as in detector
a device that detects some physical quantity and responds usually with a transmitted signal the cat accidentally triggered the motion sensor, which set off the alarm

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Recent Examples of sensor Simply place it in the dispenser, apply it to your upper arm, and bring your phone next to the sensor to connect it. Brenda Stolyar, WIRED, 9 Jan. 2025 The image was captured Jan. 8 by Maxar Technologies' shortwave infrared sensor. Ramon Padilla, USA TODAY, 9 Jan. 2025 As of Wednesday morning, based on sensor data from satellite and radar, the Eaton fire appeared to be the most intense and expanding most rapidly, as gusty winds pushed the blaze west toward more densely populated areas. Ali Watkins, New York Times, 8 Jan. 2025 When someone stepped on the ground above or near the mine, their weight triggered a pressure sensor and caused the device to explode. IEEE Spectrum, 8 Jan. 2025 See all Example Sentences for sensor 

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“Sensor.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/sensor. Accessed 22 Jan. 2025.

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