Bare Bead Thermocouples use with ROI-TTC 4-20mA TC transmitters or D TC input modules, easy to use stripped leads connect with a screwdriver. The ROI-TTC Bare Bead Thermocouples allow connection to your thermocouple measurement system with a simple screwdriver. The connection lead can be extended in the field as needed using 2 wire cable and standard thermocouple connectors. The length of the wiring is 60 inches. Bare Bead Thermocouples are simple to connect.