Patent ID: 9222824
Filing Date: 2015-12-29
Classification: G01F

Abstract:
1. A sensor system for determining the position of a gas-liquid interface comprising: a light source; a plurality of photo detectors capable of detecting reflections of light from said light source from the gas-liquid interface and providing a signal responsive thereto, said photo detectors being positioned at known, spaced apart distances from said light source, wherein each photo detector comprises: a light detector; and a beam splitter joined to said light detector, said beam splitter being positioned to receive reflections of light from the gas-liquid interface, and said beam splitter being capable of splitting the received reflection into an additional reflection toward said gas-liquid interface and a refraction directed toward said light detector; and a processor joined to said plurality of photo detectors to receive the signals therefrom, signals from and positions of said plurality of photo detectors allowing said processor to determine the position of the gas-liquid interface between said light source and one said photo detector.