Pressure measuring device and manufacturing method for a pressure measuring device
2008
The invention relates to a pressure measuring device having a housing (10h) having at least one manufactured at least partially of an insulating material separating wall (42a) which has an internal volume of the housing (10h) at least in a measurement chamber (20) and in an insulating chamber (22) is divided; arranged at least one in the measuring chamber (20) resonant circuit with a capacitor (36) having a pressure-dependent capacitance; coupled one within the isolating arranged (22) the evaluation circuit (24) and a to the evaluation circuit by means of a conductive contact member (24) the primary coil (26), wherein the evaluation circuit (24) is adapted by means of a current supply to the primary coil (26) the resonant circuit to stimulate in the measuring chamber (20) and to determine a dependent of the pressure-dependent capacitance resonant frequency of the resonant circuit and to provide, so that the pressure in the measuring chamber (20) is determined by means of an evaluation of the dependent from the pressure-dependent capacitance resonant frequency of the resonant circuit. Furthermore, the invention relates to a manufacturing method for such a pressure measurement device.
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