1.ISO9001,CE,RoHS 2popular SOLAR SYSTEM TEMPERATURE CONTROL 3.PID, ON/OFF 4.Alarm, RS485/ ... .MOQ 1 PC AI-708 High Performance Temperature Controller-popular SOLAR SYSTEM TEMPERATURE CONTROL...Ideal for accurate controls of temperature, pressure ... ≤0.8W if no alarm and outputIsolation withstanding voltage :between power, relay contact or signal terminal ≥2300VDC;between isolated electroweak terminals ...