Connection heads are used to connect temperature sensors and extension wires. They are easy to install, allowing access to the terminal block.

The thermocouple connection or terminal head provides a positive electrical connection between the thermocouple and extension wires and provides a means of attachment for a protecting tube and extension wire conduit. The head contains a terminal block for all electrical connections. Connection heads are available for every application. Typical heads include a cast aluminum cover head, ideal for applications which must be completely weatherproof; a polypropylene head for extreme corrosion areas, explosion-proof conduit type.