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Pressure Sensors — WSU

Pressure Sensors — WSU - Pressure Sensors...

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Pressure Sensors There are various pressure sensors used on vehicles: Air Conditioning Pressure Sensor - An AC pressure sensor is used to measure the high side pressure while the engine is running. The sensor uses a flexible diaphragm with a strain gauge attached to it to measure differences in pressure. A strain gauge is a device that changes resistance in response to a physical bending of the gauge. Manifold Absolute Pressure (MAP) sensor, Barometric Pressure (BARO) sensor, and Turbo Boost Sensor - These are devices that use a flexible diaphragm with a strain gauge attached to it to measure differences in pressure between atmospheric pressure and the air pressure in the intake manifold (MAP) or a fixed pressure gas chamber (BARO) A strain gauge is a device that changes resistance in response to a physical bending of the gauge. A MAP sensor is used by most gasoline engines. A BARO sensor is used by advanced diesel engines.
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