22nd September 2021 - COVID Update - the Auckland region is now at alert level 3, and the rest of NZ is at alert level 2.

Under alert level 3, we are able to provide contactless delivery using courier services for all clients and projects in New Zealand.  

To place orders, you can visit our online store or call our team on 0800 333 553 if you have any questions.

Click here for more information about business operations at NZ COVID Alert Level 3

Product Guide

Temperature Probes

There are two types of temperature probes commonly used with KNX sensors - PT1000 and NTC.


PT1000 is a standardised resistance temperature detector and reads 1000Ω at 0°c. If a KNX input uses PT1000 you can use a PT1000 probe from any manufacturer.


NTC, or Negative Temperature Coefficient, probes are not standardised so have different resistance profiles. They are however cheaper to produce and require simpler electronics than PT1000's so are quite common. It is critical to use the manufacturer provided probe if the sensor uses NTC.




  • Zennio - newer products such as the QuadPlus and RailQuad 8 also support 3rd party NTC probes
    • The resistance of the probe at three temperatures points needs to be set in the ETS parameters.





  • Arcus products use standardised PT1000 probe