The duct mounted temperature sensor is a passive resistive sensor. It comes in a variety of probe lengths and optional mounting enclosures. The sensors come with standard accuracy.
| Sensor | Passive, NTC, 2 wire | 
| Thermistor | Thermal resistor | 
| Sensitivity | Approximate @ 32ºF (0ºC) | 
| Lead wire | 22AWG stranded | 
| Wire insulation | Etched Teflon, Plenum rated | 
| Probe | 304 Stainless steel, 0.25” OD | 
| Probe length | 4’, 8’ or per order | 
| Mounting | Extension tabs (ears), 3/16” holes | 
| Duct gasket | 1/4” Closed cell foam (impervious to mold) | 
Malaysia