The thermocontrol equipment is comprised of PN temp. sensors, operational amplifiers, R-S triggers, numeric display and solid relays. The sensors are interchangeable and can be connected to secondary meters by using ordinary electric wire, maximum measuring distance reaches 200 m, it gives out switching signals and BCD code instantaneous temp. display, the preset temp. is controlled by a single turn potentiometer. It is accurate and stable and is suitable for multiple region temp. control and temp. telemetering in refrigerating or severe vibration environment.