[PSUBS-MAILIST] flow meters

Tue Mar 13 18:24:00 EDT 2018

Brian, Rick,
GL is saying O2 consumption is 15 l/h resting, 40 l/h working & 26 l/h average.
(.43 litres per minute. ) Even my paediatric click regulator isn't fine enough by the
look of it, it does 1/4 of a litre, (.25) then the next step is 1/2 (.5) 
 You have got me rethinking this Rick. I might go with a flow meter so I can
finely adjust it & stop a potentially noisy O2 add system turning on & off
frequently.
Brian your 0-8 litre regulator seems to have the same increments in the low
range as my 0-4 litre regulator so you aren't loosing anything with it.
Alan

Sent from my iPad

> On 14/03/2018, at 10:07 AM, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> My medical O2 regulator goes from 0 to 8 lpm  ,  My scuba shop finally got my bottle filled !  They had lost a transitional fitting needed to fill the bottle so I've been waiting for about two weeks now.  It's a good thing they got the part because there is literally no other place around who will fill it !    Don't ask me how or why they are so easy about filling the O2 but I checked every other dive shop within 100 miles and nobody would do it.  Believe me I'm not asking any questions, just thanking them for my fill  ;-) 
>  
> Brian
>  
> 
> 
> --- personal_submersibles at psubs.org wrote:
> 
> From: Rick Patton via Personal_Submersibles <personal_submersibles at psubs.org>
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] flow meters
> Date: Tue, 13 Mar 2018 10:39:44 -1000
> 
> Alan,
> 
> So you have the second one you listed so you are bringing the HP 02 right up to that?
> 
> Rick
> 
> 
> 
> On Tue, Mar 13, 2018 at 10:08 AM, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> Rick,
> just looked at my 0-4 LPM paedeatric click style oxygen meter & it says 
> "maximum pressure not to exceed 2600 psi."
> Alan
> 
> Sent from my iPad
> 
> On 14/03/2018, at 8:13 AM, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Rick,
> as you say "above ambient" so at 350' depth you will have 130psi
> coming out of the regulator plus another 175psi for the ambient depth.
> EMT have this...https://www.emtmedicalco.com/GENTEC-OXYGEN-FLOWMETER-WITH-REGULATOR-0-15-LPM-CGA-870-OR-540-191M.htm
> I bought a pressure regulator for inside the hull to deal with that,
> however the click style paediatric regulators they have take a high inlet pressure
> although I can't see any literature on this at EMT.....
> https://www.emtmedicalco.com/PEDIATRIC-REGULATORS-0-4-LPM-CGA-870-8704.htm
> Alan
> 
> 
> Sent from my iPad
> 
> On 14/03/2018, at 6:53 AM, Rick Patton via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Was looking into buying an 02 flow meter yesterday online and was told that the incoming pressure to the meter had a max incoming working pressure of 50 psi. My bottles will be on the outside and I have two 02 cleaned first stage regulators that will take them from HP to LP then into the sub.
>  I guess the average LP setting is  around 150 psi + -above ambient? so I should be able to have a dive shop re set them down to 50 psi? What have others done that have the same scenario and wonder if there are flow meters that can take the 150 psi in?
> 
> Rick
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