This document discusses transducers and their classification. It defines a transducer as a device that converts a non-electrical physical quantity into a corresponding electrical quantity. Transducers are classified based on their transduction form (resistive, capacitive, inductive), whether they are active or passive, analog or digital, primary or secondary, and transducers versus inverse transducers. Common transducer types include position, potentiometer, strain gauge, and temperature transducers. Selection criteria for transducers include operating principle, sensitivity, operating range, accuracy, stability, and environmental capability.

1. Transducers Report
Prepared by :
‫عزيز‬ ‫وديع‬ ‫اشرف‬ ‫فيرينا‬

2. CONTENTS
●WHAT IS TRANSDUCER
●ELECTRICAL TRANSDUCER
●CLASSIFICATION OF TRANSDUCERS
●SELECTION CRITERIA OF THE TRANSDUCERS
●Transduser types

3. ELECTRICAL TRANSDUCERS
● The electrical transducers is one which
converts the non-electrical quantity into the
equivalent electrical quantity.
●Non-electrical quantity such as force,
displacement,
stress, temperature.
●Electrical quantity such as current , voltage

4. CLASSIFICATION OF TRANSDUCERS
●On the basis of transduction form used
●As primary and secondary transducers.
●As passive and active transducers.
●As analog and digital transducers.
●As transducers and inverse transducers

5. 1-On the basis of
transduction form used
●Resistive Transducers.

6. ●Capacitive Transducers.

7. ●Inductive Transducers.

8. 2. Active and Passive Transducers
a- Active Transducer
The transducer which does not requires any external
excitation to provide their outputs

9. b-Passive Transducer
The transducer which requires an external excitation to
provide their output is referred as passive transducer.

10. 3. Analog and Digital Transducers
a-Analog Transducer
The transducer which produces their outputs in analog form or
a form which is a continuous function of time is referred as
analog transducer.

11. b-Digital Transducer
The transducer which produces their outputs in digital
form or a form of pulses is referred as digital transducers.

12. 4. Primary and Secondary Transducers
a-Primary Transducer
The transducer which sends the measurement and
converts them into another variables (like
displacement, strain etc.) and whose output forms the
input of another

13. b-Secondary Transducer
The transducer which converts the output of first
transducer into an electrical output called secondary
transducer.

14. 5. Transducers and Inverse Transducers
a-Transducers
A measuring device which measures and
converts nonelectrical variable into electrical
variable is known as transducer.

15. b-Inverse Transducer
A measuring device which measures and
converts an electrical variable into
nonelectrical variable is known as inverse
transducer.

16. SELECTION CRITERIA OF THE
TRANSDUCERS
●Operating principle
●Sensitivity
●Operating range
●Accuracy
●Errors
●Environmental capability
●Insensitive to unwanted Signal
●Stability

17. types of transducer
Position Transducers detect the position of
something which means that they are
referenced either to or from some fixed point or
position.
Position Transducers can detect the movement of an
object in a straight line
using Linear Transducers or by its angular movement
using Rotational Transducers.
1 – Resistive Position Transducer

18. 2. Potentiometer transducers
It is defined as a three terminal variable resistor in which
the resistance is
manually varied to control the flow of electric current.
Potentiometers work by varying the position of a sliding
contact across a
uniform resistance. In a potentiometer, the entire input
voltage is applied across the
whole length of the resistor, and the output voltage is the
voltage drop between the
fixed and sliding contact as shown below. The resistance is
proportional to the position

19. 3-Strain Gauge Transducers
The strain gauge is an example of a passive transducer
that uses electrical resistance variation in wires to sense
the strain produced by a force on the wires.
The gauge is glued onto the device by an adhesive.
When an object shows physical deformation, its
electrical resistance gets change and that change is then
measured by gage.

20. 4 - Temperature Transducer
Compare RTD with thermistor.

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