Displacement and tilt transducers of 140 dB range
Frank D. Stacey, John M. W. Rynn, E C Little, C Croskell · Journal of Physics E Scientific Instruments · 1969
Use of a ratio transformer bridge for comparison of capacitances in a differential capacitance transducer gives a seven figure bridge reading which is linear in displacement or tilt. Principal application is to a portable tiltmeter reading to 10 −9 rad with a range of 10 −2 rad.