BTS4 Push-Fit Temperature Sensors

A range of push-fit/clip-in temperature sensors in brass housings fitted with integral o-rings.  The push-in sensor /probe is held in situ by a circlip which makes them suitable for use in polymer composite heat exchangers in district heating systems.

This sensor design is perfect for polymer heat exchangers where a screw-threaded boss sensor would not withstand the high fluid pressures involved.  The sensors can be fitted with a range of NTC thermistors or platinum RTD Pt100 or Pt1000 elements.

Various industry standard connectors or integral lead-wires are available.



  • Gas boilers
  • Heating and air conditioning systems
  • Coolant systems
  • District heating systems


  • Push-fit design for plastic heat exchangers
  • Fast response time (Tc<3s)
  • Accuracy ±1°C or better
  • Operating range up to -40°C/+140°C
  • NTC thermistor or Pt100/Pt1000 elements


Technical Specifications

NTC Thermistor Series AT-2, ATC3, ET, NT, ATCS, SP
Temperature Range -40°C/+140°C
Sensor Accuracy R25±1% as standard, others available
Sensor Material Nickel-plated brass, brass, stainless steel
Lead Wires Integral lead-wires are an option
Connectors Lumberg 2.5 MSF, Tyco Modu, etc