You've touched on the shortcoming of the system. There is no
indication of actual flow to the mask (I am assuming the mask as the
worst case). Red/Green indicators are worse than worthless because
they may decrease the delivery.

Use an pulse oximeter with the system.


In article , "dusty"
wrote:
I have had occasional problems. My breathing does not always activate the
sensor so that no squirt of oxygen is receive. I had the experience of
flying most of the afternoon at over 17k and noticing toward the end that I
felt like I had hypoxia. But I would take a breath and look at the EDS and
get the green light so everything seemed ok.

I do not hear too well at certain frequencies. But during the afternoon I
kept hearing (barely) a buzzing. Finally I realized that my EDS was saying
that there was a problem.

After some investigation after landing, I realized that when I would 'check'
the EDS by inhaling, the inhalation was slightly larger than my normal
breathing. This would activate the EDS. My normal breathing does not always
activate the EDS.

Changing the cannulus and tubing seems to helps for the first time or two
but then it begins not always noticing my inhalation.

I do have to use a sleep apnea machinge. Maybe there is some relationship.


Later I notice
"Simon Waddell" wrote in message
...
Christmas is a-comin' etc. and I'm thinking of replacing my old A14
diluter
demand system with a Mountain High EDS system. The A14 hasn't been used
for
years; now I'm living in the mountains I want something I know I can trust

Can I trust the EDS system? Anybody out there got anything good or bad to
say about it? Should I swap my old steel bottle for a new one - if so,
aloominum or kevlar? I like the idea of the canular - is it reliable?