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MAHARSHTRA INSTITUTE OF
POLYTECHNIC BETALA
BRAMHAPURI
PRESENTATION ON TRANSDUCER
PRESENTED BY
MR. R.H.UKEY SIR
TRANSDUCER
CONTENTS
 WHAT IS TRANSDUCER
 ELECTRICAL TRASNDUCER
 CLASSIFICATION OF TRANSDUCER
 SELECTION CRITERIA OF TRANSDUCER
 BASIC CANSTRUCTION OF TRANSDUCER
 RESISTANCE TEMPERATURE DETECTOR
 THERMISTER
 LVDT
 RVDT
 STRAIN GAUGE
 BOURDON TUBE
 APLLICATION, ADVANTAGES AND DISADVANTAGES
INTRODUCTION OF TRANSDUCER
Transducer is define as the device which is convert one form of energy into
another form of energy.
 EXAMPLES
 TEMPERATURE TRANSDUCER
 THERMOCOUPLE
 RESISTANCE TEMPERATURE DETECTOR (RTD)
 THERMISTER
 RESISTIVE POSITION TRANSDUCER
 DISPLACEMENT TRANSDUCER
 STRAIN GAUGE
ELECTRICAL TRANSDUCER
 The electrical transducer 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
CLASSIFICATION OF TRASNDUCER
 On the basis of transduction form used
 primary and secondary transducer
 Active and passive transducer
 Analog and digital transducer
 Transducer and invers transducer
ON THE BASIS OF TRANSDUCTION
FORM USED
 Resistive Transducer
 Capacitive
 Inductive
 Voltage and current Generating Transducer
PRIMARY AND SECONDARY
TRANSDUCER
 Example
 LVDT and bourdon tube
PASSIVE AND ACTIVE TRANSDUCER
IF transducer derive the power require for transduction form an power source, then the kind
of transducer are known as passive transducer
EXAMPLE
 LVDT
 RVDT
CONT….
When there is no need for any source then these type of transducer are active
transducer
EXAMPLE ARE :-
Thermocouple
Piezoelectric crystal
THERMOCOUPLE
This Photo by Unknown Author is licensed under CC BY-SA
TYPES OF THERMOCOUPLE
TPYE NAME RANGE
T COPPER-CONSTANTAN -250 TO 400
J IRON-CONSTANTAN -200 TO 850
E CROMEL-CONSTANTAN -200 TO 850
K CHROMEL -ALUMEL -180 TO 1100
W TUNGUSTAN-RHENIUM 0 TO 2600
R PLATINUM 13%- RHODIUM 0 TO 1750
S PLATINUM 10%- RHODIUM 0 TO 1750
B PLATINUM 30%- RHODIUM 6% 0 TO 1800
PIEZOELECRTIC CRYSTAL
 Quartz ,Rochelle salt, Lithium sulphate barium Titanate
INVERSE TRANSDUECR
These type of transducer convert a electrical quantity into non-electrical quantity
Example
 Piezoelectric crystal
 Analog ammeter
 voltmeter
SELECTION CRITERIA OF THE
TRANSDUCER
 Operating principle
 Sensitivity
 Operating range
 Accuracy
 Errors
 Environmental capability
 Insensitive to unwanted signal
 stability
BASIC CONSTRUCTION OF
TRANSDUCER
It consist of two important parts
 Sensing element
 Transduction element
RESISTANCE TEMPERATURE DETECTOR
(RTD)
THERMISTER
THERMISTER ARE USED FOR THE MEASUREMENT OF PRECISION TEMPERATURE
LINEAR VARIABLE DIFFERNTIAL
TRANFORMER (LVDT)
CONT….
ROTARY VARIABLE DIFFERENTAIL
TRASDUCER (RVDT)
STRAIN GAUGE
 It work on piezoelectric effect
 These are used for measurement of stress and strain
 If an elastic material is subjected to tension then its resistance changes
BOURDON TUBE
 Curve metallic cross section
 Elliptical cross section
 Sealed at one end
 Tend to straighten when pressure applied
 Angular sensitivity proportional to pressure applied
BOURDON TUBE
APPLICATION
 Audio/video equipment
 Pressure indication
 Measurement of displacement
 Alarms
ADVANTAGES
 Power requirement I very low for controlling the electrical or electronic
system
 Output can be indication And recorded remotely from the sensing
element.
 Electrical amplification and attenuation can be easily done.
DISAVANTAGES
 RTD produce mechanical vibration
 Their cost is high
 Thermistor are unsuitable for wide temperature

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MAHARSHTRA INSTITUTE OF POLYTECHNIC BETALA BRAMHAPURI.pptx

  • 1. MAHARSHTRA INSTITUTE OF POLYTECHNIC BETALA BRAMHAPURI PRESENTATION ON TRANSDUCER PRESENTED BY MR. R.H.UKEY SIR
  • 3. CONTENTS  WHAT IS TRANSDUCER  ELECTRICAL TRASNDUCER  CLASSIFICATION OF TRANSDUCER  SELECTION CRITERIA OF TRANSDUCER  BASIC CANSTRUCTION OF TRANSDUCER  RESISTANCE TEMPERATURE DETECTOR  THERMISTER  LVDT  RVDT  STRAIN GAUGE  BOURDON TUBE  APLLICATION, ADVANTAGES AND DISADVANTAGES
  • 4. INTRODUCTION OF TRANSDUCER Transducer is define as the device which is convert one form of energy into another form of energy.  EXAMPLES  TEMPERATURE TRANSDUCER  THERMOCOUPLE  RESISTANCE TEMPERATURE DETECTOR (RTD)  THERMISTER  RESISTIVE POSITION TRANSDUCER  DISPLACEMENT TRANSDUCER  STRAIN GAUGE
  • 5. ELECTRICAL TRANSDUCER  The electrical transducer 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
  • 6. CLASSIFICATION OF TRASNDUCER  On the basis of transduction form used  primary and secondary transducer  Active and passive transducer  Analog and digital transducer  Transducer and invers transducer
  • 7. ON THE BASIS OF TRANSDUCTION FORM USED  Resistive Transducer  Capacitive  Inductive  Voltage and current Generating Transducer
  • 8. PRIMARY AND SECONDARY TRANSDUCER  Example  LVDT and bourdon tube
  • 9. PASSIVE AND ACTIVE TRANSDUCER IF transducer derive the power require for transduction form an power source, then the kind of transducer are known as passive transducer EXAMPLE  LVDT  RVDT
  • 10. CONT…. When there is no need for any source then these type of transducer are active transducer EXAMPLE ARE :- Thermocouple Piezoelectric crystal
  • 11. THERMOCOUPLE This Photo by Unknown Author is licensed under CC BY-SA
  • 12. TYPES OF THERMOCOUPLE TPYE NAME RANGE T COPPER-CONSTANTAN -250 TO 400 J IRON-CONSTANTAN -200 TO 850 E CROMEL-CONSTANTAN -200 TO 850 K CHROMEL -ALUMEL -180 TO 1100 W TUNGUSTAN-RHENIUM 0 TO 2600 R PLATINUM 13%- RHODIUM 0 TO 1750 S PLATINUM 10%- RHODIUM 0 TO 1750 B PLATINUM 30%- RHODIUM 6% 0 TO 1800
  • 13. PIEZOELECRTIC CRYSTAL  Quartz ,Rochelle salt, Lithium sulphate barium Titanate
  • 14. INVERSE TRANSDUECR These type of transducer convert a electrical quantity into non-electrical quantity Example  Piezoelectric crystal  Analog ammeter  voltmeter
  • 15. SELECTION CRITERIA OF THE TRANSDUCER  Operating principle  Sensitivity  Operating range  Accuracy  Errors  Environmental capability  Insensitive to unwanted signal  stability
  • 16. BASIC CONSTRUCTION OF TRANSDUCER It consist of two important parts  Sensing element  Transduction element
  • 18. THERMISTER THERMISTER ARE USED FOR THE MEASUREMENT OF PRECISION TEMPERATURE
  • 22. STRAIN GAUGE  It work on piezoelectric effect  These are used for measurement of stress and strain  If an elastic material is subjected to tension then its resistance changes
  • 23. BOURDON TUBE  Curve metallic cross section  Elliptical cross section  Sealed at one end  Tend to straighten when pressure applied  Angular sensitivity proportional to pressure applied
  • 25. APPLICATION  Audio/video equipment  Pressure indication  Measurement of displacement  Alarms
  • 26. ADVANTAGES  Power requirement I very low for controlling the electrical or electronic system  Output can be indication And recorded remotely from the sensing element.  Electrical amplification and attenuation can be easily done.
  • 27. DISAVANTAGES  RTD produce mechanical vibration  Their cost is high  Thermistor are unsuitable for wide temperature