Interface Microsystems offers AC Controllers with External Temperature Display. Interface Microsystems is an ISO 9001:2000, ISO 14001 and ISO/ TS 16949:2002 registered organisation. Interface Microsystems supplies a range of automotive electronics. The AC Controllers with External Temperature Display controls compressor when AC switch on, temperature sensing using thermistor sensor, fixed / adjustable temperature setting, temperature adjustable using external potentiometer, low engine RPM cut-off, short time cut-off sensing pedal switch, and high coolant temperature cut-off.