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Recent content by m-madani

  1. M

    help with MQ137 NH3 sensor

    For finding RO (Sensor resistance in clean air): we can measure output voltage of sensor in clean air and then calculate RS . According to datasheet in clean air (Rs/Ro)=3.3 . Ro=(Rs/3.3).
  2. M

    help with MQ137 NH3 sensor

    Please help ! Thanks
  3. M

    help with MQ137 NH3 sensor

    Hi kak Thank you for your useful help . A question : How can i calculate Rscal ?

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