The Electrical Measurement of Pressures and Indicator Diagrams
E. J. B. Willey · Journal of Scientific Instruments · 1946
A brief discussion is given of the various methods for electrical measurement of pressure. Apparatus of a simple kind is then described, with working details, ( a ) for two pressure condensers, ( b ) for a capacity-coupled amplifier usable down to 5 c/s, ( c ) for a direct-coupled cathode-follower circuit and ( d ) for special non-linear time bases to convert pressure-time curves into indicator diagrams.