Sensor Technology: Principles, Designs and Applications

In recent years, Sensor Technology is being used extensively in Electronics measurements and Instrumentation and signal processing research and many other things. This rapid progress in Electronic Measurement & Instrumentation has created an increasing demand for trained Electronics Engineering personnel. A sensor is a device that responds to any change in physical phenomena or environmental variables like heat, pressure, humidity, movement etc. This change affects the physical, chemical or electromagnetic properties of the sensors which is further processed to a more usable and readable form. Sensor is the heart of a measurement system. It is the first element that comes in contact with environmental variables to generate an output.

A good sensor should have the following characteristics
1.High Sensitivity: Sensitivity indicates how much the output of the device changes with unit change in input (quantity to be measured). For example, the voltage of a temperature sensor changes by 1mV for every 1oC change in temperature than the sensitivity of the sensor is said to be 1mV/oC.
2.Linearity: The output should change linearly with the input.
3.High Resolution: Resolution is the smallest change in the input that the device can detect.
4.Less Noise and Disturbance.
5.Less power consumption.

This book is intended for the undergraduate and postgraduate students specializing in Electronics Engineering. It will also serve as reference material for engineers employed in industry. The fundamental concepts and principles behind Electronics Engineering are explained in a simple, easy- to- understand manner. This book contains a large number of solved example or problem which will help the students in problem solving and designing of Transducers. I do hope that the text book in the present form will meet the requirement of the students doing graduation in Electronics & Communication Engineering, Mechanical Engineering, Electronics & Instrumentation Engineering and Electrical & Electronics Engineering.