A new level-measurement method is presented. It is based on the acoustic resonance of a waveguide. This method can be successfully implemented for fluid-level measurements in industrial plants, where problems of residues, deposits, foams, etc., can be expected. An experimental gauge has been built and tested under artificially induced residues, foams, deposits, etc. The resonance gauge proves to be insensitive under extreme operating conditions. The proposed method represents an alternative to ultrasonic as well as to some other levelmeasurement methods.
https://www.sciencedirect.com/science/article/pii/S0924424797801161
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