Hello, I am new to arduino. I wanted to do a project for school. So what i wanted with arduino is to measure the level of oxygen in the air. I see a little sensor and other things that measures oxygen, but that sensors costs much and if so, it will be not effective. So i reached at mq135 air quality sensor which measures NH3, NOx, alcohol, Benzene, smoke, CO2, etc. but cant see oxygen there. I dont know is that possible, if please help me.
if not possible, let me know and if there, please give other ideas.
So, hopes that you will help me.
Thank you.
Have you read this thread?
anshadrazak:
Hello, I am new to arduino. I wanted to do a project for school. So what i wanted with arduino is to measure the level of oxygen in the air. I see a little sensor and other things that measures oxygen, but that sensors costs much and if so, it will be not effective. So i reached at mq135 air quality sensor which measures NH3, NOx, alcohol, Benzene, smoke, CO2, etc. but cant see oxygen there. I dont know is that possible, if please help me.
if not possible, let me know and if there, please give other ideas.
So, hopes that you will help me.
Thank you.
Well, you do have a problem, then. If O2 sensors were cheap, you would find them everywhere. What is you actual budget? I once bought a very expensive N2 generation system. It had a O2 sensor to measure the O2 in the gas being produced. A VERY low O2 level meant the gas was almost pure N2. A factory engineer atempted to calibrate the O2 sensor, but bought only two cans of pure O2 and that was about 5 cans short of the needed volume. So you have two problems: the price of the sensor and the price to callibrate the sensor.
Paul
PS. I might add that O2 sensors are very slow to react. The O2 callibration would have taken 10 minutes to allow the O2 sensor to stabilize to the current O2 level.
The cheap MQ series of sensors cannot be used to measure the concentration of a specific gas in air.
They all respond to several different gases, are unstable and generally unreliable.
They can ONLY be used to warn you if something in the air changes rather dramatically, and it would be just plain stupid to trust them for anything.
1 Like
Paul_KD7HB:
Well, you do have a problem, then. If O2 sensors were cheap, you would find them everywhere. What is you actual budget? I once bought a very expensive N2 generation system. It had a O2 sensor to measure the O2 in the gas being produced. A VERY low O2 level meant the gas was almost pure N2. A factory engineer atempted to calibrate the O2 sensor, but bought only two cans of pure O2 and that was about 5 cans short of the needed volume. So you have two problems: the price of the sensor and the price to callibrate the sensor.
PaulPS. I might add that O2 sensors are very slow to react. The O2 callibration would have taken 10 minutes to allow the O2 sensor to stabilize to the current O2 level.
i have some doubts.
does that sensor requires like 7 cans of gas to measure?
okay, really i am a 14 year boy.(i am not that intelligent)
Is there anyway out there to measure oxygen level in the air and also should cost lesser that 10000 rupees. (136 US dollars)
is that possible or not?
and is this possible with this sensor https://www.dfrobot.com/product-2052.html
and ofcourse thank you very much for helping me and hopes u help me for this too
Other post/duplicate DELETED
Please do NOT cross post / duplicate as it wastes peoples time and efforts to have more than one post for a single topic.
Continued cross posting could result in a time out from the forum.
Could you also take a few moments to Learn How To Use The Forum.
Other general help and troubleshooting advice can be found here.
It will help you get the best out of the forum in the future.
The documentation for the board is based on an assumption, not an actual calibration. "The oxygen sensor can be calibrated using the characteristic that the oxygen content in the atmosphere is 20.9%.". That assumes no air pollution, etc.
Paul
is this possible with this sensor https://www.dfrobot.com/product-2052.html
I would not trust that sensor for any application related to safety of animals or humans. I could find no documentation on cross-reactivity to other gases, or actual performance tests on the product site.
What, exactly, are you trying to do for your school project?
This topic was automatically closed 120 days after the last reply. New replies are no longer allowed.