Digital PID Temperature Controller REX-C900 Thermocouple Input Relay/SSR Output,Output Digital PID Temperature Controller REX-C900 Thermocouple Input Relay/SSR, can be set to K,E,PT100 input, Relay and SSR for your choice, SSR output: 12V, Output, alarm and self-tuning can be indicated by: LED, Alarm function output: 1 way,Default set: K type thermocouple (TC)(M6 Thread), Authentic Guaranteed Authentic Merchandise Shop Enjoy discounts and free shipping! Relay/SSR Output Digital PID Temperature Controller REX-C900 Thermocouple Input.