The NTM-V housing is a replacement for any Versatile, Sigma or VMI 9200 Series meter. Industry standard 2.06"W x 4.06”H metal housing. This unit houses up to 2 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.