Transducer: Part 2 - Classification of transducers

This post is as a continuation of the previous post on transducers.
If you are not aware of transducers, please read the brief post about transducers and about it's classification on active transducers and passive transducers.

The classification of transducers are made o the following basis:

Classification of transducers:

1. Based on the physical phenomenon,

  • Primary transducer
  • Secondary transducer
2. Based on the power type Classification,

  • Active transducer
  • Passive transducer
3. Based on the type of output the classification of transducers are made,

  • Analog transducer
  • Digital transducer
4. Based on the electrical phenomenon is a best Classification of Trasnducer,

  • Resistive transducer
  • Capacitive transducer
  • Inductive transducer
  • Photoelectric transducer
  • Photovoltaic transducer
5. Based on the non-electrical phenomenon Classification of transducer,

  • Linear displacement
  • Rotary displacement
6. Based on the transduction phenomenon,

  • Transducer
  • Inverse transducer.

Factor to be considered while selecting transducer:

• It should have high input impedance and low output impedance, to avoid loading effect.
• It should have good resolution over is entire selected range.
• It must be highly sensitive to desired signal and insensitive to unwanted signal.
• Preferably small in size.
• It should be able to work n corrosive environment.
• It should be able to withstand pressure, shocks, vibrations etc..
• It must have high degree of accuracy and repeatability.
• Selected transducer must be free from errors.

Requirements of a good transducers

• Smaller in size and weight.
• High sensitivity.
• Ability to withstand environmental conditions.
• Low cost.
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