FORENSICS DETECTORS FD Ozone Detector by Forensics | USA NIST Calibration | Dust & Explosion Proof | USB Recharge | Sound, Light and Vibration Alarms | 0-20ppm O3 |

The unit apparently was calibrated and operated properly. However, after discussion with the company we found it is not sensitive enough for use in home ozone detection that might be produced by electrostatic air cleaner in central air conditioner

Good detector for most ozone concentrations, but if accuracy below 1ppm is required, look elsewhere.

Does exactly what its supposed to do. Detect ppm of o3. Rugged construction and quality operation. Would buy again.

I use this meter to sanitize an office building with ozone. It is very responsive and accurate against other O3 meters.

Worked like a charm. Very simple and quick to give you a reading.

Very simple, not very accurate.No recording feature

Works just as described

Easy to use