pnaven03
Posts: 139
Joined: Thu Feb 16, 2017 5:21 pm

How to convert adc voltage to PPM in MQ sensor

Fri Oct 12, 2018 9:51 am

Hi Team,

I am using raspberry pi 3 board and connected adc device (mcp3008) using SPI0 bus. We are able to adc data from sensor. How to convert this adc voltage to PPM, Please provide me formula or links.

Regards,
Nv

Brandon92
Posts: 534
Joined: Wed Jul 25, 2018 9:29 pm
Location: Netherlands

Re: How to convert adc voltage to PPM in MQ sensor

Fri Oct 12, 2018 3:41 pm

Here you can find the formula the change the adc value to the "real" input voltage. And about the translation to ppm. You need to read the manual / datasheet of that specified sensor. They will tell you the ratio between the output voltage and the PPM.

danjperron
Posts: 3095
Joined: Thu Dec 27, 2012 4:05 am
Location: Québec, Canada

Re: How to convert adc voltage to PPM in MQ sensor

Fri Oct 12, 2018 5:18 pm


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