- Dual inductive sensor for pneumatic actuators and valves - Designed for simple fit to common actuators based on VDI / VDE 3845 - Quick and easy installation of the AS-i dual sensor - Position feedback for rising stem valves with up to 80 mm stroke - Reliable permanent valve monitoring In industrial processes where liquids, air or gases are used, valves are needed for dosing and control. Dual inductive sensors provide reliable position feedback for pneumatic valve actuators and valves. They are operated in combination with a switch target (also called 'puck') and detect the "open" and "closed" positions of the valve. Valve sensors provide position feedback on linear valves. The sensors signal up to three important valve positions to the controller: valve open, valve closed and any position in-between, e.g. for the seat lift.