This document presents a classification of transducers. It begins by defining a transducer as a device that converts one form of energy into another. The document then discusses several classifications of transducers including active vs passive, transducer vs inverse transducer, analog vs digital, and primary vs secondary. Examples are provided for each classification. The document also covers advantages and disadvantages of transducers as well as common applications. In conclusion, transducers are useful devices for converting one energy form to another for various applications.

1. PRESENTATION ON
Classification Of Transducer
INDUSTRIAL INSTRUMENT
(2170913)
Department Of Electrical Engineering
B.H.Gardi College Of Engineering & Technology
Submitted To:-
Asst Prof. Amit A Kulkarni
Prepared By:-
Jaydeep Chandra (140040109009)
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2. CONTENTS
WHAT IS TRANSDUCER
NEED OF TRANSDUCERS
CLASSIFICATION OF TRANSDUCERS
ADVATAGES
 DISADVANTAGES
APPLICATION
CONCLUSION
REFERENCES
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3. WHAT IS TRANSDUCER
The transducer is defined as the device which convert the one form of energy into
another form of the energy
Example:
 Temperature transducers
 Thermocouples
 Resistance-Temperature Detectors (RTD)
 Thermistors
 Resistive position transducers
 Displacement transducers
 Strain gauge
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4. Need of transducers
Usually the input to an instrumentation system is a non-electrical quantity. In
order to convert a non electrical quantity into an electrical quantity a transducer is
required.
Input :
Non-electrical
T
R
A
N
S
D
U
C
E
R
Output :
Electrical

5. CLASSIFICATION OF TRANSDUCERS
Transducers
Active and passive
Transducers
Transducer and
Inverse Transducer
Analog and
Digital Transducer
Primary and
secondary
Transducer
On the Basis of
Transduction Form
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6. ACTIVE AND PASSIVE
TRANSDUCERS
• Active Transducers : The transducers which do not require an external power
supply for their operation are called as active transducers.
Example : Piezoelectric transducers.
• Passive Transducers : The transducers which require an external power supply
for their operation are called as passive transducers.
Example : LVDT
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7. TRANSDUCER AND INVERSE
TRANSDUCER
 Transducers as already defined , is a device that converts a non electrical
quantity into an electrical quantity. Normally a transducer and associated circuit
has a non electrical input and an electrical output.
Example : thermocouple , photo conductive cell pressure gauge, Strain
gauge
 It is a device that converts an electrical quantity into a non electrical quantity. it
is a precision actuator having an electrical input and a low power non electrical
output.
Example : piezoelectric crystal
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8. ANALOG AND DIGITAL
TRANSDUCERS
Analog transducers : They convert the input physical phenomenon into an
analog output that is a continuous function of time.
Example : LVDT.
Digital Transducers : They convert the input physical phenomenon in
discrete steps of electrical output i.e. in the form of pulses.
Example : Rotary encoders.
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9. PRIMARY AND SECONDARY
TRANSDUCERSExample:
LVDT & BOURDON TUBE
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10. ON THE BASIS OF
TRANSDUCTION FORM USED
• Resistive Transducers.
• Capacitive Transducers.
• Inductive Transducers.
• Voltage and current Generating Transducers.
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11. ADVANTAGES
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 Power requirement is very low for controlling the electrical or electronic system.
 Output can be indicated and recorded remotely from the sensing element.
 Electrical amplification and attenuation can be easily done.
 An amplifier may be used to amplify the electrical signal according to
requirement.

12. DISADVANTAGES
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 RTD produce mechanical vibrations
 Their cost is high.
 Thermistors are unsuitable for wide temperature.
 Relative large displacement is required for appreciable output for LVDT.
 Bourdon tube do not provide the precise measurement.

13. APPLICATIONS
 Loudspeaker, earphone: converts electrical signals into sound.
Antenna: converts propagating electromagnetic waves to and from conducted
electrical signals.
 Hall effect sensor: It converts magnetic field level into an electrical signal.
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14. 14
CONCLUSION
 Transducers are used to convert one form energy to another.
 All the transducers are very useful in all the application such as microphone,
speakers etc.

15. THANK
YOU
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