What is the principle of pressure sensors?

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  • 6 months ago

    Pressure gauges that I have opened up had a curved metal tube inside. As the pressure in the tube goes up it tends to straighten up. As the tube straightens it moves a toothed rod, which turns a toothed wheel. The wheel turns a needle which indicates the pressure on the face of the guage.

    I m hoping that someone can explain the functioning of a pencil type tire gauge that pops up a metal bar with numbers.

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  • 6 months ago

    A strain gauge on a diaphragm is one common pressure sensor. (electronic tire pressure gauge)

    A bellows with an indicator is another mechanical type. (IE: aneroid barometer.)

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  • 6 months ago

    I know of several types. A granulated carbon where the resistance decreases with increasing pressure.

    A strain gauge where the strain flexes a conductor altering its resistance.

    A diaphram where pressure is applied to a membrane with a spring countering it. The movement is a function of the force on the membrane and the restoring force of the spring.

    I am sure that there are other types too.

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  • oubaas
    Lv 7
    6 months ago

    A membrane deflection proportional to the pressure

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  • 6 months ago

    Pressure gets sensed.

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