Hello people!
I started to use Arduino for a few months in college and I like it so much I wanted to buy one for myself and after some time I discovered the MQ-135 sensor but I want to know exactly the level of PPM of NH3,NOx, alcohol, Benzene, smoke,CO2 like when is it present in the air and how much based on that PPM because I want to make a graphic evolution of NH3,NOx, alcohol, Benzene, smoke,CO2 found in the air outside my house. Can anyone help me?
I only found that it starts from 10 for every one of those but i want to know exactly for each one.
Thank you!
The MQ-135 responds to several different gases. If the MQ-135 readings change, without additional information it is impossible to say which gas might be causing the change.
You will need specific sensors for each of these gases.
Expect each of those to cost 10-100 times what an MQ135 costs (though I may be underestimating the cost of those sensors).
The MQ 135 Air Quality Sensor while fine for basic hobby applications is hardly a sensor which will give you accurate numbers. Even with known gas samples, which are expensive, they do not have very good repeatability. I have to agree with wvmarie and figure even higher cost plus sample calibration gasses it's an expensive proposition.
Ron
wvmarle:
You will need specific sensors for each of these gases.
Expect each of those to cost 10-100 times what an MQ135 costs (though I may be underestimating the cost of those sensors).
I understand, thank you very much!