# What pollutants does purple air track - more or less than EPA which is limited?

**URL:** <https://community.purpleair.com/t/what-pollutants-does-purple-air-track-more-or-less-than-epa-which-is-limited/2153>\
**Category:** Sensors\
**Created:** [September 25, 2022, 8:21pm UTC](https://community.purpleair.com/t/what-pollutants-does-purple-air-track-more-or-less-than-epa-which-is-limited/2153 "2022-09-25T20:21:50Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Bobcat](https://sea2.discourse-cdn.com/flex020/user_avatar/community.purpleair.com/bobcat/32/1267_2.png) [@Bobcat](https://community.purpleair.com/u/Bobcat)\
**Post date:** [September 25, 2022, 8:21pm UTC](https://community.purpleair.com/t/what-pollutants-does-purple-air-track-more-or-less-than-epa-which-is-limited/2153/1 "2022-09-25T20:21:51Z")

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HI anyone have an answer to this?

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**Author:** ![Ethan](https://sea2.discourse-cdn.com/flex020/user_avatar/community.purpleair.com/ethan/32/177_2.png) [@Ethan](https://community.purpleair.com/u/Ethan)\
**Post date:** [September 26, 2022, 3:20pm UTC](https://community.purpleair.com/t/what-pollutants-does-purple-air-track-more-or-less-than-epa-which-is-limited/2153/2 "2022-09-26T15:20:16Z")

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Hi @Bobcat, PurpleAir sensors measure particulate matter, which are solid and liquid particles suspended in the air. They measure particles from 0.3µ to 10µ in size.

PurpleAir sensors also measure temperature, pressure, and humidity.  
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​The components that we use can be found here: [Our Technology](https://community.purpleair.com/t/our-technology/804).