Siemens 533-376-18Duct Point Temp Sensor, 4-20mA, 20-120F, 18 Inch Rigid Probe
Duct point temperature sensor (single point, rigid) with a 100 ohm platinum RTD sensing element. Temperature range is 20 to 120 degrees Fahrenheit (-7 to 49 degrees Celsius). This unit has an 18-inch (46 cm) probe.