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  1. Home
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  3. Quantifying IAQ values of BME680

Quantifying IAQ values of BME680

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  • N Offline
    N Offline
    Nikhil Sukhdev
    wrote on last edited by
    #1

    Hi,
    I have recently started working with the bosch BME680 sensor. I don't quite understand what does the rating of the IAQ value of 50 mean. On visiting the datasheet of BME680, it says 0-50 corresponds to the air quality being 'good'. When we say an IAQ of 50, what is the concentration of the VOC's in terms of mg/m^3 or ug/m^3 or something of that sort?Can somebody please help me out?

    electrikE mfalkviddM 2 Replies Last reply
    0
    • N Nikhil Sukhdev

      Hi,
      I have recently started working with the bosch BME680 sensor. I don't quite understand what does the rating of the IAQ value of 50 mean. On visiting the datasheet of BME680, it says 0-50 corresponds to the air quality being 'good'. When we say an IAQ of 50, what is the concentration of the VOC's in terms of mg/m^3 or ug/m^3 or something of that sort?Can somebody please help me out?

      electrikE Offline
      electrikE Offline
      electrik
      wrote on last edited by
      #2

      @nikhil-sukhdev

      As I read the datasheet, the sensor also provides raw measurements of the gas sensor (5.3.4.4). Perhaps you can use that instead of the compensated IAQ values?

      Nca78N 1 Reply Last reply
      0
      • N Nikhil Sukhdev

        Hi,
        I have recently started working with the bosch BME680 sensor. I don't quite understand what does the rating of the IAQ value of 50 mean. On visiting the datasheet of BME680, it says 0-50 corresponds to the air quality being 'good'. When we say an IAQ of 50, what is the concentration of the VOC's in terms of mg/m^3 or ug/m^3 or something of that sort?Can somebody please help me out?

        mfalkviddM Offline
        mfalkviddM Offline
        mfalkvidd
        Mod
        wrote on last edited by
        #3

        @nikhil-sukhdev the information in these threads might be useful
        https://forum.mysensors.org/topic/7788/bosch-bme680-sensor/
        https://forum.mysensors.org/topic/9290/air-quality-node

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        • electrikE electrik

          @nikhil-sukhdev

          As I read the datasheet, the sensor also provides raw measurements of the gas sensor (5.3.4.4). Perhaps you can use that instead of the compensated IAQ values?

          Nca78N Offline
          Nca78N Offline
          Nca78
          Hardware Contributor
          wrote on last edited by
          #4

          @electrik said in Quantifying IAQ values of BME680:

          @nikhil-sukhdev

          As I read the datasheet, the sensor also provides raw measurements of the gas sensor (5.3.4.4). Perhaps you can use that instead of the compensated IAQ values?

          I think it's not a good idea. All the interest of the software suite that generates the IAQ is to process nearly meaningless raw values (dependant on temperature, humidity, time the sensor has been running, age of sensor,...) and provide a consistant and understandable value.

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