I’m looking to measure the percentage (or PPM if that’s easier) of oxygen air (in a room). I know there are specific sensors to do this but they are costly, and I have free access to automotive oxygen sensors (used for the engine control module in cars).
Does anyone know if they can be used, or what their output is, or anything along those lines that would give me a start in designing an Arduino display? If I can get the specs or electrical datasheet, I can design the circuitry to take it from there and turn it into a display-able result.
But any information on automotive oxygen sensors isn’t intended for someone to try to design around the sensor but rather which vehicles they fit.
Using an automotive oxygen sensors for ambient measuring could be difficult because it needs a high temperature (about 300-400 C) to work properly. The another problem that the sensors are not a precisice instrument for wide concentration range, in most cases it just reacts to predefined optimal concentration and works as a trigger.
Yes. Looks like automotive O2 sensors are not going to work for this application. I could live with the temperature requirement (some have built-in heaters) but the measurement range is too limited. Thanks.
I took a look - if I’m going to have to purchase a sensor (vs using the free automotive sensors I can get) then I’ll likely go with a $35 sensor from Mouser. Thanks.
Sure. I’m actually trying to monitor the oxygen level in an enclosed area to determine if/when it becomes oxygen deficient. So I’m looking to measure O2 in the range of 20.9% (normal air) down to maybe 10%.
