# What does PIR stand for?

**URL:** <https://community.aosulife.com/t/what-does-pir-stand-for/327>\
**Category:** Ask aosu\
**Tags:** function-intro\
**Created:** [April 3, 2025, 6:56am UTC](https://community.aosulife.com/t/what-does-pir-stand-for/327 "2025-04-03T06:56:22Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![aosu\_Captain](https://yyz2.discourse-cdn.com/flex034/user_avatar/community.aosulife.com/aosu_captain/32/676_2.png) [@aosu\_Captain](https://community.aosulife.com/u/aosu_Captain)\
**Post date:** [April 3, 2025, 6:56am UTC](https://community.aosulife.com/t/what-does-pir-stand-for/327/1 "2025-04-03T06:56:22Z")

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PIR stands for Passive Infra-Red. It is a technology used in security systems to detect movement or intruders by recognizing light emitted from nearby objects.