The NTM-1 is a replacement for Sigma 9264, Dixson BD, BJ, BS and BL, Prime, VMI/Versatile, YEW Yokogawa Series US1000 and Weschler PC / PH meters. Industry standard housing 1.9”W x 5.7"H x 2"D available in metal only. 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.