I want to use a DP45 differential pressure sensor in a researching project, Does anyone knows the exact information about the electrical features of the sensor, especially the Inductance-Pressure relation. I couldn’t get anything that how Inductance changes for a different pressure values.
Validyne transducers do involve changes in inductance of the coils, but the values of inductance are actually irrelevant to users. The transducer coils are normally connected in a (half) bridge configuration, so it is only the ratios of inductance that are significant. To a user, the important number is the (change in) voltage appearing at the junction of the two coils, which is normally given as “millivolts per volt (of excitation) at full scale” or a similar unit. Validyne transducers normally have 20-40 mv/v outputs at full scale. The exact value is determined for a particular transducer by calibration.
As a matter of information (and normally of no significance to a user) the inductance of Validyne transducer coils is usually around 20 mh.