... Relays and Thermocouples. PID temperature controller / PID process control thermostats We specialize in manufacturing Temperature Controllers,thermostat,Humidity Controllers ... , Refrigeration Controllers,Digital Time Relays and Thermocouples. PID fuzzy control, P, PI, PD, PID, or on/off,multi ... P, PI, PD, PID, or on/offAlarms Upper limit alarm, lower limit alarmWorking temperature 0 to 50 °C (32 ...