# 2025 Plantower PMS5003 variation

**URL:** <https://community.purpleair.com/t/2025-plantower-pms5003-variation/22509>\
**Category:** Sensors\
**Created:** [January 21, 2026, 1:10pm UTC](https://community.purpleair.com/t/2025-plantower-pms5003-variation/22509 "2026-01-21T13:10:19Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![JayGuerette](https://avatars.discourse-cdn.com/v4/letter/j/e5b9ba/32.png) [@JayGuerette](https://community.purpleair.com/u/JayGuerette)\
**Post date:** [January 21, 2026, 1:10pm UTC](https://community.purpleair.com/t/2025-plantower-pms5003-variation/22509/1 "2026-01-21T13:10:19Z")

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I bought a new 2025 Plantower PMS5003 that is fairly consistent with 2 others purchased about 4 years ago except the \<0.3μm bin is off by a factor of 3.

You reported some variations over the past years, with the most recent update Oct/2024. Have you seen any issues with the 20250408 or later batches?

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**Author:** ![Kieran](https://sea2.discourse-cdn.com/flex020/user_avatar/community.purpleair.com/kieran/32/6220_2.png) [@Kieran](https://community.purpleair.com/u/Kieran)\
**Post date:** [January 27, 2026, 9:58pm UTC](https://community.purpleair.com/t/2025-plantower-pms5003-variation/22509/2 "2026-01-27T21:58:07Z")

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Hi Jay,

We have not observed any issues with more recent batches. Although, it is possible that your previous counters are part of the batch that did have issues. Were the previous laser counters received as part of a sensor purchase?

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**Author:** ![JayGuerette](https://avatars.discourse-cdn.com/v4/letter/j/e5b9ba/32.png) [@JayGuerette](https://community.purpleair.com/u/JayGuerette)\
**Post date:** [January 29, 2026, 11:02pm UTC](https://community.purpleair.com/t/2025-plantower-pms5003-variation/22509/3 "2026-01-29T23:02:09Z")

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They were also purchased independently. They’re 20201228. I’m guessing the new one is defective.

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**Author:** ![ShawnBoyle](https://sea2.discourse-cdn.com/flex020/user_avatar/community.purpleair.com/shawnboyle/32/6816_2.png) [@ShawnBoyle](https://community.purpleair.com/u/ShawnBoyle)\
**Post date:** [June 25, 2026, 11:25pm UTC](https://community.purpleair.com/t/2025-plantower-pms5003-variation/22509/4 "2026-06-25T23:25:16Z")

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Jay,

As a follow-up to this, we’d be happy to take a look at your sensor readings if this is still a concern. You can send the sensor’s device ID to [contact@purpleair.com](mailto:contact@purpleair.com), and we’ll offer our analysis and support in determining what might be going on. If you’d prefer to do so, you can share some information in this thread for us to take a look.

Please note that if your laser counters weren’t purchased from us, we can’t guarantee their quality through our in-house testing process.