What is a transducer? How can we classify transducers? On what principles do the

Question

What is a transducer? How can we classify transducers? On what principles do the variable inductance type of transducers work? What are uses of LVDT for measurement? List uses of thermistors? What are active transducers ? Give an example. What is Hall effect? What is principle of photoelectric transducers? What is a Piezoelectiric transducer? Give advantages and limitations of foil strain gauges. What is gauge factor? (sometimes called scale factor) What is a Piezoelectric transducer? What are uses of LVDT for measurements? List out advantages of LVDT

Explanation / Answer

A transducer is a device that converts one form of energy to another. Energy types include electrical, mechanical, electromagnetic, chemical, acoustic or thermal energy. Transducers can be found both at the input as well as at the output stage of a measuring system : The input transducer is called the sensor, because it senses the desired physical quantity and converts it into another energy form. The output transducer is called the actuator, because it converts the energy into a form to which another independent system can react, whether it is a biological system or a technical system.

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