Current to pressure transducer with magnetic fluid

The paper presents a new type of current-to-pressure transducer that consists of a ferromagnetic nozzle and an electromagnetic actuator with two diaphragms and a magnetic fluid, which ensures a correspondence between the air line pressure and the control current in the coil. The experimental results obtained in stationary steady-state show that by a suitable choice of the technical parameters, transfer characteristics with low hysteresis effect may be obtained, the dependence pressure versus current being practically linear.