# What is a sensor?

**URL:** <https://forumautomation.com/t/what-is-a-sensor/769>\
**Category:** Field Instrumentation\
**Created:** [February 8, 2016, 2:06am UTC](https://forumautomation.com/t/what-is-a-sensor/769 "2016-02-08T02:06:04Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![denizen](https://forumautomation.com/letter_avatar_proxy/v4/letter/d/848f3c/32.png) [@denizen](https://forumautomation.com/u/denizen)\
**Post date:** [February 8, 2016, 2:06am UTC](https://forumautomation.com/t/what-is-a-sensor/769/1 "2016-02-08T02:06:04Z")

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A sensor is a device that receives and responds to a signal

The signal is some type of energy for example heat,light,motion, or chemical.

A sensor detects a signal converts it in to a readable ouput signal.