Accurate remote sensing or control of liquid levels is of interest in a variety of applications. A method capable of distinguishing between the presence and absence of liquid at a discrete level by monitoring the rate of heat transfer from a solid-state sensing element is discussed; a detailed description is given of the silicon sensor and the associated electronic circuitry. Small size (0.50 × 0.50 × 0.15mm3) and low thermal conductance mounting of the active element assure precise level determination and rapid response, while an auto-referencing scheme used in the circuit permits reliable operation over a wide temperature range. Three versions of the system are described, each suited for different types of level sensing applications. Suggested among the possible uses are a number of automotive applications such as crankcase, transmission, and brake fluid measurements.


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    Title :

    Solid-State Automotive liquid level Sensing System


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    1980 Automotive Engineering Congress and Exposition ; 1980



    Publication date :

    1980-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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