PRESSURE SENSOR WITH ACTUATOR BETWEEN DIAPHRAGM AND TRANSDUCER

摘要

Disclosed is a pressure sensor, for example for a domestic central heating boiler, comprising a rolling diaphgram (15) that adjusts its position in dependence upon the fluid pressure admitted through a pressure port (5). The diaphgram acts against an actuator (7) which adjusts the position of a wiper (20) of a thick film potentiometer, to provide an output voltage in dependence on the admitted fluid pressure. The potentiometer may be calibrated at the factory by rotating an adjustment cap (11) of the actuator (7), which has claw-like projections in engagement with outward projections of part-helical form on a body part (8) of the actuator. There is a one-to-one axial position relationship between the actuator (7) and the wiper (20).