The NTM-A is a replacement for any 1/4 DIN analog or digital meter. Industry standard housing 3.78"W x 3.78"H x 3”D (1/4 DIN) available in plastic or metal. Available in up to 3 channels, this Bar-Digital meter/controller is loop (4-20mA), A.C. signal or externally powered 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.