Screw In-Resistance Thermometer TP 12 Hengesbach

The screw-in resistance thermometers Type TP 12 with G ½ B – screw-in threads designed with or without transmitter are high-performance, robust and all-purpose devices for general applications without special hygienic requirements.

The temperature sensor is a PT100 Platinum resistor, standardly designed in accuracy class A according EN 60751. Accuracy classes B 1/2, 1/3, 1/10 DIN or class B are available optionally. The measurement inserts consist of replaceable single- or double-PT100 resistors. The application of the measurement inserts has to be adjusted to the needs for temperature, length, flexibility, vibration-proofness and measuring accuracy. E.g. for control processes and on request devices with tapered tips and extra short half-life-times are available. 

Safety and profitability aspects advise constructions with protective tubes in case of a possibly necessary change of the probes, so that replacements can be carried out quickly and comfortably, without decommissioning the plant or draining the tanks. Furthermore the protectice tube guarantees the resistiveness against mechanical stress and chemical attacks. Also variants of protective tubes to be screwed-in or welded can be designed for a quick response time.


  • "FR"- housing in IP 67
  • with single- or double- PT100
  • CIP-proofed installation with metallic sealing system
  • optional delivery with head transmitter
  • construction with G1/2 B - screw-in thread with replaceable measurement devices


Constructive Layout

Housingfield housing  
Temperature sensorPT 100 acc. EN 60751, changeable measurement insert (standard),  
  insert tube 1.4571 
Measurement insert, electrical1 x PT 100 in 2-, 3- or 4-wire connection, standard: 1 x 3-wire connection,  
  2 x PT 100 in 2- or 3-wire connection 
Electrical connection- M16 x 1,5 – cable gland, MS nickel-plated,  
 - optional: M12 x 1 circular connector, 4-pins  
Accuracy- standard: tolerance class A acc. to EN 60751,  
 - optional:tolerance class B 1/10, 1/5, 1/3, 1/2DIN
Response timeT50 (measured in water): 6 sec. (dependent on design, d = 6 mm)  
  < 4 sec. with tapered sensor tip on request 
Measured medium temperatureTmax at sensor = -20... +200°C  
Housing materialstainless steel 1.4301 (CrNiSt, standard-field housing)  
Sensor materialstainless steel 1.4571, optional 316L = 1.4435 or 1.4404,  
  optional: enhanced surface quality 
Sensor diameterstandard:continuously plain, d = 6 mm, 
 optional:tapered sensor tip, d = 4 mm(measurement insert replaceable)
  tapered sensor tip, d = 3 mm or 2 mm(measurement insert not replaceable)
Sensor lengthinsertion length IL = 100 mm (standard)  
Protection classEN 60529,IP 67 with cable gland, optional with cable connection 
Pressure admissiblePN = 10 bar, dependent on design and temperature  
CE-conformity EMC-rules are accomplished, CE-sign 

Process Connection

  G ½ B – screw-in thread with d = 6 mm 
  G ½ B – screw-in thread with d = 9 mm 


Assembly components- zem / T327:  
 welded protection sleeve, d = 9 mm, 1.4571, by PN 40,  
 acc. drawing no. 062164, for fitting lengths 25 mm...100 mm (lengths > 100 mm, on req.)  
 - zem / TP12:  
 screw-in protection sleeve, d = 9 mm or 11 mm, 1.4571, by PN 40,  
 acc. drawing no. 05895, for fitting lengths 30 mm...100 mm(lengths > 100 mm, on req.) 


Electrical connectionceramic connection socket  
 flexible connecting wires  
 sheathed cable (shakeproof type)  
 transmitter TE 42, programmable, 4...20 mA, 2- wire connection (standard)  
 transmitter TE 41, programmable, galvanically isolated  
 transmitter TE 52, HART  
 transmitter TE 82, Profibus PA  
Calibrationfactory calibrated, calibration certificate (3-point or 5-point),with DKD-standard 
Certificatesmaterial certificate, acc. to EN 10204, EHEDG,FDA 

Download Data Sheet: Screw In-Resistance Thermometer TP 12