Pneumatic Position Sensor
Original Publication Date: 1984-Sep-01
Included in the Prior Art Database: 2005-Feb-05
This pneumatic position sensor can be made entirely from molded, non-metallic materials and is usable to indicate the position of a movable part in an environment, such as electromagnetic compatibility testing, in which no metallic parts or wires are permissible. Fig. 1 shows a top view of the sensor, while Figs. 2, 3 and 4 show sectional views. In Fig. 2, a piston B is movable within a cylindrical cavity of sensor body C. Body cap D, held in place by mounting screws E, retains piston B within the cylindrical cavity of body C. Three "O" ring seals separate and define three segments of piston B. Mounting holes G are provided in the base of sensor body C. In Fig. 4 air pressure is applied to port P1 which forces piston B to the upwardmost position shown.