REX-C400 PID Digital Thermostat (SSR Output) — K Thermocouple, 40A SSR Relay, Temperature Calibrating

Compact PID temperature controller with two relays that lets you toggle between cooling and heating operation. Accepts a K thermocouple input and provides SSR output with a 40A SSR relay for reliable switching. The display supports both °F and °C and includes bright, easy-to-read readout plus LED indicators for cooling and power so status is visible even in low light. Built in a rugged plastic enclosure with a convenient hanging tab for simple installation. Temperature is managed by setting a target set value and an adjustable difference (hysteresis) value; the unit also offers temperature calibration and refrigerating control output delay protection to safeguard compressors and systems. Ideal for applications such as refrigeration, fermentation, greenhouse fans and other environments that require precise temperature control.