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    BME280 gets stuck to 100% Relative Humidity

    woffels
    New Poster

    BME280 gets stuck to 100% Relative Humidity

    We have about 100 dustsensores with a Bosch BME280 as RH/BP and T sensor for sensing  ambient conditions. After a while (some months) and a long period of high humidity, the humidity value gets stuck to 100% for some time. After a while the RH drops back to "normal". Still after a while and after beeing stuck on 100% for serveral times the RH signal drops to 0% and no response from the RH signal anymore. What could this be. We operate within the conditions written in the specs.What could this be?? 

    5 REPLIES 5
    BSTRobin
    Community Moderator

    Re: BME280 gets stuck to 100% Relative Humidity

    From your description "Still after a while and after beeing stuck on 100% for serveral times the RH signal drops to 0% and no response from the RH signal anymore.", we couldn't see that RH signal drops to 0% and no response from your picture. Could you describe this part again? Thanks.

    2022-01-06_10h06_58.png

    woffels
    New Poster

    Re: BME280 gets stuck to 100% Relative Humidity

    Dropping to 0% is not visible in this graph. We havent had a BME280 that recovered after going to 0%. 

    BSTRobin
    Community Moderator

    Re: BME280 gets stuck to 100% Relative Humidity

    Hello woffels,

    As we couldn't see it from your test result, could your reproduce your feedback and provide some test data?

    woffels
    New Poster

    Re: BME280 gets stuck to 100% Relative Humidity

    In the attachment you can find the data. Each minute datapoint is the average of the 60 measurement within that minute. As you can see, the signal of the faulty bme drifts away (up). The healthy bme is a sensor that is about 300 m away from the faulty and i suspect that this one is also drifting away.

     

     

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