Thermostats for surface mounting Series ATH-SW - doc-station.ru

M. K. JUCHHEIM GmbH & Co 

Delivery address:Mackenrodtstraße 14, 

36039 Fulda, Germany 

Postal address: 36035 Fulda, Germany 

Phone: +49 661 60 03-0 

Fax: +49 661 60 03-6 07 

E-mail: mail@jumo.net 

Internet: www.jumo.net 

Thermostats 

for surface mounting 

Series ATH-SW 

Protection IP65 

Single or double thermostats 

Arrangement to DIN 3440 as 

TW = temperature monitor 

TB = temperature limiter 

STB = safety temperature limiter 

STW (STB) = safety temperature monitor 

Principle of operation 

The ATH-SW type surface mounting 

thermostats operate on the principle of 

volumetric expansion. 

Technical description 

A temperature change of the fluid in the 

sensing system (consisting of probe, capillary 

and diaphragm) produces a volume 

change. The resulting movement of the 

diaphragm operates the snap-action 

switch via a lever movement. 

Safety temperature limiter STB 

and STW (STB) fail-safe 

If the set limit is exceeded on rising 

temperature, the circuit 1-2 opens (and on 

the STB stays mechanically locked out in 

this position). 

Failure of the measuring system i.e. 

leakage of the expansion medium, causes 

the pressure under the diaphragm to drop, 

thus permanently opening the circuit 1-2. 

The circuit 1-2 is also opened if the probe 

is cooled down to a temperature below 

-10°C. 

As the temperature rises above -10°C, the 

safety temperature limiter has to be reset 

manually by pressing the reset button (on 

the STW (STB) the circuit is re-closed 

automatically). 

Lock-out facility 

On the TB and STB, exceeding the set 

temperature limit causes the circuit to be 

opened and mechanically locked out. After 

the temperature has fallen below the set 

limit by about 10% of span, the microswitch 

can be reset manually (with scale 

maximum values > 350°C ∼ 15% of span). 

When using the STW (STB) monitor as STB 

limiter, the lock-out function to DIN 3440 

must be provided by a subsequent circuit. 

12.99/00376440 

JUMO Instrument Co. Ltd. 

JUMO House 

Temple Bank, Riverway 

Harlow, Essex CM20 2TT, UK 

Phone: +44 12 79 63 55 33 

Fax: +44 12 79 63 52 62 

E-mail: sales@jumo.co.uk 

JUMO PROCESS CONTROL INC. 

885 Fox Chase, Suite 103 

Coatesville PA 19320, USA 

Phone: 610-380-8002 

1-800-554-JUMO 

Fax: 610-380-8009 

E-mail: info@JumoUSA.com 

Internet: www.JumoUSA.com 

Note: the lock-out circuit must be in 

accordance with Section 8.7 of DIN/VDE 

0116. 

Types 

Single 

thermostats 

ATH.-SW-2 




Double 

thermostats 








Type designation 

ATH . -SW- Thermostat, surface mounting, 

with microswitch 

s with pocket (Code “U” 

to Data Sheet 60.9710) 

attached to case 

f with capillary, 

Form A = plain cylindrical 

probe, supplied as standard 

-SW dust-tight and jet proof 

die-cast aluminium case 

Protection IP65 

-2 temperature monitor (TW) 

with changeover contact 

-7 temperature limiter (TB) 

with n.c. (break) contact and 

lock-out. 

The reset button can be 

operated after removing the 

cover. 

Data Sheet 60.3035 

Page 1/5 

ATHf-SW-.. 

-20 safety temperature 

monitor STW (STB) 

with changeover contact 

-70 safety temperature 

limiter (STB) 


lock-out. 

The reset button can be 

operated after removing the 

cover. 

/au switch contacts gold-plated 

/U changeover contact 

on TB and STB 

Standard accessory 

Operating Instructions B 60.3035. 

ATHs-SW-..

M. K. JUCHHEIM GmbH & Co • 36035 Fulda, Germany Data Sheet 60.3035 Page 2/5 

Table of ranges and probes (liquid-filled) 

for TW and TB 

Range 

°C 

–50 to +030 

–20 to +050 

–10 to +040 

–10 to +050 

–10 to +070 

–10 to +100 

+20 to +090 

+30 to +110 

+20 to +120 

+60 to +130 

+20 to +150 

+50 to +200 

+50 to +250 

+50 to +300 

+50 to +350 

for STW and STB 

Range 

°C 

+30 to +110 

+60 to +130 

+20 to +150 

+50 to +250 

+50 to +300 

Range 

AM 

°C 

+20 to +400 

+20 to +500 

+20 to +500 

12.99/00376440 

Max. probe 

temperature 

°C 

050 

060 

050 

060 

080 

125 

115 

135 

140 

150 

175 

230 

290 

345 

405 

Max. probe 

temperature 

°C 

135 

150 

175 

290 

345 

Table of ranges and probes (gas-filled) 

for TW and TB 

for STW and STB 

Range 

°C 

+20 to +400 

+20 to +500 

+20 to +500 

Max. probe 

temperature 

°C 

460 

550 

550 

Max. probe 

temperature 

°C 

460 

550 

550 

Probe length L in mm for 

probe dia. d in mm (d = 6 is standard) 

5 6 7 8 

179 

201 

268 

268 

196 

146 

196 

175 

146 

191 

117 

137 

099 

083 

067 

128 

141 

185 

185 

138 

107 

138 

125 

106 

135 

088 

101 

073 

063 

053 

101 

110 

140 

140 

108 

086 

108 

099 

086 

106 

073 

082 

060 

053 

046 

085 

092 

115 

115 

091 

075 

091 

084 

075 

090 

065 

072 

054 

049 

043 



5 6 7 8 

155 

168 

105 

088 

074 

112 

121 

080 

066 

058 

090 

096 

068 

056 

— 

078 

082 

061 

050 

— 



5 6 7 8 

— 

217 

300 

278 

148 

202 

203 

113 

150 

158 

092 

119 

probe length L in mm for 


5 6 7 8 

261 

183 

300 

176 

127 

202 

132 

098 

150 

106 

081 

119 


Setpoint adjustment 

setpoint adjusted with screwdriver on setpoint 

spindle against internal scale after 

removing top of case. 

Switch 

for monitors TW, STW (STB): single-pole 

changeover contact. 

for limiters STB und TB: single-pole n.c. 

(break) contact on rising temperature, 

changeover contact at extra cost. 

Current rating 

with differentials 

3%, 5%, 6%, 9% : TW 

5%, 7%, 9% : STW (STB) 

— : TB, STB 

10 (2) A, 230 V AC, p.f. = 1 (0.6) 

0.25 A, 230 V DC 

with differentials 1.5%; TW 

2,5%; STW (STB) 

6 (1.2) A, 230 V AC, p.f. = 1 (0.6) 

0.15 A, 230 V DC 

with Code /au 

0.1 A, 24 V AC/DC 

contact resistance 2.5 — 10 mΩ 

Possible 

capillary length 

[m] 

1 

2 

4 

Possible 

capillary length 

[m] 

1 

2 

4 

Differential 

[%] 

5 

5 

5 

Differential 

[%] 

Differential 

in % of adjustment range 

with liquid-filled measuring system with gas-filled measuring system 

Nominal value Possible actual value Nominal value Possible actual value 

TW 3% 

6% 

standard 

on request 

3 

6 

max. 

max. 

4 

8 

5% 

9% 

standard 

on request 

4 

8 

max. 8,0 

max. 12,0 

1.5% at extra cost 

1 max. 2 

2% at extra cost 

1.5 max. 2.5 

STW (STB) 5% standard 

4 max. 6 

7% standard 

5 max. 12,0 

9% 

2% 

on request 

at extra cost 

8 

1 

max. 11 

max. 3 

9% 

2% 

on request 

at extra cost 

8 max. 16,0 

1.5 max. 3 

7 

7 

7

M. K. JUCHHEIM GmbH & Co 36035 Fulda, Germany Data Sheet 60.3035 Page 3/5 

Switching point accuracy 

(in % of scale span, based on setpoint or 

limit) 

in upper third of scale 

at start of scale 

DIN registration numbers 

ATH . -SW-2 TW 89296 

ATH . -SW-7 TB 89396 

ATH . -SW-20 STW (STB) 89496 S 

ATH . -SW-70 STB 89596 

ATH . -SW-22 TW/TW 90196 

ATH . -SW-27 TW/TB 90296 


Mean ambient temperature error, 

referred to scale span 

12.99/00376440 

+00 

- 05 % 

+00 

- 10 % 

Permitted ambient temperature at 

thermostat head and capillary 

In operation 

maximum: +80°C 

minimum: 

–40°C for end of scale below 200°C 

–20°C for end of scale from 200 — 350°C 

–40°C for end of scale from 350 — 500°C 

ATH . -SW-220 TW/STW (STB) 90396 S 

ATH . -SW-270 TW/STB 90496 

ATH . -SW-2020 STW (STB)/STW (STB) 90596 S 

ATH . -SW-2070 STW (STB)/STB 90696 S 

ATH . -SW-7070 STB/STB 90796 

There is a displacement of the switching point if the ambient temperature at the thermostat 

head deviates from the +22°C calibration temperature. 

higher ambient temperature = lower switching point 

lower ambient temperature = higher switching point 

for end of scale 

below 200°C +200 to +350°C +400 to +500°C 

TW / TB STW (STB) 

STB 


STB 

Permitted storage temperature 

thermostat head, capillary, temperature 

probe 

maximum: +50°C 

minimum: –50°C 

Protection IP65 to EN 60 529 

Operating position unrestricted 


STB 

due to thermostat head, % per °C 

0.08 0.17 0.06 0.13 0.14 0.12 

due to capillary, % per °C per m length 

0.047 0.054 0.09 0.11 0.04 0.03 

Case Material: die-cast aluminium 

Thermostat head mounting 

by 2 screws through base of case (wall mounting), 

for types ATHf-SW- 

capillary exit at bottom of case 

Cable entry Compression gland Pg 11 DIN 46 320 

Capillary and probe End of scale Capillary Probe 

to +200°C 

copper 1.5 mm dia. 

Mat. Ref. 2.0090 

copper Mat. Ref. 2.0090 

brazed 

to +350°C 

copper 1.5 mm dia. 

Mat. Ref. 2.0090 

st. steel Mat. Ref. 1.4571 

brazed 

to +500°C 

st. steel 1.5 mm dia. 

Mat. Ref. 1.4571 

at extra cost 


welded 

to +350°C 

st. steel 1.5 mm dia. 

Mat. Ref. 1.4571 


welded 

Minimum bending radius 5 mm 

Capillary lengths 1 m standard; up to max. 5 m on request


Probe forms and 

pockets to 

Data Sheet 

60.9710 

V-Note 

At present there is 

no restrictive statement 

from the health 

authorities concerning 

any danger to 

health over short 

periods and at low 

concentrations, e.g. 

after fracture of the 

measuring system. 

12.99/00376440 

Models ATHs-SW-.. 

U up to +150°C probe temperature 

Screw-in pocket with fixing screw for securing on case spigot. Male thread ½" pipe with sealing 

shoulder, DIN 3852/2-A, normally brass. 

UZ * above +150°C probe temperature 

with extension so that the maximum permitted ambient temperature +80°C at case is not 

exceeded. Male thread ½" pipe, with sealing shoulder, DIN 3852/2-A, 27 mm a/f, steel. 

Models ATHf-SW-.. 

U Screw-in pocket with fixing screw (clip for clamping the probe). Male thread ½" pipe with sealing 

shoulder, DIN 3852/2-A, 27 mm a/f, normally brass. 

* above +150°C 

Male thread ½" pipe with sealing shoulder, DIN 3852/2-A, 27 mm a/f, steel. 

* Pockets U, UZ: for compressive-load applications above +300°C, material on enquiry ! 

Physical and toxicological properties of the expansion media which may escape in the event of a system fracture! 

Ranges with 

end of scale 

°C 

below +200°C 

+200 to +350°C 

+350 to +500°C 

Connection diagrams 

( 1 ) 

( 2 ) 

( 4 ) 

Dangerous 

reactions 

— 

— 

— 

Fire/explosion hazard Water 

Ignition 

temperature 

°C 

+280 

+490 

— 

Explosion 

limit 

% v/v 

1.2 - 7.5 

1.0 - 3.5 

— 

Code 2, 20 with changeover contact Code 7, 70 with n.c. (break) contact and 

lock-out 

( 4 ) ( 2 ) ( 1 ) 

Code 27, 270 

System I with changeover contact 

System II with n.c. (break) contact and 

lock-out 

( 4 ) ( 2 ) ( 1 ) ( 1 ) ( 4 ) ( 2 ) 

( 1 ) 

( 2 ) 

Code 27, 270 

System I with changeover contact 

System II with changeover contact and 

lock-out 

( 1 ) 

( 2 ) 

( 1 ) 

( 2 ) 

( 4 ) 

( 4 ) ( 2 ) ( 1 ) 

Code 22, 220, 2020 

System I and II with changeover contact 

contamination 

K 

X 

X 

— 

Toxicological data 

irritant danger to 

health 

X 

X 

— 

X 

X 

— 

toxic 

— 

— 

— 

( 1 ) ( 4 ) ( 2 ) 

Code 7, 70 with changeover contact and 

lock-out 

( 1 ) 

( 4 ) ( 2 ) 

( 1 ) 

( 4 ) ( 2 ) 

STB / STB 

Code 7070 

with changeover contact and 

lock-out 

( 2 ) 

( 1 ) 

STB / STB 

Code 7070 


lock-out 

( 1 

( 2


Dimensions 

ATH-SW-.. 

12.99/00376440 

compression gland 

PG 11 

Ordering example 

Single thermostat 

Type : ATHs-SW-2 

Range : 0 to +100°C 

Differential : 3% 

Mounting : U ½" nichrome 

Probe : 8 x 200 mm nichrome 

Double thermostat 

Type : ATHf-SW-270 

Range : +30 to +110°C 

Differential : 3% 

Capillary : 2 m copper 

Mounting : U ½" brass 

Probe : 15 x 150 mm brass 

hex 

ATHs-SW-.. 

compression gland 

PG 11

Thermostats for surface mounting Series ATH-SW - doc-station.ru

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