FD-O2BOX

Oxygen Analyzer… I purchased this to see the percentage of O2 output from oxygen concentrators. It was easy to set-up; it worked like a charm, and it is accurate! Thumbs up!

Worked fine when first purchased. Quick and easy to analyze mix. Used on two dive trips then put away for 6 months with batteries removed. Then it would not calibrate to 20.9% . Used new batteries still not working properly. I think the sensor may have died. Contacted manufacturer through their website e mail. Sarah got back to me within one day with a recommendation to fix issue. When that didn't work she immediately arranged for a replacement unit, which I received within a week. A good product but even better : Great customer service!!

I ordered the detector in June but didn’t use it until September. The readings I got were much different than the dive shops. When I got home I contacted Forensics customer support and they sent me a new one within a few days. The new one works fine. Forensics customer support was very helpful.

I so wanted this meter to work since it is fairly inexpensive and comes with a nice case but I think the sensor was bad and I can't trust it. I received the meter and the batteries were dead as many of the other reviews have noted. I can't believe they haven't fixed this simple flaw yet! I put 3 fresh AAA batteries in and turned it on and calibrated as directed. The reading was 21.4% before I calibrated and 21.4% after I calibrated (should be closer to 20.9%). I had a feeling there was something wrong with the meter. I contacted Forensics technical support via email and got no response after 4 days. Fortunately I took it over to a local dive shop and tried it on a tank of nitrox with a known oxygen content of 32%. Put the meter on and waited about 20-25 seconds before the read out moved. It went up to about 26% but no further. The shop worker's meter only took about 5 seconds to register ~ 32%. I sent it back and purchased a different brand before I went diving.

Great accessory for going Nitrox.

If you use O2 for any use, This product is a must. Easly to use. Check your medical devices, such as O2 generators to make sure the give you the right amount of O2

The product seems to not have any measurements adjustments. When the gas pressure increases just a little bit, like 1 psi, indicated value also increases. But the gas composition is actually the same. Assuming the dynamic pressure near scuba tank valve oscillates much more than 1 psi, I would not trust the measurements. Or at least would not consider them "with error < 0.2%". What they had to do, is adding an absolute pressure sensor (and probably temperature) and adjust the raw values for the gas thermodynamic state. Sorry I have to return this.

Ok so here's the deal: I am on o2 therapy. Wanted to actually test the large concentrators vs the tanks vs the travel ones I have decided to purchase because let's be honest even pacing through my insurance to rent theirs stiff is a scam where the sales guy is literally making a living off me renting them each month. Everyone needs a job but I don't consider myself an employer. Just my personal 411. So this handy little device seems to be pretty accurate when I measure my sats while using it. I have way more I could write but i will wait to see if anyone Actually wants me to go into detail here before I literally fill a page with useful(less to some) info and stats. So in order not to waste anyone's time,, I will be happy to update when I see a notification that this review is marked as helpful. If not, ill save my useless(full to some) info for elsewhere.

Perfect analyzer for the price point really happy with it. Works extremely well for dive cylinders. N.B Fedex deliver this item to UK from Greece and charge you almost £46 ontop of the purchase price, which Amazon do not tell you so be aware of this fact when ordering