Different Types of Transducers

Abstract

A transducer basically converts energy from one form to another, usually from many different forms such as energy, force, torque, light, motion, and position to electrical signals and is shown in Fig. 3.1. Active transducer such as a thermocouple converts temperature to voltage and do not require any external energy. However, a passive transducer is based on change in some passive electrical quantity, such as capacitance, resistance, or inductance, and requires external energy source.