Observe the operation of a micropressure sensor and the packaging of a micropressure sensor array. The sensing circuit for the pressure sensor is a Wheatstone Bridge configuration with two variable resistors (strain gauges) that change in resistance with a change in pressure. The sensing circuit is mounted on top of a fixed pressure chamber referred to as the reference chamber. When the pressures above and below the sensing circuit are different, the membrane flexes causing a change in bridge resistance. This animation was produced by the Southwest Center for Microsystems Education (SCME). A supporting learning module - Wheatstone Bridge - can be downloaded from the SCME website (scme-nm.org). Select "Educational Materials".

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