A thermocouple is a sensor that measures temperature. This type of sensor consists of two different types of metals that when welded together create a junction and small voltage which is then read by an indicator or control.  Glas-Col offers thermocouples in various types, diameters and probe lengths. 

Type J: is the most frequently used thermocouple, and it consists of a positive (Iron) and a negative (Constantan) leg.

Type K: is more accurate at high-temperatures, and it consists of a positive (Chromel) and a negative (Alumel) leg.

Type T: maintains stable resistance to decomposition in most environments as well as high-stability in sub-zero temperatures and consists of a positive (Copper) and a negative (Constantan) leg.

Contact customer service for PTFE coated probes.