My indoor monitor CO2 readings went from ~400ppm to ~7500+ a few days ago. Any idea if this could be a failed sensor?
What is the mean-time-to-failure of the different sensor modules (asking as I previously replaced the PMS5003 module)?
Screenshot for the current readings over the last
Hi @cyberhiker , I’m sorry to hear that the device doesn’t work as expected.
According to SenseAir, the SenseAir S8 and S88 have a life expectancy of >15 years.
Regarding the issue you’ve experienced, could you try plugging your air monitor into a different USB power adapter and observe the CO2 reading? An unstable (usually undervoltage) power supply can cause a massive CO2 spike. If the issue still persists, please feel free to contact us via https://www.airgradient.com/support .
Did you recently move or bump the sensor? That can cause the readings to change drastically.
You could take the monitor outdoors (or very close to an open window" for 5-10 minutes and then request CO2 calibration from the Dashboard and see if that gets it back to around 400 outdoors and then you can move it back where you want it
I tried this and it looks to be back working again. It was interesting to see that side-by-side with my outdoor unit the values were further apart than I would have expected.
I’m glad to hear that! Thanks @MallocArray so much for the advice I missed.
@cyberhiker If you have any questions or if the issue comes back, please feel free to let us know.
Thanks!
How far off were the 2 units when doing the outdoor calibration? The outdoor being outside all of the time, has likely calibrated to the lowest value of CO2 over the last week, but your indoor unit moved outside temporarily can only calibrate to the lowest level while it was just outside, so only a few minutes.
If it was off by ~40 ppm I would think that is expected. If more than 100, that is probably something else
Hi @cyberhiker, do you have an update on this? Please feel free to let us know if there’s anything we can help. Thank you!
