Sensors

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some instrumental sensors

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Sensors

  1. 1. SENSORS
  2. 2. CONTENT• INTRODUCTION• TRANSDUCER• CLASSIFICATIONS OF INSTRUMENTS
  3. 3. INTRODUCTION• CONVERTS PHYSICAL CHANGE INTO ELECTRICAL OR NON-ELECTRICAL QUANTITY.
  4. 4. INTRODUCTION
  5. 5. TRANSDUCER• A transducer is a device that converts one form of energy to another
  6. 6. Some typical Sensors and TransducersThermistors Ambient Light Sensor Thermocouple
  7. 7. Some Typical Transducers LVDTs RTDs Thermowel
  8. 8. CLASSIFICATIONS OFINSTRUMENTS
  9. 9. ON THE BASIS OF SIGNALSAnalog Digital • An Analog instrument gives an • A digital instrument has an output which varies output which varies in discrete continuously as the quantity steps and so can only have a being measured changes finite number of values
  10. 10. ON THE BASIS OF POWER CONSUMPTIONACTIVE PASSIVE• External power source is • No external power source is needed required
  11. 11. ON THE BASIS OF OPERATIONAutomatic Manual• An auxiliary device is present. • Need an operator.• Fast dynamic response. • Poor dynamic response.• Lower operating cost. • Operation cost is higher.
  12. 12. On the Basis of display of resultDeflection Null• Simple in construction and • Manual operation. operation. • Poor dynamic response.• Good dynamic response.
  13. 13. On the Basis of contactContacting Non contacting• Instrument is present in the • Not in direct contact with the medium itself. measuring medium.• Eg. Clinical thermometer. • Eg. Optical pyrometers.
  14. 14. Thank youSUBMITTED BY: Amit Thakur

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