Temtop S1-up Indoor Air Quality Meter Temperature and Humidity AQI PM2.5 Monitor with Accurate Sensor

I bought this to check air quality in my house as I have a log burning stove and wasn't sure if this produced particles either inside the house or out. Inside air quality seems good. Outside the air quality depends on traffic activity but does not seem to be affected by whether or not I have the fire lit.

The air quality meter is well made and functions exactly as I hoped. I was able to prove the air pollution caused by a farmer neighbour burning plastic etc in a skip. It is helping my case in conjunction with my local environmental health officers.

Living in central close to a very busy Rd. I found this instrument extremely useful.
It allows me to monitor air quality at different times of the day and night . The variation is quite extraordinary, allowing closure of windows atbtimes