Product review (5 stars): Possibly a life saver!
This meter is great! Using this to monitor our house air which turns out was on the high side - 1300(+/-100-200) With this meter we now open windows once it reach's 800 or so. Or leave them open when we can. Once the air is back down, usually around 400, we'll close the windows. Amazingly we have been feeling much better! Never would have known about our air quality being so poor if it wasn't for this meter. I am now also hunting down reasons why our air will climb so high ???