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WIKA · Temperature measurement · Family TRU

Miniature resistance thermometer for connection to WIKA radio unit

Miniature resistance thermometer for connection to WIKA radio unit, model NETRIS®3, intrinsically safe, IIoT-capable, with integrated transmitter for remote monitoring.
Range
-196…500 °C
Output
Unified WIKA interface (UWI)
Accuracy
±1.9 K (≤ 300 °C)
Protection
IP66/IP67
CERoHSATEXIECExII 1D Ex ia IIIC * DaII 1/2D Ex ia IIIC * Da/DbII 2D Ex ia IIIC * DbII 1G Ex ia IIC T1 - T6 GaII 1/2G Ex ia IIC T1 - T6 Ga/GbII 2G Ex ia IIC T6 GbII 2G Ex ia IIC T1 - T6 GbII 1G Ex ia IIC T1-T6 GaII 1/2G Ex ia IIC T1-T6 Ga/GbII 2G Ex ia IIC T1-T6 Gb
Price
On request
Depends on configuration
Request a quote
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Description

The model TRU miniature resistance thermometer in combination with the model NETRIS ® 3 radio unit is used wherever web-based remote monitoring of the process pressure is desired. Condition-based and preventive maintenance through centralised big data analysis is thus possible.

Resistance thermometers in this series can be installed directly into the process or combined with a large number of thermowell designs. Surface temperature measurements, e.g. on a tubeskin, can be performed using a tightening strap. The instruments are intrinsically safe and suitable for use in hazardous areas.

for further approvals, see page 5

Special features

  • IIoT-capable measuring instrument in combination with WIKA radio unit, model NETRIS ® 3
  • Sensor range from -196 ... +500 °C [-321 ... +932 °F]
  • For direct installation into the process or common thermowell designs
  • Intrinsically safe version Ex i
  • Very compact design
Identification
ModelTRU
SubcategoryMiniature resistance thermometer with integrated transmitter
Measuring range
Temperature ranges−196…+300 °C · −50…+300 °C · −50…+500 °C
Accuracy
Accuracy class±1.9 K (≤ 300 °C), ±2.9 K (> 300 °C)
Process conditions
Process connection
M12 x 1.5M20 x 1.57/16-20 UNF-2AwithoutM24 x 1.5 female thread, spring-loaded sensorG ¼ BG ⅜ BG ½ B¼ NPT½ NPTG ¼ B compression fitting (metal ferrule)G ⅜ B compression fitting (metal ferrule)G ½ B compression fitting (metal ferrule)¼ NPT compression fitting (metal ferrule)½ NPT compression fitting (metal ferrule)G ¼ B compression fitting (PTFE ferrule)G ⅜ B compression fitting (PTFE ferrule)G ½ B compression fitting (PTFE ferrule)¼ NPT compression fitting (PTFE ferrule)½ NPT compression fitting (PTFE ferrule)G ⅜ union nut, spring-loaded sensorTightening strap7/16-20 UNF-2A with O-ringM24x1.5 female thread1/4 NPT1/2 NPTCompression fittingSpring-loadedTubeskin with tightening strap
Process temperature−196…+500 °C
Electrical characteristics
Output signalUnified WIKA interface (UWI) · Digital interface (UWI)
Electrical connectionM12 x 1 circular connector
Materials
Probe material1.4435 (316L), Stainless steel 1.4571 (316 Ti), Stainless steel 1.4435 (316L), 1.4571 (316 Ti)
Thermowell material1.4571 (316 Ti), 1.4435 (316L)
Operating environment
Ambient temperature−40…+105 °C
IP ratingIP66/IP67
Weight0.05 kg
Certifications and approvals
Certifications
CERoHSATEXIECEx
Explosion protection
II 1D Ex ia IIIC * DaII 1/2D Ex ia IIIC * Da/DbII 2D Ex ia IIIC * DbII 1G Ex ia IIC T1 - T6 GaII 1/2G Ex ia IIC T1 - T6 Ga/GbII 2G Ex ia IIC T6 GbII 2G Ex ia IIC T1 - T6 Gb
Additional details
Sensor typePt100
Probe length50 mm
Probe diameter3 mm
ThermowellNo
Thermowell formfabricated
Datasheet languagesEN, DE
Tables from datasheet
Process connection
Type of process connection■ G¼B ■ G⅜B ■ G½B ■ ¼NPT ■ ½NPT ■ M12 x 1.5 ■ M20 x 1.5 ■ 7/16-20 UNF-2A ■ without ■ G¼Bcompression fitting (metal ferrule) ■ G⅜Bcompression fitting (metal ferrule) ■ G½Bcompression fitting (metal ferrule) ■ ¼4 NPT compression fitting (metal ferrule) ■ ½NPTcompression fitting (metal ferrule) ■ G¼Bcompression fitting (PTFE ferrule) ■ G⅜Bcompression fitting (PTFE ferrule) ■ G½Bcompression fitting (PTFE ferrule) ■ ¼NPTcompression fitting (PTFE ferrule) ■ ½NPTcompression fitting (PTFE ferrule) ■ G⅜union nut, spring-loaded sensor (for additional thermowell) ■ M24 x 1.5 female thread, spring-loaded sensor (for additional thermowell / neck tube)
Sensor
Sensor diameter■ 3 mm[0.12 in] ■ 6 mm[0.24 in]
Insertion length 1)■ 50 mm[1.97 in] ■ 75 mm[2.95 in] ■ 100 mm[3.94 in] ■ 120 mm[4.72 in] ■ 150 mm[5.91 in] ■ 200 mm[7.87 in] ■ 250 mm[9.84 in] ■ 300 mm[11.81 in] ■ 350 mm[13.78 in] ■ 400 mm[15.75 in] Other insertion lengths on request
Digital interface
Signal typeUnifiedWIKA interface (UWI)
Digital signal resolution10mK
Connection typeM12 x 1 circular connector, pin assignment suitable for use withWIKA radio unit model NETRIS ® 3
AccuracyOverall accuracy incl.WIKA radio unit (NETRIS ® 3): ■ Measuring range ≤ 300 °C: +/- 1.9 °K ■ Measuring range > 300 °C: +/- 2.9 °K
Material
Materials (wetted)
Sheath material■ Stainless steel 1.4571 (316 Ti) ■ Stainless steel 1.4435 (316L)
Process connection■ Stainless steel 1.4571 (316 Ti) ■ Stainless steel 1.4435 (316L)
Operating conditions
Ambient and storage temperature range-40 ...+105 °C [-40 ...+221 °F]
Version with FKM O-ring -20 ...+105 °C [-4 ...+221 °F]
Climate class per IEC 60654-1Cx (-40 ...+105 °C [-40 ...+221 °F], 5 ... 95 %r.h.)
Version with FKM O-ring: -20 °C [-4 °F]
Maximum permissible humidity, condensation100 %r.h., condensation allowed
Maximum operating pressure 1) 2)
With sensor diameter 3 mm[0.12 in]140 bar [2,030 psi]
With sensor diameter 6 mm[0.24 in]270 bar [3,916 psi]
Salt mistIEC 60068-2-11
Vibration resistance per IEC 6075110 ... 2,000 Hz, max. 10 g amplitude / 20 g peak-to-peak 3)
Shock resistance per IEC 60068-2-2750 g, 6 ms, 3 axes, 3 directions, three times per direction
Ingress protection (IP code)
Case with connected connector■ IP66 per IEC/EN 60529 ■ IP67 per IEC/EN 60529
The stated ingress protection only applies when plugged in using line connec- tors that have the appropriate ingress protection.
Coupler connector, not connectedIP67 per IEC/EN 60529
WeightApprox. 0.05 ... 0.7 kg [0.11 ... 1.54 lbs] - depending on version
View all (8)
Hazardous gas atmos- phereTemperature classAmbient temperature range (T a )Process temperature
II 1G Ex ia IIC T1 - T6 Ga II 1/2G Ex ia IIC T1 - T6 Ga/Gb II 2G Ex ia IIC T1 - T6 GbT6-40 ...+50 °C [-40 ...+122 °F]-196 ... +72.5 °C [-321 ...+163 °F]
T5-40 ...+75 °C [-40 ...+167 °F]-196 ... +87.5 °C [-321 ...+190 °F]
T4-40 ...+105 °C [-40 ...+221 °F]-196 ... +122.5 °C [-321 ...+253 °F]
T3-40 ...+105 °C [-40 ...+221 °F]-196 ... +187.5 °C [-321 ...+370 °F]
T2-40 ...+105 °C [-40 ...+221 °F]-196 ... +282.5 °C [-321 ...+541 °F]
T1-40 ...+105 °C [-40 ...+221 °F]-196 ... +432.5 °C [-321 ...+811 °F]
Hazardous dust/air atmos- pheresTemperatur class / maximum surface temperatureAmbient temperature range (T a )Process temperature
II 1D Ex ia IIIC * Da II 1/2D Ex ia IIIC * Da/Db II 2D Ex ia IIIC * DbT135 °C T 200 xxx °C-40 ...+100 °C [-40 ... 212 °F]-196 ... xxx °C - 9 K 1)
LogoDescriptionRegion
EU declaration of conformityEuropean Union
RoHS directive ATEX directive Hazardous areas -
Ex i Zone 0 gas Zone 1 mounting to zone 0 gas Zone 1 gas Zone 20 dust Zone 21 mounting to zone 20 dust Zone 21 dustII 1G Ex ia IIC T1 ...T6 Ga II 1/2G Ex ia IIC T1 ...T6 Ga/Gb II 2G Ex ia IIC T1 ...T6 Gb II 1D Ex ia IIIC * Da II 1/2D Ex ia IIIC * Da/Db II 2D Ex ia IIIC * Db
IECEx - in combination with ATEX Hazardous areasInternational
- Ex i Zone 0 gas Zone 1 mounting to zone 0 gas Zone 1 gas Zone 20 dust Zone 21 mounting to zone 20 dust Zone 21 dustEx ia IIC T1 ...T6 Ga Ex ia IIC T1 ...T6 Ga/Gb Ex ia IIC T1 ...T6 Gb Ex ia IIIC * Da Ex ia IIIC * Da/Db Ex ia IIIC * Db
DescriptionRelevant data sheetFurther information
NETRIS ® 3 radio unitAC 40.03on request