Oxygen Detector by Forensics | 2 Year Battery Life | 3 Year Sensor | USA NIST Calibration | Drop-Proof & Water-Proof | Rubber Soft-Touch | 0-30% O2 |

I've been using these for years in our winery, which is very humid and relatively harsh conditions overall for an oxygen meter. Gassing fermentations to 0% Oxygen using Nitrogen and Argon - the air going through the unit is humid and has some alcohol, so it is hard on the unit. Any time the units have had issues, the customer service has been excellent and they have replaced units even after warranties expired.

Purchased this a year ago for our NMR room. We have a large tank of liquid nitrogen that often tends to vent in a closed room. Therefore, it is helpful to know before entering the room what the conditions are. I have to say, for a small room, it's not super sensitive, even if you wear it on your person. After a year, the battery needed replacement and continual replacement afterwards. After replacing the battery and recalibration, it wouldn't read the correct O2 percentage for the room. I like the overall design. To set up/calibrate/maintain is not easy. I think this would work better if you are working in smaller areas, however, this wasn't sensitive and responsive enough for what we needed.

Very good design, great monitor for our green house air.

I am using this oxygen detector for my own personal in-home use. However, my experience with it has led to the rating, primarily due to challenges encountered during setup and perceived limitations in its performance. For me setting up the Oxygen detector proved to a bit of a challenge, and it became apparent that careful attention to the instructions is crucial. I would advise read and follow instructions diligently to ensure proper functionality. The device features as being drop proof and waterproof, which is commendable for ensuring longevity. I say it offers durability features and a reasonable measurement range, the challenge in the setup is perceived inconsistency in performance for myself.

We live in an urban environment, and over the past few years we've been upping our air quality game. This includes adding high-quality filters to our HVAC, getting two top-notch air purifiers, and adding an air quality sensor. I thought that this Oxygen detector could give me an additional indication of our air quality and also let me know if our air is significantly sub-par. While I do think it has serves its purpose (our air seems to have the correct amount of Oxygen), it may be a more technical tool than I need. The fact is that this meter always reads 20.9 when sitting in our home. This is the correct amount of Oxygen. I can definitely see that the meter works by testing it: If put it inside a sandwich bag and then breathe into the bag, the number goes down. This makes sense, since we exhale a combination of gasses with less Oxygen than what we inhale. Bottom line: This meter seems to work very well. I recommend it for a pro who really needs a good instrument.