The NTM-3 is a replacement for General Electric / Yokogawa DB40. Industry standard housing 4.35"W x 4.35"H x 2"D switchboard available in plastic or metal. This unit houses up to 3 channels and is available in loop (4-20mA), A.C. signal or external power to replace fit, form and function any analog or digital panel meter. Our Powerless (loop/signal) versions only consume <60mW, comparable to an analog meter! The external power series features over 30 signal conditioners.