An ideal transducer should show high linearity. A linear system should produce exact output according to input.

The name self-generating transducer is due to its property of working without the use of external power.

Piezo-electric crystals produces an electric signal when pressure applied. Examples are quartz, Rochelle salt. That is, it converts force into electric signals.

Analog transducers convert physical quantity to analog signals while digital transducers convert physical quantity to digital signals. Strain gauge is an example of an Analog transducer.

Active transducers are self-generating type, they don’t require external power to work while passive transducers require external power to work.

Linear variable differential transformer (LVDT) is a type of transformer used for measuring displacement, and it has the same principle of operation of transformer.

Sensitivity is an important property of transducer. Every transducer should be sufficiently sensitive to provide some output that can be detected.

Geophone is a device used to convert ground movement to voltage, which is used in Remote ground sensors (RGS) and also as a replacement for broadband seismometers.

Photo conductive action is the property of reduction of resistance when exposed to light. Selenium shows photoconductive action.

Capacitive transducers convert measurant into changes in capacitance. Change in capacitance is caused by change in dielectric or change in distance between plates.