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    BME680 VOC ppm to mg/m3

    BME680 VOC ppm to mg/m3

    terence06
    New Poster

    Hi Sir/Madam,

    I have a project is using the BME680 to detect the VOC value. BME680 which can output the bVOC value in ppm. Is it possible can convert this value from ppm to mg/m3? Also, is it bVOC is same as TVOC? 

    Looking forward anyone can reply. Thanks a lot. 

    16 REPLIES 16

    Jet
    Occasional Contributor

    Hi Sir:

         Recommend you to get the related conversion formula by internet. Thank you for your understanding.

       

     

    Thanks.

    One more question. Do you know what is the range of b-VOC of BME680 (in ppm)? I still can't found this value in data sheet. Thanks

    Jet
    Occasional Contributor

    Hi Jet,

    Thanks for the reply. 

    I have found the conversion equation on internet (mg/m3 = ppm * Molecular Mass * 0.0409). This equation should be quite common for the conversaion. But we are missing the molecular mass information.

    So, if we want to use the b-VOC value from BME680, then what molecular Mass should If we use in this equation? 

    Also, for b-VOC range, the range is from 0.5 to 1000ppm. We always detect the value in our office is 0.5ppm and sometime we have the reading is 5ppm. Is it normal? You can see my attached result. About the 0.5 to 1000ppm, is any meaning for this range? For example, 0.5 to 5 mean Low level of TVOC? Just like the TVOC range definition.

    If I need to sign any NDA to have this information, please let me know and our company willing to sign this. Thanks.

     

    Jet
    Occasional Contributor

    Hi Sir:

        I forwarded your request to our internal experts.

        If possible, it is better to sign NDA with BST so that you can get more support and be shared more information.

     

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