Good day fellow Arduinerds,
I have some questions on using MQ sensors. I purchased a lot of 9 MQ sensors from Amazon (MQ-2 thru 9 and a 135 sensor). I'm going to use the MQ-2 sensor as the example here. In my research and according to the manufacturers datasheet (https://www.mouser.com/datasheet/2/321/605-00008-MQ-2-Datasheet-370464.pdf), the very first complete (and only) sentence under the "Applications" section, specifies the sensor is used for detecting: LPG, i-butane, propane, methane ,alcohol, Hydrogen, and smoke.
So with a bit more research and checking YT, I noticed that the MQ-2 sensor was being used for LPG, Smoke (which was fine), and .. CO, which... I can't tell if it's CO2 or genuinely CO, and it's not mentioned in the datasheet. So that makes a bit of a quandary here.
So I have ask a few questions here.
1 - Those who have used MQ-2 sensors, what exactly does it measure, because there seem to be some discrepancies between the datasheet and what it actually measures.
2 - If it does measure more than LPG, Smoke, and CO (whatever CO is), can I pull that data from the sensor as well? And how would I go about doing that?
Thanks in advance for any information.
- Josh
Edit to add: This is from the datasheet as well:
Detecting concentration scope：
200ppm-5000ppm - LPG and propane
300ppm-5000ppm - butane
5000ppm-20000ppm - methane
300ppm-5000ppm H2
100ppm-2000ppm - Alcohol
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