed in Switzerland. 52 403 860 

757 mm/29.80" 

■ Country-specific information 

■ Search functionality 

■ Find and download product 

and application documents

Housings 

156 

Retractable Housings 

Sensor Access Without Process Interruption 

Mettler-Toledo Ingold International 

InTrac 776e 

For Liquid-Filled pH-Electrodes 

USP 

Class VI 

Process Entry: Top-entry, Side-entry, Pipe-entry (see Figure 1 pg. 142) 

The retractable InTrac 776e housings are designed for applications in processes 

which utilize pH/ORP sensors that have a liquid electrolyte reference system such 

as the InPro 2000 and INGOLD 465 series electrodes. 

The housing has a built-in flushing chamber in which the electrode can be cleaned 

and calibrated if necessary, both accomplished without interruption of the process. 

This enhanced housing incorporates the TRI-LOCK safety system which increases 

process safety and reliability even in harsh applications. 



Ambient temperature Polypropylene: 0 to 70°C (32 to 158°F) 

Stainless steel: –10 to 70°C (14 to 158°F) 

Functional pressure range Manual: 0 to 5 bar (0 to 73 psig) 

Pneumatic: 0 to 8 bar (0 to 116 psig) 

Max. permissible pressure Polypropylene (PP): 6 bar/20°C (87 psig at 68°F) 

PVDF, PEEK: 6 bar/20°C (87 psig at 68°F) 

316L stainless steel: 6 bar/130°C (87 psig at 266°F) 

Hastelloy ® /Ti: 6 bar/130°C (87 psig at 266°F) 

Insertion lengths 70 mm, 100 mm, 200 mm (2.76", 3.94", 7.87") 

Wetted parts 316L stainless steel, Hastelloy-C22, titanium, 


Wetted O-rings Viton ® -FDA, EPDM-FDA, Kalrez ® -FDA-USP Class VI 

Housing length 70/100 mm: 545 mm (21.8") in process 

710 mm (28") retracted from 

process 

200 mm: 645 mm (25.4") in process 

1110 mm (43.7") retracted from 


Pneumatic conditions 4 to 8 bar (58 to 116 psig) 

Flushing connections 2 to 6 bar (29 to 87 psig) 

(water, steam) 

Position monitoring (options) Pneumatic check (3/2 way valve), G 1 8" 

Inductive check, non-Ex, M12�1 

Inductive check, Ex, M12�1 

Certificates Declaration of conformity CE; Pressure Equipment 

Directive guidelines (PED) 97/23/EC; 

Certificate of conformity according to EN10204-2.1; 

Material certificate according to 3.1; 

ATEX: II 1/2 GD IIC T6/T5/T4/T3; 

FM: IS Cl. I,II,III, Div1, GR ABCDEFG/T6; MaxCert 

Sensor Fit Guide (for Liquid-Filled pH Glass Electrodes) 

Sensor Length Insertion Length 

70 mm 100 mm 200 mm 

250 mm • • – 

450 mm – – •

Ordering Information 

InTrac 776e for Liquid-Filled pH/ORP Sensors Process Connect Insertion Length Wetted Parts Order Number 

InTrac 776e-M with Viton ® DN25 70 mm SS 52 403 220 



InTrac 776e-P with Viton ® DN25 70 mm SS 52 403 223 



InTrac 776e-M with Viton ® DN25 70 mm PVDF 52 403 226 


InTrac 776e-P with Viton ® DN25 70 mm PVDF 52 403 228 


InTrac 776e-R with Viton ® DN25 100 mm SS 52 403 230 

InTrac 776e-I with Viton ® DN25 100 mm SS 52 403 231 

InTrac 776e-M with Kalrez ® DN25 70 mm SS 52 403 232 

For the housing configuration of the InTrac 776e, InTrac 777e, and InTrac 779e, please use the product configurator below. 

Product configurator (InFit 776e, InTrac 777e, and InTrac 779e) 

Flushing chamber 

7 Single flushing chamber 

Electrode/sensor type 

6 pH electrodes with liquid electrolyte 

7 pH electrodes with gel/polymer electrolyte and sensors with Pg13.5 thread 

9 Turbidity sensors 

Operation mode 

M Manual operation 

P Pneumatic operation 

R Pneumatic operation with pneumatic position indication 

I Pneumatic operation with inductive position indication, non-Ex 

X Pneumatic operation with inductive position indication, Ex 

Insertion length (H) 

0 7 0 H = 70 mm 

1 0 0 H = 100 mm 

2 0 0 H = 200 mm 

Material (wetted parts) 

4 4 0 4 DIN 1.4404/AISI 316L (stainless steel) 

C 2 2 − DIN 2.4602/Alloy C22 

T i − − Titanium 

P P − − Polypropylene 

P V D F Polyvinylidene fluoride 

P E E K Polyetherether ketone 

Process connection 

D 0 0 INGOLD DN25 weld-in socket 

D 0 2 Flange DN32 PN16 (SS version only) 

D 0 3 Flange DN40 PN16 

D 0 4 Flange DN50-PN16 

A 0 2 ANSI Flange A150-1 1 2" 

A 0 3 ANSI Flange A150-2" 

A 0 4 ANSI Flange A150-3" 

N 0 1 NPT 1" 

N 0 2 NPT 1 1 4" 

N 0 3 NPT 1 1 2" 

T 0 1 Tri-Clamp flange 1 1 2", straight 

T 0 2 Tri-Clamp flange 2", straight 

V 0 1 Varivent flange DN50, straight 

O-ring material 

V i FKM Viton ® FDA 

E P EPDM FDA 

K a FFKM Kalrez ® 6230 FDA/USP Class VI 

Body material 

A PP conducting 

S DIN 1.4404/316L 

Flushing connections 

0 Without 

1 Serto ss 

2 PVC 

3 PVDF 

4 Gyrolok ss 

5 Swagelok ® ss 

Special 

0 Standard 

1 Special 

InTrac 7 / / / / / 

8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 

Biopharm 

Chemical 

Food & Bev. 

InTrac 77Xe 

Hastelloy ® i and titanium 

housings have cap nuts 

made of stainless steel. 

Varivent and Tri-Clamp 

flanges are available 

in stainless steel only. 

Feature Overview 

– Multiple process connections 

available 

– For use with liquid filled 

pH or ORP electrodes 

– Advanced TRI-LOCK 

safety system 

– Removes sensor without 

interruption of the process 

Other Highlights 

– MaxCert covers 

necessary certifications 

– Increased operational 

safety and reliability 

– Several materials of 

construction available 

– Pressurized chamber 

to ensure positive 

electrolyte flow 


157

Housings 

158 




InTrac 777e/779e 

The Reliable Allrounder 

USP 

Class VI 



available 

– For use with 12 mm INGOLD sensors 

– Advanced TRI-LOCK safety system 

– Removes sensor without interruption 

of the process 


– MaxCert covers necessary 

certifications 

– Increased operational safety 

and reliability 

– Several materials of constructions 

available 

– Patented safety immersion tube 


The retractable InTrac 777e/779e housings are specifically designed for applications 

in processes which utilize 12 mm pH, ORP, dissolved oxygen, CO2, 

conductivity, and turbidity (InTrac 779e) sensors. The housing has a flushing 

chamber in which the electrode can be cleaned and calibrated if necessary, both 

accomplished without interruption of the process. This enhanced housing incorporates 

the TRI-LOCK safety system which increases process safety and reliability 

even in harsh applications. Multiple process connections and materials of 

construction make the InTrac 777e/779e an excellent choice for use in either the 

chemical, biopharmaceutical or food and beverage industries. 



Ambient temperature Polypropylene: 0 to 70°C (32 to 158°F) 

Stainless steel: –10 to 70°C (14 to 158°F) 



Max. permissible pressure Polypropylene (PP): 6 bar/20°C (87 psig at 68°F) 

PVDF, PEEK: 6 bar/20°C (87 psig at 68°F) 

316L stainless steel: 6 bar/130°C (87 psig at 266°F) 

Hastelloy ® /Ti: 6 bar/130°C (87 psig at 266°F) 

Insertion lengths 70 mm, 100 mm, 200 mm (2.76", 3.94", 7.87") 

Wetted parts 316L stainless steel, Hastelloy-C22, titanium, 


Wetted O-rings Viton ® -FDA, EPDM-FDA, Kalrez ® -FDA and USP Class VI 

Housing length 70/100 mm: 360 mm (14.2") in process 



200 mm: 460 mm (18.1") in process 

915 mm (36") retracted from 













FM: IS Cl. I,II,III, Div1, GR ABCDEFG/T6; MaxCert


InTrac 777e and InTrac 779e Process Connect Insertion Length Wetted Parts Order Number 











InTrac 777e-R with Viton ® DN25 100 mm SS 52 403 215 

InTrac 777e-I with Viton ® DN25 100 mm SS 52 403 216 

InTrac 777e-M with Viton ® NPT 1" 70 mm SS 52 403 217 




If the housing configuration required is not included in the order number list above, please use the product configurator found on page 157. 

Accessories for InTrac 7XXe Housings Order Number 

Pt100-764/5 m (16.4 ft) 10 1003 104IG 

Pt1000-764/5 m (16.4 ft) 10 1003 116IG 

3/2-way valve set (2 pcs), pneumatic 52 403 023 

Inductive check-back, Non-Ex (2 pcs.) 52 403 024 

Inductive check-back, Ex (2 pcs.) 52 403 025 

O-ring set Viton ®-FDA (InTrac 7XXe) 52 403 172 

O-ring set Kalrez ®-FDA-USP Class VI (InTrac 7XXe) 52 403 173 

O-ring set EPDM-FDA (InTrac 7XXe) 52 403 174 

InFit 777e/InFit 779e Sensor Fit Guide 


70 mm 100 mm 200 mm 

205 mm (Turbidity) • 1 • 1 – 

220 mm (O2/CO2) • • – 

225 mm (pH/ORP) • • – 

407 mm (Turbidity) – – • 1 

420 mm (O2/CO2) – – • 

425 mm (pH/ORP) – – • 

1 InTrac 779e only 

Pos. 1 Pos. 2 Pos. 3 Pos. 4 Pos. 5 Pos. 1 Pos. 2 Pos. 3 Pos. 4 

Immersion tube H100/H200 

The patented design of the immersion tube H100/H200 guarantees in any 

position, safe containment of the process medium during sensor insertion and 

retraction procedures. The patented immersion tube comes as standard with 

all housings with insertion length of 100 mm and 200 mm. 

Biopharm 

Chemical 

Food & Bev. 

Wastewater 

Pos. 5 

Immersion tube H70 

Housings with an insertion length of 70 mm do not offer this feature. 

An insertion length of 70 mm might be required, where the pipe diameter does 

not allow an 100 mm insertion. 


159

Housings 

160 




InTrac 796 

For Sterile Conditions With Liquid-Filled pH-Electrodes 

USP 

Class VI 


– The InTrac 796 housing is designed to 

meet the specific application requirements 

of biotechnology processes 

– Retraction and reinsertion of the electrode 

under sterile conditions permit 

electrode servicing during process 

– Sterilizable double flushing chamber 

lock effectively prevents any external 

contamination 

The InTrac 796 retractable housings have been designed to meet the most stringent 

hygienic requirements found in the biotech, pharmaceutical, and food industries. 

A special double flushing chamber assures complete sterilization of the upper and 

lower sections of sensor and insertion shaft, allowing the sensors to be removed 

and replaced under a completely controlled sterile environment. The InTrac 796 is 

designed for use with INGOLD liquid-filled pH electrodes and is ideally suited for 

side-mounted bioreactor applications. 



Ambient temperature Immersion tube: 0 to 130°C (32 to 266°F) 

steam sterilizable 

Headpart: 0 to 80°C (32 to 176°F) 

Functional pressure range 3 to 8 bar (43.5 to 116 psig) 

Max. permissible pressure 0 to 6 bar (0 to 87 psig) 

Insertion lengths 75 mm (2.95") 

Wetted parts 316L stainless steel, DIN 1.4435 with 

3.1 material certificate 

Wetted O-rings Viton ® -FDA-USP Class VI 

Housing length 527 mm (20.8") in process 

575 mm (22.6") retracted from process 

Certificates Declaration of conformity CE; 

Material certificate according to 3.1 

Suggested Sensors 

pH DO CO2 Conductivity Turbidity 

465 N/A N/A N/A N/A 

InPro 2000 

Sensor Fit Guide 


75 mm 

250 mm • 

Process Entry: Top-entry, Side-entry, Pipe-entry (see Figure 1 pg. 142)


InTrac 796 Process Connect Bore Size Insertion Length Wetted Parts Order Number 

InTrac 796M/75 DN25 25 mm 75 mm SS 00 796 3002 

InTrac 796P/75 DN25 25 mm 75 mm SS 00 796 3010 

OPTIONS: Ra finish, electro-polish, non-reactive materials, O-rings, process connection, other Custom 

i 

Function of the double 

flushing chamber lock 

In the double flushing 

chamber design (see Figs. 1.1 and 

1.2), the measuring tip of the retracted 

electrode can be cleaned (or serviced if 

necessary), then sterilized with steam. 

In contrast to single-chamber designs, 

the double flushing chamber configuration 

ensures that after sterilization the 

lower rinsing chamber adjacent to the 

process medium always remains sterile 

when the electrode is inserted. Sterility 

is assured because the upper portion of 

the retractable shaft remains sterile as 

it passes into the lower chamber during 

sensor insertion. 

Figure 1.1 “IN” Position 

Lower rinsing chamber 

Figure 1.2 “OUT” Position 

Upper rinsing chamber 

Biopharm 

Food & Bev. 


161

Housings 

162 




InTrac 797e/799e 

When Sterile Conditions Are Required 

USP 

Class VI 



available 

– For use with 12 mm INGOLD sensors 

– Double flushing chamber 

– Removes sensor without interruption 

of the process 


– Twin-chamber lock effectively 

prevents any external contamination 

– Increased operational safety 

and reliability 

– Advanced TRI-LOCK safety system 


The retractable InTrac 797e/799e housings are specifically designed for applications 

in processes which utilize 12 mm pH, ORP, dissolved oxygen, CO2, 

conductivity, and turbidity (InTrac 799e) sensors. This sterilizable housing has 

a double flushing chamber which was designed to meet the highest demands of 

the pharmaceutical and food and beverage industries where sterile conditions are 

required. The double flushing chamber allows complete sterilization of the upper 

and lower sections of a sensor and insertion shaft allowing the electrode/sensor to 

be removed and replaced under a completely sterile environment. 



Ambient temperature Stainless steel: –10 to 70°C (14 to 158°F) 



Max. permissible pressure 316L stainless steel: 6 bar/130°C (87 psig at 266°F) 

Insertion lengths 100 mm (3.94") 

Wetted parts 316L stainless steel 

Wetted O-rings Viton ® -FDA, EPDM-FDA, Kalrez ® -FDA-USP Class VI 

Housing length 100 mm: 460 mm (18.1") in process 














FM: IS Cl. I,II,III, Div1, GR ABCDEFG/T6; MaxCert 

InTrac 797e/InTrac 799e Sensor Fit Guide 


100 mm �12 mm Sensor/Electrode 

297 mm • 1 Turbidity 

320 mm • 2 O2, CO2 

325 mm • 2 pH/ORP 

1 InTrac 799e only 

2 InTrac 797e only


InTrac 797e and InTrac 799e Process Connect Insertion Length Wetted Parts Order Number 



InTrac 797e-M with Viton ® and 768 adapter DN25 200 mm SS 52 403 234 


Accessories for InTrac 7XXe Housings Order Number 

Pt100-764/5 m (16.4 ft) 10 1003 104IG 

Pt1000-764/5 m (16.4 ft) 10 1003 116IG 

3/2-way valve set (2 pcs), pneumatic 52 403 023 

Inductive check-back, Non-Ex (2 pcs.) 52 403 024 

Inductive check-back, Ex (2 pcs.) 52 403 025 

O-ring set Viton ®-FDA (InTrac 7XXe) 52 403 172 

O-ring set Kalrez ®-FDA-USP Class VI (InTrac 7XXe) 52 403 173 

O-ring set EPDM-FDA (InTrac 7XX e) 52 403 174 

If the housing configuration required is not included in the order number list above, please use the product configurator below. 

Product configurator (InTrac 797e, InTrac 799e) 

Flushing chamber 

9 Double flushing chamber 

Electrode/sensor type 

7 pH electrodes with gel/polymer electrolyte and sensors with Pg13.5 thread 

9 Turbidity sensors 

Operation mode 

M Manual operation 

P Pneumatic operation 

R Pneumatic operation with pneumatic position indication 

I Pneumatic operation with inductive position indication, non-Ex 

X Pneumatic operation with inductive position indication, Ex 

Insertion length (H) 

1 0 0 H = 100 mm 

Material (wetted parts) 

4 4 0 4 DIN 1.4404/AISI 316L (stainless steel) 

Process connection 

D 0 0 INGOLD DN25 weld-in socket 

T 0 1 Tri-Clamp flange 1 1 2", straight 

T 0 2 Tri-Clamp flange 2", straight 

V 0 1 Varivent flange DN50, straight 

O-ring material 

V i FKM Viton ® -FDA 

E P EPDM-FDA 

K a FFKM Kalrez ® 6230-FDA/USP Class VI 

Body material 

A PP conducting 

S DIN 1.4404/316L 

Flushing connections 

0 Without 

1 Serto ss 

4 Gyrolok ss 

5 Swagelok ® ss 

Special 

0 Standard 

1 Special 

InTrac 7 / / / / / 

8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 

Biopharm 

Food & Bev. 


163

Housings 

164 




InTrac 798e 

The Hygienic Solution 


– Standard 120 mm sensors fit 

all housings: more cost effective 

– Unique self-contained design 

with no external moving parts: 

very safe operation 

– EHEDG compliance 


– 3.1 certificate included 

– Optimized drain placement assures 

no residual remains after cleaning 

– Powerful non-jamming mechanism 

works well in viscous or fibrous environments 

® 

Originally designed as a companion product to protect the InPro 3300 ISFET 

pH electrode from caustic CIP conditions, the unique benefits of the InTrac 798e 

housing can also be used with all 120 mm sensors. The InTrac 798e is 

completely self-contained and has none of the external moving parts commonly 

associated with retractable housings. Regardless of the insertion depth selected, 

less costly 120 mm sensors are needed to operate the InTrac 798e, which 

reduces overall operating expenses and inventory requirements. 

Absolute cleanability is possible because the flushing chamber drain and O-ring 

have been optimally positioned to assure all CIP solutions are completely drained 

from the chamber prior to the sensor being re-inserted into your process. 


Wetted parts Stainless 316L 

Surface finish N5/N5 (Ra16/Ra16) 

(O-ring groove/Other) 

O-ring EPDM-FDA 

Sensor fitting Pg13.5 

Temperature range 0–140°C/32–284°F 

Pressure rating 0–16 bar (0–232 psi) 

(Sensor dependent) 



pH/DO/CO2/Conductivity 

All 120 mm sensors with Pg13.5 and 12 mm diameter (except turbidity sensors) 

Sensor Fit Guide 


50 mm 100 mm 

120 mm • • 

A unique design allows the InTrac 798e housing to use 120 mm sensors regardless of the 

housing length.


InTrac 798e Process Connect Bore Size Insertion Length Wetted Parts Order Number 

InTrac 798e Manual DN25 25 mm 100 mm SS 52 402 764 

InTrac 798e Pneumatic DN25 25 mm 100 mm SS 52 402 766 

InTrac 798e Manual NEU050 25 mm 100 mm SS 52 402 768 

InTrac 798e Manual NEU050 25 mm 50 mm SS 52 402 769 

InTrac 798e Pneumatic NEU050 25 mm 100 mm SS 52 402 770 

InTrac 798e Pneumatic NEU050 25 mm 50 mm SS 52 402 771 

InTrac 798e Manual TC/2" 25 mm 100 mm SS 52 402 772 

InTrac 798e Manual TC/2" 25 mm 50 mm SS 52 402 773 

InTrac 798e Pneumatic TC/2" 25 mm 100 mm SS 52 402 774 

InTrac 798e Pneumatic TC/2" 25 mm 50 mm SS 52 402 775 

InTrac 798e Manual VAR050 25 mm 100 mm SS 52 402 776 

InTrac 798e Manual VAR050 25 mm 50 mm SS 52 402 777 

InTrac 798e Pneumatic VAR050 25 mm 100 mm SS 52 402 778 

InTrac 798e Pneumatic VAR050 25 mm 50 mm SS 52 402 779 

OPTIONS: Ra finish, electro-polish, non-reactive materials, O-rings, process connection, other Custom 

InTrac 798e Options Order Number 

Pt100-764/5 m (16.4 ft) 10 100 3104IG 

Pt1000-764/5 m (16.4 ft) 10 100 3116IG 

Inductive position indicators non-Ex (2) 52 402 398 

Pneumatic position indicators (2) 52 401 324 

InTrac 798e Spare Parts Order Number 

Twist lock tube 798e complete 52 403 560 

Sealing set 798e P 52 403 557 

Sealing set 798e M 52 403 558 

Safety system 798e complete 52 403 559 

InPro 3300 inside the InTrac 798e 

Biopharm 

Food & Bev. 


165

Housings 

166 




InTrac 787 

For Harsh Applications 

InTrac 787 is a rugged, retractable housing for the most demanding industrial 

applications. Ease-of-use and safety are the key features of this well-designed, 

“bullet-proof” process connection system. Sensor maintenance and replacement 

becomes a fast and easy task using the InTrac 787, and can be done without 

any interruption to your process. Redundant safety features prevent the retracted 

sensor and tubing from becoming a flying projectile, even under extreme conditions. 

Once retracted, the InTrac 787’s integral ball valve completely seals off 

your process, preventing loss of medium or contamination. The design allows for 

direct mounting to process lines, tanks, and other standard processing hardware. 

This housing offers variable insertion lengths, up to 300 mm (12"). 


Wetted parts Stainless 316L 

Surface finish N6/N5 (Ra32/Ra16) 

(O-ring groove/Other) 

O-ring Viton ® -FDA 

Sensor fitting InTrac 787: Pg13.5 

Temperature range Up to 130°C/266°F 

Pressure rating 9 bar (130 psi) 

(Sensor dependent) 



pH DO CO2 Conductivity Turbidity 

InPro 3030 InPro 6050 N/A InPro 7001 InPro 8050 

InPro 3100 InPro 6800 (12 mm) InPro 7108 InPro 8100 

InPro 3250 InPro 6900 InPro 8200 

InPro 4010 

InPro 4250 

InPro 4800 

DPA 

DPAS 

DXK 


– Mechanical linkage ensures 

safe operation 

– Anti-blowout lip prevents 


– Safety chain rated to 400 lbs 

working load 

– Variable insertion length: 

0 to 300 mm (0" to 12") 

– Full port 1.5" ball valve (1000 WOG 

required) 


– NEMA 4X cord grip 

– Flushing port connections 

permit sensor cleaning 

– Double O-ring process seals 

provide redundant protection against 

process leakage 

– Self-wiping retractable tube reduces 

O-ring wear


InTrac 787 Process Connect Bore Size Insertion Length Wetted Parts Order Number 

InTrac 787/100 mm (4") NPT/1.5" 1.5" 0–100 mm/0"–4" SS 52 402 401 

InTrac 787/300 mm (12") NPT/1.5" 1.5" 0–300 mm/0"–12" SS 52 402 402 

O-ring kit N/A N/A N/A Viton ®-FDA 52 402 403 

1 

2 

102/300 mm 

4"/12" 

1 Cage for electrode protection 

2 Anti-blowout lip 

3 Electrode holder 

4 Flushing connection 

5 Wiper ring 

6 Dual 0-ring seal 

7 SS chain 

8 Quick release latch 

Safety chain rated to 400 lbs. for ease-of-use and 

maximum protection. 

3 

1 1 ⁄ 2 

ca. 440/638 mm 

ca. 17"/25" 

Anti-blowout lip provides a positive stop while retracting 

the sensor to prevent accidental blowout. 

4 

5 

6 

7 

8 

Chemical 

Wastewater 


167

InTrac® Series – versatile retractable housings: When process ...

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