Wiring Forum
All Forums => Wiring Hardware Questions => Topic started by: yolco on January 24, 2012, 04:24:35 AM

Hi,
I'm developing an enviromental station and I bought some winsensor gas sensors, as MQ135, I'm trying to do right measurements, but first I don't know if I wire them correctly, also the values they give me are strange.
At the second issue, the values measured, I need to know how to convert it to a right ppm values, because I understand that my arduino give me the values between 0 and 1023.
Could anyone give me some help about??
Thanks!!

hi, here is an example with the sensor you have: http://wiring.org.co/learning/basics/airqualitymq135.html (http://wiring.org.co/learning/basics/airqualitymq135.html) let me know.

Hi,
first of all, thanks!!
I already have the connections done, and I'm reading values from the sensor.
But now my problem is how I can interpolate this values to have the real concentration measurement.
So, I need a mathematical formula to do this, because the manufacturer only give a graphic with general values.
Do you have some formulas to do these measurements??
Thanks again!!
Regards.

Ok, I see, I don't have them, but let me look into it.