“An air monitor that can measure CO, CO2, H2, CH4, NH3, Alcohol, Bangene, Acetone, Hexane, Toluene, Smoke and Flammable gas concentration.
For a long time, I wanted to monitor every component in the air only using low-cost MQ sensors. So I ordered a set of 9 MQ sensors and made this project, in which I can measure the concentration of many kinds of gas in the air only using some MQ sensors. This kind of sensor is not so accurate and needs lots of calibration, but they are the best cheap gas sensors out there. You can find a set of nine gas sensors for only $6 to $7. in my project, I use 6 of them and measure the gas concentration of 12 gases.”