Nitrox analysis with sensor tee

[wKkaY]

What's the correct way to use an analyzer with a tee like this? When the end of the tee is capped lightly with a thumb, the O2 measurement increases by about 1% compared to without it.

 

[tbone1004]

@wKkaY leave it open. Remember that sensors measure partial pressure of O2 not fraction of O2. When you plug the end, you are increasing the pressure inside of the T which increases the ppO2 inside the chamber.

 

[rhwestfall]

and the reading also changes with velocity of air...

I don't like that....

OhyCheq makes/made a spin on barbed cap that, in conjunction with a QD flow limiter makes for a repeatable implementation.

YMMV

 

[MargaritaMike]

and the reading also changes with velocity of air...

I don't like that....

OhyCheq makes/made a spin on barbed cap that, in conjunction with a QD flow limiter makes for a repeatable implementation.

View attachment 500722

YMMV

I'm STOOPID and feeling really old. Does OxyCheq make the unit already with the QD flow limiter or do I have to find the QD flow limiter and put it together. Thanks.

Cheers -

 

[MargaritaMike]

I'm STOOPID and feeling really old. Does OxyCheq make the unit already with the QD flow limiter or do I have to find the QD flow limiter and put it together. Thanks.

Cheers -

@rhwestfall Nevermind. My brain fart passed. I have it worked out. $40 plus shipping. The shipping kills me.
Thanks anyway.

Cheers -