An electric manometer for pressures up to 3000 atmospheres
A. M. J. F. Michels, M Lenseen · Journal of Scientific Instruments · 1934
The construction of a differential electric manometer depending upon the variation of resistance of manganin coils with pressure is described. A special form of plug resistance is employed in the bridge circuit, whereby the number of plugs in use is always the same, thus decreasing variation due to contact resistance.