81921501 is a miniature pneumatic position detector featuring a simple plunger actuator design for precise position sensing in industrial automation. This 100% pneumatic, all-metal device operates within a pressure range of 0.1 to 8 bar and delivers a flow rate of 200 Nl/min at 6 bars with an orifice diameter of 2.7 mm. The detector features a normally closed (NC) circuit function, requires an actuation force of 18 N at 6 bars, and operates reliably across a temperature range of -5°C to +50°C. With a mechanical life exceeding 10 million operations and a zamak body construction, this detector is designed for demanding industrial environments requiring durable and reliable position detection solutions.