For Thermocouples - 50.0 0C to 200.0 0C, -50 0C to 1200 0C. RTD PT- 100- 50 0C to 200 0C & -50 0C to 450 0C Automatic cold junction compensation for TC type. ON / OFF or time proportional control by change over contacts or thyristor, single or HI - LOW SET point by potentiometer or thumb wheel switches. Power 240 VAC, 50Hz.