Alright, after having done some research on effective, long-term measurement of air quality, I am here to give you some bad news. Your sensors are going to bre

Alright, after having done some research on effective, long-term measurement of air quality, I am here to give you some bad news. Your sensors are going to break. Depending on the environment and the mode of operation of the sensor, you'll see between a one month and one year lifespan. Why? Exactly because of the thing you want to measure: dust, oil particulates, water vapour and chemical reactions will quickly deteriorate the accuracy of the sensors. To properly protect them you will need at least a moisture trap and some kind of air pump to get a constant flow of air through your sensor. You most likely also want to filter out large particulates (if you're interested in sub 2.5 micrometer measurements). That said, you can [1] get quite accurate readings from the sensors within their specified operation environment (sub 80% Relative Humidity). [1] https://www.mdpi.com/2073-4433/10/2/41/pdf-vor https://www.mdpi.com/2073-4433/10/2/41/pdf-vor