Introduction An important function in the industrial and scientific use of electronics is the measurement of physical parameters such as position, temperature, force, pressure and the rate of flow of fluids. Electronic circuits operate only with the inputs currents or voltages. Therefore, physical parameters needs to be converted into voltages and currents. The device for that purpose is called transducer. 4
The transducer is any device that converts energy in one form energy to another form.
The majority either converts electrical energy to mechanical displacement or converts non electrical physical quantity (temperature, sound, light etc to an electrical signal. In electronic instruments, the second conversion is of primary interest. 5
