How to test nitrogen dioxide sensor?

I have Grove - Multichannel Gas Sensor connected to Arduino Uno. I am able to read the concentration of NO2 in ppm. How can I test it? I want the values to go very high. Right now in my room, the reading stays around 0.08 ppm. When I put the sensor in my balcony the reading goes up to 0.15 ppm.

  • Thank You
    Aamir Nawab

Aamir12345:
I have Grove - Multichannel Gas Sensor connected to Arduino Uno. I am able to read the concentration of NO2 in ppm. How can I test it? I want the values to go very high. Right now in my room, the reading stays around 0.08 ppm. When I put the sensor in my balcony the reading goes up to 0.15 ppm.

  • Thank You
    Aamir Nawab

Until you calibrate the sensor, the readings are meaningless!

Paul

To get the values to go “very high” you need to find a source of NO2. Check out a chemical lab near you, maybe they have it. If you pay enough you may even get to play with it.

Without calibration your readings are indeed probably only qualitative. I don’t think Seeed has been calibrating them for you.