Page 84 - CITS - Electronic Mechanic - TT - 2024

ELECTRONICS MECHANIC - CITS

Passive Transducer
The transducer which requires external energy to produce its output is called a passive transducer. This transducer
requires external energy to process the output from the sensing element to produce respective electric output.
The electrical parameters in a passive transducer are resistance, inductance, and capacitance which require
external energy for conversion.
Examples of Passive Transducer: Potentiometric Transducer, RTD, Thermistor, Capacitor microphone, LVDT
etc.,

Selection Transducer
Factors to consider while selecting a transducer Transducers should have high input impedance and low output
impedance to avoid the loading effect. A transducer should be highly sensitive to desired signals and insensitive
to unwanted signals. Transducers should be able to work in corrosive environments.
Operating range : The range of transducer should be appropriate for measurement to get a good resolution.

Operating Principle : The transducers are selected on the basis of operating principle it may be resistive,
inductive, capacitive, optical etc.
Accuracy : The accuracy should be as high as possible or as per the measurement.

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CITS : E & H - Electronics Mechanic - Lesson 43 - 47