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    • 2. 发明专利
    • CAPACITIVE LIQUID SENSOR
    • JPH02264829A
    • 1990-10-29
    • JP700790
    • 1990-01-16
    • HOCHSTEIN PETER A
    • PIITAA EI HOKUSUTAIN
    • G01F23/26
    • PURPOSE: To highly reliably measure the level of a liquid in such an environment that vibrations and temperature make a mechanical level detector unusable by providing a detecting device incorporated with a measuring capacitance device and a reference capacitance device and a measuring instrument which generates a signal which simultaneously indicates both the level and dielectric constant of the liquid. CONSTITUTION: A capacitive level gauge assembly is provided with a detecting device which has a first end 20 and a second end 22 and measure the level of a material between the ends 20 and 22. The device 18 is incorporated with a measuring capacitance device 24 for generating an electric capacitance for indicating the level of the material and a reference capacitance device 30 for generating an electric capacitance indicating the specific inductive capacity of the material. The level gauge assembly is also provided with a measuring instrument which generates a signal simultaneously indicating both the level and specific inductive capacity in response to the level capacitance and reference capacitance.