BTS3 Pipe-Clip Surface Sensors

A range of IP67 rated clip-on temperature sensors for pipe sizes from 13mm~28mm diameter.  The sensor is held in place on the pipe by a powerful spring clip with different clip sizes making them suitable for various pipe diameters.

The NTC sensing element is located in the very tip of the tiny metal housing that allows it to be closely coupled to the metal pipe.  This helps to optimise the thermal response which is typically around 1 second or less.

Other mounting systems are now available to help use this pipe sensor on even bigger pipes upto 100mm diameter.

To read more on how the BTS3 range can protect against Legionaires’ disease click here

Please call us to discuss your application requirements.



  • Gas Boilers
  • Heating and air conditioning systems
  • Instantaneous water heaters
  • Hot water showers
  • Coolant systems
  • Anti-legionnaires systems


    • Fast response design (Tc ≤ 1s)
    • Accuracy ±0.3°C@25°C
    • IP67 rated waterproof housing
    • Clip-on pipes from 13~28mm diameter
    • Operating range up to -20°C to +120°C
    • Excellent long-term stability
    • Available with bespoke fitted leads for ease of fitting and maintenence.


Technical Table header

NTC Thermistor Series ATCS
Temperature Range -20°C/+120°C
Sensor Accuracy Better than ±0.3°C at 25°C
Sensor Material SK7 stainless steel
Connectors 2.8 x 0.5mm terminals