All about Oxygen O2 Analyzers, including DIY

[Genesis]

I just built one, and stuffed it in a Pelican case.

It cal's out within 0.3% on 100% O2 when calibrated against air at 20.9%. That's closer (by 0.2%) than the $300 Minox-I that is at the LDS

Needless to say I'm very happy, especially considering that the sensor was $80 of the $90 total cost!

About a half-hour for me to put it together electrically; the box took me about an hour to do the cutouts for (square holes are a biatch to get right in plastic; I don't have the right tools to make it easy around here.)

This is what it looks like completed...

Strongly recommended; don't give the thieves their 300% mark-up on a "commercial" unit.

 

[jacek]

has anyone used this product ? is it any good ?

http://www.onscuba.com/Gear/Handi/handi.html

thanks
:bonk:

 

[Finesse]

I have used this one (going to buy one) and the model that you place against the valve on the tank. I like this one for several reasons.....first of all its small and only has the calibration knob on it...just seems like it would handle more abuse.....the real nice feature is the hose that clips into you inflator hose.....snap onto the end of the inflator hose and open the valve.....the gas is self regulated so there is no chance of too much/not enough air flow..the flow rate is set for you.. My buddy told me that the O2 sensor lasts longer than some other models out there....(depending on use)

The negative is you need your reg hooked up to analyze the gas..the other thing was it was a little difficult to turn the adjustment knob to calibrate it....

 

[Stone]

I noticed that the battery is not user replaceable. Can you return it to the company to replace the battery and sensor?

I still like the DIY Oxycheck kit for $100. It has a user replaceable battery, user replaceable O2 sensor, and accuracy to 1/10 percent (maybe).

The Oxyhacker Handbook has a description for a DIY adapter that allows checking FO2 straight from the valve which would work for either model.

 

[ericfine50]

The Handi is a use it till it is dead and then buy another. I like the Oxycheq stuff from his DIY to the He/02 analyzer.

Eric

 

[Larry M]

Well using my PrO2 Oxygen Analyzer ( 8 months old) On my Nitrox Membrane system I noticed that the oxygen reading at the PrO2 Oxygen Analyzer was over 40% and starting to fluctuate wildly from 38% to the 40s this didn't seem right for the settings on the system so I checked with the second PrO2 Oxygen Analyzer and it showed a steady 38% I changed out the bad PrO2 Oxygen Analyzer and found that it was giving false readings of about 5% when testing tanks and would fluctuate wildly when Analyzing on the Nitrox system ....Interestingly it would appear normal for a few readings and then fail it wasn't dropped or damaged in any way and just started suddenly doing this .....has anyone had similar problems with the PrO2 Oxygen Analyzer

 

[joens]

last night I put together my analyzer kit I got from Patrick Duffy.
All I can say is wonderful. the instructions were easy to follow .I could have had a little more light at the dining room table but it took me 3 hours to put it together . I was planning to gather all the parts from oxyhackers guide . but I decided to get the kit .I would reccomend this kit to anyone who needs an O2 analizer and doesnt want to spend too much .
chris joens

 

[Epinephelus]

Where'd you get it?
E. itajara

 

[lucid]

www.oxycheq.com

 

[salty]

I would like to secound Joens statment.
I built mine about 3 months age and it was so quick and easy I wanted to do another. Its not worth trying to source parts your self as the savings amounts to spare change.
Its an awsome kit and assmbles to be a good product. The best is compairing it to friends $300 analisers and getting the same readingut: . I got all fancy and made my own sampler and put it in to a dry box with some custom fitted foam lining.