Ranco 1309007-044 Temperature Sensor. This can be used for air, duct or spot sensing. It can also be used in bulb wells for immersion applications. For use with Ranco ETC Series Controllers. Specs: Length (In.): 96, Diameter (In.): 1-3/8, Operating Temp Range (F): -30 to 220, Display Temp Range (F): -30 to 220, 1 K, Input Voltage: 24 to 240V, Sensor Type: Thermistor.