
16 Fundamentals of Sensors for Engineering and Science
In almost all circumstances, the output of a sensor is related functionally
to several variables, such as physical properties and constants, as well as to
its input. For example, the change in capacitance of a capacitive pressure
transducer (see Chapter 2) is related functionally (see Equation 2.27) to the
applied pressure that produces the change in capacitance and to an initial
capacitance, an initial pressure, and to five other physical dimensions or
properties of the transducer. The uncertainty in the measured pressure can
be determined as the uncertainty in a result, where the result is a quantit ...