MQ-9 Sensor

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MQ-9 Sensor

Postby hi99 » Sat Sep 27, 2014 10:45 am

hi everyone,wat is the arduino code to convert analog reading to ppm?tq :oops:
hi99
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Re: MQ-9 Sensor

Postby yonghui » Mon Sep 29, 2014 10:23 am

this is another datasheet by seeedstudio http://www.seeedstudio.com/wiki/images/f/f2/MQ-9.pdf

from what i read, you can covert it to a relative ppm of LPG, you can refer the chart Rs/Ro vs PPM
thanks&regards,
yh
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