The Type 3738 electronic valve position monitor is a contactless, magneto-resistive sensor system that works with a Namur signal in compliance with IEC 60947-5-6 and is powered by a two-wire supply. As a result, the positioner can replace existing solenoid valves and limit switches without the time-consuming process of changing wiring or signal levels. The device also includes functions such as self-tuning and diagnostics, which opens up a range of opportunities for control and asset management. The air supply for the actuator is routed through bores at the bottom of the housing, making additional tubing unnecessary. — Samson Controls, Redhill, U.K.