Patent ID: 6539807
Filing Date: 2003-04-01
Classification: F02C

Abstract:
A differential pressure transducer for measuring a pressure differential at different points in a medium, said transducer comprising:a tubular housing having spaced apart first and second medium connections; a piston core having end faces being positioned axially movable within the tubular housing between the first and second medium connections, said core being of a ferromagnetic material and having a stroke range; means for creating a set position given a nominal differential pressure on either end face of the piston core; a primary coil having terminals for an alternating voltage extending coaxially to the piston core and having a length of the stroke range; and at least two secondary coils being telescopically arranged in succession axially, and coaxial to the primary coil, said secondary coils having separate voltage taps so that a differential pressure can be determined from the separate voltages created in the two secondary coils.