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A detector only signals the presence.

A sensor allows both signaling the presence and intensity of stimuli.

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A sensor is a device that detects a physical property and converts it into an electrical signal, such as temperature or pressure. A detector is a device that specifically detects the presence of something, such as a gas or a substance, without necessarily converting it into an electrical signal. In essence, a detector is a type of sensor that focuses on detecting a particular target or substance.

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Q: Difference between sensor and detector
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