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The transducer may be defined as any device that convert the energy from one form to another, Most of the transducers either convert electrical energy in to mechanical displacement and convert some non electrical physical quantities like temperature, Light, Pressure , Force , Sound etc to an electrical signals. In an electronics instrument system the function of transducers is of two types.
- To detect or sense the pressure, magnitude and change in physical quantity being measured.
- To produce a proportional electrical signal.
Classification of Transducers
They required an external power supply and therefore output is equal to the variation in a physical parameter such as pressure, temp etc
- Resistance Temperature Transducer
The self generated transducers don’t use the external power supply source. However they provide an electrical output when stimulated by some physical form of energy. The self generated transducers are sub divided into many groups.
- Thermal Transducers
- Thermo Couple
- Resistor Heat Control
- Photo Conductive
- Photo Voltic
- Strain Guage
- Magnetic Transducers
- LVDT Transducers