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WIKA · Temperature measurement · Family TWG

Gas-actuated temperature switch

Stainless steel switch enclosure
Range
-30…600 °C
Output
SPDT · DPDT
Accuracy
≤ 0.5 % of span
Protection
IP66
CEEACRoHSREACHKOSHAEx ia I MaEx ia IIC T6/T4 GaEx ia IIIC T85/T135 Da
Price
On request
Depends on configuration
Request a quote
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Description

These high-quality and robust temperature switches have been developed especially for safety-critical applications. The high quality of the products and manufacturing in accordance with ISO 9001 ensure reliable monitoring of your plant. In production, the switches are traced by quality assurance software at every step and subsequently are 100 % tested.

In order to ensure as flexible operation as possible, the temperature switches are fitted with micro switches, which enable the switching of an electrical load of up to AC 250 V, 20 A directly.

For lower switching power ratings, such as for PLC applications, argon gas-filled micro switches with gold-plated contacts can be selected as an option.

Special features

  • Electropolished case
  • Ingress protection IP 65, NEMA 4
  • Ambient temperature -40 ... +85 °C
  • 1 or 2 independent switch points, high contact rating up to 15 A/AC 250 V
  • Directly connected or via capillary (up to 10 m capillary)
Identification
ModelTWG
SubcategoryTemperature switch
Measuring range
Temperature ranges−30…+70 °C · +0…+100 °C · +0…+160 °C · +0…+250 °C · +0…+400 °C · +0…+600 °C
Accuracy
Accuracy class≤ 0.5 % of span
Safety integrity level (SIL)SIL 2
Process conditions
Process connection
½ NPT male¾ NPT maleG ½ A maleG ¾ A male¾ NPT, maleG ½ A, maleG ¾ A, male
Process temperature−40…+600 °C
Electrical characteristics
Output signalSPDT · DPDT
Electrical connection½ NPT female
Materials
Probe materialstainless steel 316L, stainless steel, stainless steel (AISI 304)
Operating environment
Ambient temperature−40…+85 °C
IP ratingIP66
Weight2.2 kg
Certifications and approvals
Certifications
CEEACRoHSREACHKOSHA
Explosion protection
Ex ia I MaEx ia IIC T6/T4 GaEx ia IIIC T85/T135 Da
Additional details
Sensor typegas-actuated
Sensor classSAMA class III B
Probe length145 mm
Probe diameter12 mm
ThermowellNo
Datasheet languagesEN, DE
Tables from datasheet
Contact versionElectrical rating (resistive load)Suitable for Ex ia option
ACDC
UN1 x SPDT, silver250 V, 15 A24 V, 2 A, 125 V, 0.5 A, 220 V, 0.25 ANo
US1 x SPDT, silver, hermetically sealed, argon gas filling 2)250 V, 15 A24 V, 2 A, 220 V, 0.5 AYes
UO1 x SPDT, gold-plated, hermetically sealed, argon gas filling 2)125 V, 1 A24 V, 0.5 AYes
UG1 x SPDT, gold-plated125 V, 1 A24 V, 0.5 ANo
UR1 x SPDT, silver, adjustable dead band250 V, 20 A24 V, 2 A, 220 V, 0.5 AYes 3)
DN2 x SPDT or 1 x DPDT, silver250 V, 15 A24 V, 2 A, 125 V, 0.5 A, 220 V, 0.25 ANo
DS2 x SPDT or 1 x DPDT, silver, hermetically sealed, argon gas filling 2)250 V, 15 A24 V, 2 A, 220 V, 0.5 AYes
DO2 x SPDT, or 1 x DPDT gold-plated, hermetically sealed, argon gas filling 2)125 V, 1 A24 V, 0.5 AYes
DG2 x SPDT or 1 x DPDT, gold-plated125 V, 1 A24 V, 0.5 ANo
Maximum values
Voltage U iDC 30V
Current l i100mA
Power P i0.75W
Internal capacitance C i0 μF
Internal inductance L i0mH
Stem diameter ∅DinmmActive length X inmmInsertion length Y inmm
12 (standard)85145 1)
9.5 (option)135195 1)
Setting rangeWorking rangeProof temperatureFixed dead bandAdjustable dead band
in °Cin °Cin °C1 contact, UN, US, UO, UG in °C2 contacts, DN, DS, DO, DG in °C1 contact, UR in °C
-30 ... +70-40 ...+70120≤ 4.5≤ 4.515 ... 35
0 ... 100-40 ...+100120≤ 4.5≤ 4.515 ... 35
0 ... 160-40 ...+160190≤ 5≤ 518 ... 35
0 ... 250-40 ...+250300≤ 6≤ 621 ... 45
0 ... 400 1)-40 ...+400500≤ 10≤ 1033 ... 77
0 ... 600 2)-40 ...+600600≤ 17≤ 1750 ... 115
View all (6)
LogoDescriptionCountry
EC declaration of conformity ■ Low voltage directive 2006/95/EC, EN 60730-1 ■ ATEX 1) directive 94/9/EC; annex III, IV (option) IM1 II1GDEuropean Community
IECEx 1) per IEC 60079-0, IEC 60079-11, IEC 60079-26 (option) Ex ia I Ma Ex ia IIC T6/T4 2) Ga Ex ia IIIC T85/T135 2) DaIECEx member states
EAC (option) Hazardous areas (option)Eurasian Economic Community
KOSHA (option) Hazardous areasSouth Korea
LogoDescription
SIL 2 rating (option) , per IEC 61508 Functional safety The electrical rating for DC applications is limited to 30V ...100mA