Inkbird Digital PID Temperature Controller on/off Thermostat Ac 100-240V ITC-100RH with K Sensor Thermocouple Multiple temperature sensors (K, S, Wre, T, E, J, B, N, CU50, PT100) PID and ON/OFF Control Mode with high standard self-adjust function Omron relay inside Self-adjusting function and intelligent control of the instrument to ensure the long-term stability. Accuracy of displaying and controlling 0.1C