PO2 displays - any I've missed?

Sutty

I've had a few niggles with the Jetsam PO2 displays on my Kiss, so thinking of alternatives - so we have...

Jetsam originals

Sartek

Subsea Systems

Mark Munro's

Shearwater

Any I've missed?

Thanks,
Neil

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Stephane

Yes, there is the Hydro-Space Explorer 1 or 3 cells PpO2 meter (www.hs-eng.com) and the rEvodream (2 cells + HUD) from Paul Raymaekers (http://www.rebreatherworld.com/photo...r/397/cat/500).

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Stéphane
Hammer-rEvo powered!

2_Dive

Have a look at:-

http://www.sump4.com/rebreather/d5_c...ml#electronics

Regards

Dave

Ben Field

Which version of the Jetsam displays do you have? IIRC there are two types of casings and at least four types of PCB's.

I only came across this diversity when getting my 3rd generation displays in 2nd generation casings repaired.

It would seem a few additional "issues" arose with the move to the clear display casing and black twist on/off backs, most seem to have been resolved with the latest set I have. I believe the material of the clear casings has been changed and the screw holes and screws are longer as standard, the twist on/off switch also seems more robust.

More interestingly the PCB's inside are now unpluggable, I think this must be the 4th revision to the PCB's?


I'm relatively happy with this setup apart from the batteries, which seems to be a constant problem, the voltage drop with age seems to badly degrade the displays PPO2 monitoring performance and much faster than the 20hours plus which is often banded around (hence iminent arrival of Shearwater computer )

BEN

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Sutty

Mine are the clear cases with twist back, I have the soldered-in electronics, though I got a spare which is the pluggable one.

One flood was due to user stupidity, another I'm not sure of the cause but may have been the black back, the 1st one which was due to a crack in the clear plastic which was then replaced under warranty.

I suspect the "counting error", where the display shows an incrementing number is due to moisture on the board. If you have to re-cal when the display is wet then no matter how well you try to dry it I suspect some moisture can be sucked in when the cal port is opened.

I'm put off the HSexplorer PO2 monitor partly because of tales I've heard about their computers flooding, and partly because it looks like it only displays one value at once.
The Subsea systems display looks nice but they don't want to tell me the input impedance which is a bit off-putting. I suspect it would be OK.
The Sartek units appear to calibrate by opening a port too, so I could get the same problem.
The Shearwater looks very nice, and gives deco information too. I think you can only calibrate in 100%O2 though, it would be nice to be able to specify the cal gas. In the red sea I was only getting 95% O2 last trip.
Do you know how you replace the battery on the Shearwater?

Neil

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Stephane

I have the HSE Po2 monitor and the previous owner (J.V.) told me despite it has the same case than the HSE Explorer computer, it has never been flooded.
Yesit does onlyhave one cell displayed at a time but it is not very disturbing as it is quit easy to remember two values whitin a 5 seconds time, even underwater. :hehe:
But as soon as I will have enough money, I will go for a rEvodream.

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Stéphane
Hammer-rEvo powered!

Ben Field

Ditto- exactly in fact! Jetsam replaced the entire set though- you've gotta hand it to them their service is superb and I believe the product is improving all the time too.

Yup, although when I got this error it was after I had taken my displays diving with the water cooling feature enabled (ie- inexplicable flood )

I'm reliabley informed it requires you to remove the front cover... slightly alarming but then allegedly you'll only need to do it every 2years or more! It would seem to rely on a conventional compression o-ring too, unlike the slightly less conventional design of the Jetsam displays.

BEN

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Beware Fridge Suck

paulraymaekers

I find it very important not having to open the casing to do a cal!

With the rEvodream all settings, calibration is done by a tapping sequence on the box that contains the LCD, while getting feedback from the HUD.

and no, during diving you can not get into setup or cal accidentally :-)

regards
paul

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MHD

Funny you mention this, I flooded a brand new one on the weekend due to the selector at the back being able to turn to calibrate without any need to to move the positive locking mechanism aside to allow it to go that way.

The unit could be turned from off to either on or calibrate just as easily, and I turned it on with out looking and set it to calibrate and jumped in. Rather less than impressed. lucky I notice it on the surface going erratic, got out and stripped it on the spot. About 3 drops inside, so hopefully the immediant strip down and cleaning saved it

Matt

Sutty

Any more info on the rEvodream? A bit hard to make out from the photos, it looks like it only shows one cell value at a time. Is it available without the HUD? Can it cal at less than 1bar PO2? What about battery replacement? etc, etc

Neil

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