8631620 EZ-1X Ozone Monitor, Continuous Duty

Excellent, accurate and affordable. Works better than expected based upon reading the instructions. The response time is very fast, 2-3 seconds and it is very sensitive - the scale begins to read well before the ozone level is high enough to be irritating to me. The colors match the level of nuisance very well too - red is definitely get out of there but still MUCH lower than the ozone generator puts out - the sensor shoots to red in a snap if you pass it in front of the ozone generator (it does take a while to come back down when it is real saturated though). I put it in the bedroom when I use the ozone generator so that I don't have to guess whether the level has gone down enough to go back in yet, also to verify full circulation - Nice. A great functional and educational tool for using ozone in modern housekeeping.Note: The product image is incorrect, it looks similar but is not the EZ-1X, I think the product shown has become obsolete.

Work well but not accurate

I am about 20 days trying to see if it works, doing everything as the manual says, warm-up etc, but no chance. I put ozone in my room just to see some change on it, but nothing happens. Frustrating. Now I want to send it back and get my money. It does not look good and does not work, that is it.

The product never worked. We have never got a reading so I decided to have it tested to see if it could get a reading. We put it in an ozone chamber for 20 mins and it never moved off zero. Because I thought it was working.... now it's too late to return. Super waste of money.

it's very good for my work . i have bought 10 EZ-1X and will order this item more for my company.thank you so much.

Never moved above zero. Tested in smog all through its sensing range over the last month. Too late to return...

Excellent, works as designed to detect ozone, just wish this handheld model had a audible alarm.

good