Some students of mine made a methane sensor with the mq 4. THis is how they tried to convert the analog values to ppm: Since the closest thing to a known methane value that that they had available was straight natural gas coming through the line to a valve in the chemistry lab at the school, they u…

conversion to ppm for methane sensor

mistergreen April 6, 2014, 12:55am 4

If you guys have a little money to spare, use an infrared sensor.

It's a dual CO2 sensor too.

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