The classification of transducers are made from the following basis:

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.