Consists of 10-turn potentiometer with temp coefficient of 50 ppm or less and built in power supply; appx dim: lg 5 in.Mon, w 5 in.Nom, h 5 in.Nom; cold surface temp control over ambient temp from 0 to 50 degrees c less than orequal to 0.1 degrees c max; power 4 to 6 volts at 2.5 amps min
