Pressure Detectors
PRESSURE DETECTION CIRCUITRY
Figure 3 Strain Gauge
As the wire grid is distorted by elastic deformation, its length is increased, and its cross-sectional
area decreases. These changes cause an increase in the resistance of the wire of the strain gauge.
This change in resistance is used as the variable resistance in a bridge circuit that provides an
electrical signal for indication of pressure. Figure 4 illustrates a strain gauge pressure transducer.
Figure 4 Strain Gauge Pressure Transducer
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