Draeger

[MATTBIN]

Anyone used either of these and got any comments,
come to that anyone got any comments even if they havent used one, i.e. what does your mate down the pub reckon  

Cheers peeps.
Matt

[Digger]

<font color='#000080'>Nitrox is pretty handy for info on the Dragers. He likes em. Maybe he'll be along in a bit.

[Alan57]

I got a Dolphin cert in 1998 and found the preparation time and the maths involved in working out what I was breathing to be a pain.
These comments became reinforced when I got an Inspiration. The prep and cleaning were more involved as was the set up in comparison.
The work of breathing was harder in normal swimming due to the positioning of the counterlungs when compared to a Inspiration.
The depth limitation also did not suit my usual diving pattern.
Hope this helps

[MATTBIN]

Alan
thanks for that, am I mis-reading? Do you find the inspiration easier to setup, prep and clean. Hasnt the Daeger had a re-design to make it easier? Depth limitations - what exactly? I appreciate you have to select the correct 'jet' for the planned depth, unlike an Inspiration, and you are then limited because of pp02. As I understand it one of the Draeger has a max of 22m regardless, is this correct.

II am assuming also that because the Inspiration is morre popular the second hand value of a Draeger is very poor, correct?

Matt

[Alan57]

Matt
Yes, as I recall and I haven't dived a Dolphin for 5 years, so they may well have redesigned it, the cleaning of the 'lungs' was fiddly and required stripping down the set completely. The correct jet had to be chosen then the gas actually breathed calculated for CNS and Deco.
With the Inspiration the lungs can be washed through quickly insitu. I unscrew the hoses leaving one attached to the scrubber to seal against the elements. The set is hung up to drain and the scrubber taken to my hotel or cabin to dry out over night.
I find the latter protocol simpler to follow.
The depth limit on the Dolphin was nitrox limited to 40m whereas the Inspiration can go far deeper with trimix or a simple heliair mix than I ever expect to go! ( I mix a 10/50 heliair in my garage without needing to be O2 clean).
My preference is for the CCR route rather than SCCR in the form of the Dolphin. You should note here that these are the only two rebreathers I have personally used.
I'll have a look for the Dolphin manual in my loft and if I can find it I'll let you know and send it on to you for a look at the maths/theory involved if you want.
Finally the Dolphin I used did not have an Oxyguage as standard so unless this has changed I would now insist on one being present to know exactly what I was breathing.
Regards Alan

[nitrox]

<font color='#0000FF'>matty,

the dolphin come's with four dosage jet's, 32% 40% 50% and 60%. obviously with the correct dosage jet chosen, this allow's you to do 40m.

not 22m as you have been led to believe. the unit is sold with a CE mark and is rated for use up to and including 40M. more is possible if you like to tinker with yer kit!

the lung's arn't hard to clean! neither is any other part of the unit.

i can put my unit together just as fast as you can put yer scuba rig together.the only thing i would slag the unit for is.... it dont come with a po2 measuring unit. it is however perfectly safe to fly the unit without one, i do it regularly!!

it's a bomb proof tool and is far cheaper than anything else , on the market, ok! so it's been around a while and has become somewhat dated!!.....so what!! it work's and that's all that count's.

hth

trox

[Rob Evans]

Ere Mark, you got your Meg yet?

Cheers
Rob

[MATTBIN]

Trox,
Isnt the Ray the cut down version that can only be used to 22m? Ever had/used one?

I know its old, but its reliable and light weight. The PP measuring shouldnt be an issue should it, after all the jets supply a constant dose, so is it possible for the 02 content to climb?

Cheers
Matt

[wreckweasel]

Stocks may fall as well as rise. So may O2.....

The risk with SCR's is mostly around ascent or elevated workloads.....

High PO2 doesnt seem to be the major concern with CMF SCR's

[nitrox]

<font color='#0000FF'>Matty,

yeah, the ray is good for 22m and yes they are good, but are primarily designed for wet suit diving. &nbsp;although it is very easy to mount one on a good wing.

the po2 sensor issue has never really been an issue as far as i'm concerned, although i do own one. all i'm prepared to say is ....i dive a dolphin regularly without one and i aint come to any harm. although personally i wont go beyond thirty'ish without one. if you posess a sound understanding of nitrox? you will have no problem's.

the buoyancy of the unit and a different breathe than what your used to are your biggest issue's. Forget about OC and start again, in a while you will be wondering why you didnt do it sooner!!

welcome to the club!!

HTH

regard's

trox