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ELECTRONICS MECHANIC - CITS
MODULE 4 : Sensors, Transducers and Applications
LESSON 43 - 47 : Sensors, Transducers and Applications
Objectives
At the end of this lesson you shall be able to:
• state the classification, principles application of sensors & transducers
Sensors, Transducers and Applications
Transducer
A transducer is an electronic device that converts energy from one form to another. Common examples include
microphones, loudspeakers, thermometers, position and pressure sensors, and antenna.
Classification based on Source of Energy requirement-
• Active Transducer
• Passive Transducer
Active Transducer
Active transducer is defined as transducer that does not requires an external energy source. In this type of
transducer, the non-electrical quantity which is to be measured is converted to electrical output without any
external source. As it does not require any external source this type of transducer is also known as a self-
generating transducer.
Examples of an Active Transducer: Thermocouple, Piezoelectric Pick up & Photovoltaic.
Active transducer Classification
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