Press. sensor, esp. capacitive press. sensor for vehicle fuel system - has substrate and membrane carrying electrodes, separated by distance piece and held by elastic clamp

摘要

The press. sensor has a flexible membrane (110) in a housing. The membrane has a flat surface in the unloaded state. A rigid substrate (114) in the housing has a flat surface at a distance from the membrane. The substrate and membrane carry electrodes and are separated by a continuous peripheral distance piece (112). The distance piece holds the membrane and substrate parallel to each other in the unloaded state. The substrate, membrane and distance piece are held together elastically by a clamp (118) so that the electrodes produce a signal which changes with the fluid press. acting on the membrane. USE/ADVANTAGE - Vehicle ic engine fuel system. Capacitive press. sensor design enables effects of mfg. tolerances to be relatively easily compensated.