A transducer is a device which senses a non-electrical quantity and converts it into a proportionate electrical quantity for measurement.
Advantageous of Electrical Transducers
Classification of Transducers
Transducers may be classified in different ways viz according to their application, method of energy conversion, the nature of the output signal and soon. On the basis of power utilized by them for operation, they may be classified as active transducers and passive transducers.
The transducers which generate their own power for their operation are known as active transducers. In these transducers, a voltage or current are produced proportional to the measurand.
Examples of active transducers
The transducers which need an external source of power for their operation are known as passive transducers. In these transducers, a variation in some electrical parameter is produced, which in turn can be measured as a voltage or current.
Examples of passive transducers