If you are constantly monitoring the live PM2.5 from the monitor’s display the sensor’s hot all the time and its life would get reduced. Overall this device is a bit more expensive than I would like it to be but in the lack of any serious competition I would suggest purchasing this if you are in the market for a decent air quality monitor.

https://www.amazon.com/Monitor-Pollution-Monitoring-Temperature-Compatible/dp/B077JWYJTV