The NT-TEMP advanced remote temperature sensor can be used as an INDOOR sensor or an AUX1, AUX2, or AUX3 sensor, using the on-board temperature sensor. When being used as an INDOOR sensor, up to six (6) NT-TEMP sensors can be automatically averaged. Additionally, by adding any one of several temperature probes, the NT-TEMP can be adapted to work in a supply air or return air duct, walk-in freezers, refrigeration cases, computer rooms, outdoor, and water (pvc pipe). They are specifically designed to work in with the NetX HVAC thermostat family. Screwless terminal connections are standard on the sensor. The unit is connected to the Net/X thermostat for power and data. THE NT-TEMP can be used with GExx and HPxx thermostats ONLY as INDOOR or OUTDOOR sensor. The AUX1, AUX2 AND AUX3 sensor features are only available with the UP32 thermostats.