The ADT220 is a highly integrated loop calibrator featuring several patented technologies, the calibrator is an ultra-compact, rugged, and best of all, easy to use hand-held device that will source, simulate and measure loop current, mV/V, loop integrity, and also perform switch testing. Its smart phone-like menu and interface makes it simple and easy to use. The ADT220 is ideal for calibrating, maintaining, and troubleshooting various loop devices in the field.