November 2000
Intermediate to advanced
608 pages
16h 12m
English
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2
RESISTIVE SENSORS
Sensors based on the variation of the electric resistance of a device are very common. That is because many physical quantities affect the electric resistance of a material. Thus resistive sensors are used to solve many measurement problems. Temperature-dependent resistors can also compensate for thermal interference in systems measuring other quantities.
This chapter discusses sensors based on a variation in resistance. It describes their fundamentals (sensing principle, dynamic model, limitations, advantages), technology, equivalent electric circuit, and applications. Some applications use primary sensors, models, and definitions given in Chapter 1. Chapter 3 describes the circuits that yield a useful electric signal.
The different resistive sensors are classified by the physical quantity being measured as mechanical, thermal, magnetic, optical, and chemical variables.
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