Abstract: An electrohydraulic device is suggested for continuously monitoring the pressure in a hydraulic brake system for automotive vehicles, in particular for outputting electric control signals in dependence upon applied pressure signals, the said device being composed of a housing containing two coaxial bores, a receiver arranged in the housing and applicable by the inlet pressure, as well as a converter for converting the hydraulic pressure into an electric output signal.To devise a structurally simple, reliable device of cost-efficient manufacture, the instant invention provides that the receiver is formed of a membrane made of amorphous metal with changing permeability which coacts with a coil system used as a converter, the output signals of which can be supplied to an evaluating electronic system.