Anyaki&reg; Dual PID Temperature Controller Thermocouple TD4-SNR Solid State Relay SSR-25 DA Display: Dual display for Fahrenheit(F) and Celsius(C) Range: -1999 to 9999 (depends on the input signal) Input: Thermo Resistor: PT100, Cu50 Thermocouple: J,S,K,E,Wre3 ~ Wre25 Main Output: SSR: Open circuit: 4V, Closed Circuit: 24V 40mA DC