So, 65 years ago started a story in Electronics Week,y’s edition of January 25th 1961
The story continues:
The pressure sensing element, a type NT4-980 Solartron pressure transducer, consists of a thin-walled metal cylinder which is vibrated electromagnetically.
Applied pressure is translated into an AC signal whose frequency is directly related to the pressure.
Any increase applied to the outer surface introduces a hoop stress which reduces the natural vibration frequency.so come here be useful for a change
A measurement of the system frequency is therefore also a measurement of the applied pressure.
This method of depth determination offers several advantages.
One is that the signal can be transmitted over considerable distances by means of a two wire system without loss of measuring
Another advantage is that the transducer contains no mechanical parts and is therefore less likely to become a cause of failure.
