Fix the target magnet on the valve stem and obtain the valve position status by detecting the movement of the valve stem, including linear valves, such as isolation, gate, globe, diaphragm valve, etc.; quarter turn valves, such as butterfly, ball, plug, safety, check valves, etc., and ventilation devices. The indicator and target can be installed face-to-face or face-to-side. We can provide customized target magnets based on the required sensing distance, direction of motion, installation space, etc.