The compact, simple-to-use C.A 1621 thermocouple temperature calibrator
is capable of measuring and simulating up to 8 types of thermocouples (J, K, T, E, R, S, B, N), as well as a voltage in mV.
When used as a battery-powered stand-alone instrument, it offers a long
battery life in the field. When connected to the mains, it can be used
continuously without any time limit.