# How to tell if so1 sensor is faulty

**URL:** <https://community.inkbird.com/t/how-to-tell-if-so1-sensor-is-faulty/71619>\
**Category:** Questions & Answers\
**Tags:** smart-controller\
**Created:** [July 20, 2023, 11:01pm UTC](https://community.inkbird.com/t/how-to-tell-if-so1-sensor-is-faulty/71619 "2023-07-20T23:01:28Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Lewl](https://avatars.discourse-cdn.com/v4/letter/l/e8c25b/32.png) [@Lewl](https://community.inkbird.com/u/Lewl)\
**Post date:** [July 20, 2023, 11:01pm UTC](https://community.inkbird.com/t/how-to-tell-if-so1-sensor-is-faulty/71619/1 "2023-07-20T23:01:28Z")

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My icc500t is reading 3500ppm+ ambient! I’m alive so it must be erroneous!!!

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**Author:** ![Tania](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.inkbird.com/tania/32/88_2.png) [@Tania](https://community.inkbird.com/u/Tania)\
**Post date:** [July 21, 2023, 9:40am UTC](https://community.inkbird.com/t/how-to-tell-if-so1-sensor-is-faulty/71619/2 "2023-07-21T09:40:14Z")

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Hello,  
Please check that the probe, the white sticker on the probe, and the probe cable are intact?  
If the probe is plugged into another probe port and tested in a dry stable environment, will it still read off?  
If yes, please send an email to [support@inkbird.com](mailto:support@inkbird.com) with order information and a picture of the problem.