The function that a sensor performs is to detect a physical parameter and transduce its energy to a signal that can be understood. Thus, many people use the words “sensor,” “detector” and “transducer” interchangeably—and sometimes the word “monitor.” Implied in the act of detection or sensing is measurement of the strength of the phenomenon, and so the terms “sensing” and “measurement” can likewise mean the same thing.

Sensor 101

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