Siemens QAM2030.250 DUCT POINT TEMPERATURE SENSOR, 10K OHM NTC TYPE 2, 8-FOOTSiemens QAM2030. 250 Duct Point Temperature Sensor, 10K Ohm NTC Type 2, 8 FootDuct point temperature sensor with a 10K ohm NTC Type II sensing element. This unit has an 8 foot (2. 4 m) probe and 2 x 4 electrical box housing construction. Additional Information Sensing element10K ohm NTC Thermistor Type II Analog outputs10k Ohm Type 2 Thermistor Measuring range 40 to 180 F Measurement accuracy+ 0. 4F @ 77 F Sensor8 ft Flexible averaging probe Material,