Patent ID: 6670601
Filing Date: 2003-12-30
Classification: G01F

Abstract:
In an apparatus having at least one probe (40, 62) for measuring the level of a liquid in a tank (32, 54), the probe (40, 62) being located in the tank (32, 54) for at least partial immersion in the liquid and being capable of receiving an input signal and providing an output signal in response thereto which can be utilized to determine the amount of liquid in the tank (32, 54), the improvement comprising a fiber optic element (34, 56) for transmitting the input signal to the probe (40, 62), the input signal being a light signal generated externally of the tank (32, 54) by a light source (30, 52) said probe (40, 62) having a photoelectric conversion device (42, 64) for converting the input light signal to an output voltage.