PRESSURE DETECTION CIRCUITRY
Capacitive-type transducers, illustrated in Figure 9, consist of two flexible conductive plates and
a dielectric. In this case, the dielectric is the fluid.
Figure 9 Capacitive Pressure Transducer
As pressure increases, the flexible conductive plates will move farther apart, changing the
capacitance of the transducer. This change in capacitance is measurable and is proportional to
the change in pressure.