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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 classifications 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 Transducer, 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 good transducers

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

And these are the Best Classification of Transducers. Books Related to Transducers That I Recommend: 1. Smuggling Nuclear Pressure Transducers into Iran by Daniel Arthur Workman

Go and read,, An actuator is a type of motor for moving or controlling a mechanism or system. It is operated by a source of energy, usually in the form of an electric current, hydraulic fluid pressure or pneumatic pressure, and converts that energy into some kind of motion. An actuator is the mechanism by which an agent acts upon an environment. The agent can be either an artificial intelligent agent or any other autonomous being (human, other animal, etc). What Is an Air Actuator? An air actuator, also called a pneumatic actuator, is a device made to produce motion through air pressure. Depending on how the actuator is set up, an air actuator is able to make either rotary or linear motion, and some special actuators can produce both. One of the most important parts of this type of actuator is the piston, which is directly responsible for how much power the device can output and may decrease the amount of incoming air pressure required. While this system is one of the strongest, the power will sharply decrease if there is anything blocking the air input. Every actuator is made to push other parts via motion, and a power source is needed to make this motion. With an air actuator, air pressure is the predominant energy. This tends to be stronger than other power sources and often leads to fewer electrical parts, but this actuator needs many mechanical parts. There needs to be parts, such as an air compressor and piston, to regulate and produce the air. Air also is cleaner than other methods, such as hydraulic, because liquids are not needed for the actuator to work. Like most actuators, an air actuator is able to create either rotary or linear movement. Rotary air actuators are able to create circular and angular movements, while linear air actuators move