[PSUBS-MAILIST] Gauge for outside viewport?

[Alec Smyth via Personal_Submersibles]

Thanks Stephen, that is certainly a good lead. I suspect the same one is
being sold here under different branding, so have emailed a vendor.

On Mon, Sep 21, 2015 at 8:29 AM, Stephen Fordyce via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Hi Alec,
> Yep, I'm definitely speaking of submersible pressure gauges (SPG).  I have
> these ones, or at least very similar:
> http://www.deepstop.de/en/deepstop-products/1144-deepstop-300-bar-oxy-minera-spg.html?search_query=gauge&results=32
>
> Possibly it's the "minera" or "mineral" keyword you're looking for.
>
> I have friends that occasionally dive to 200m and they've not reported SPG
> problems.
>
> Cheers,
> Steve
>
>
> On Mon, Sep 21, 2015 at 10:12 PM, Alec Smyth via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>> Hi Steve,
>>
>> I have three of them on hand and all three are 1 atm air filled
>> enclosures. Note that SCUBA depth gauges are oil filled, but I'm speaking
>> of SCUBA tank pressure gauges. I do know oil filled ones exist, I just have
>> not found any of that sort yet.
>>
>> Thanks,
>>
>> Alec
>>
>> On Sun, Sep 20, 2015 at 11:21 PM, Stephen Fordyce via
>> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>
>>> Hi Alec,
>>> SCUBA gauges are actually oil filled (I have broken a few) and as far as
>>> I know have been taken unmodified on record dives as deep as 300m/1000ft,
>>> with no problems recorded.
>>>
>>> Cheers,
>>> Steve
>>> On 21/09/2015 1:04 PM, "Alec Smyth via Personal_Submersibles" <
>>> personal_submersibles at psubs.org> wrote:
>>>
>>>> I have an interesting thing to think about and wondered if any of the
>>>> PSUBS brain trust might have a suggestion.
>>>>
>>>> One of the simplifications on my new sub is that all HP air lines are
>>>> external, aside from the BIBS (which is normally shut off anyway). Thus,
>>>> I'm looking for a 3,000-4,000 psi gauge to mount outside a viewport, like
>>>> in the Pisces photo that I'll paste below. In case my paste doesn't come
>>>> through, it is the one at the top of the following article:
>>>> http://www.nytimes.com/2015/09/15/science/piloted-deep-sea-research-is-bottoming-out.html?_r=1
>>>>
>>>> The first thing that came to mind was to use a SCUBA submersible
>>>> pressure gauge, but the problem is these are normally 1 atm dry enclosures
>>>> of limited depth rating. There is generally little information posted about
>>>> how deep they'll go, but what I did find was mentioned 260 feet for the
>>>> plastic ones and 490 feet for the brass variety. This is a 1,000 foot sub.
>>>>
>>>> The second idea was to use oil filled gauges intended for above-water
>>>> use. But these generally have considerable bubbles in the oil, are not very
>>>> good at keeping the oil inside, and have other hardware not intended to
>>>> live long in sea water.
>>>>
>>>> Any suggestions would be most welcome!
>>>>
>>>>
>>>> Thanks,
>>>>
>>>> Alec
>>>>
>>>> [image: Inline image 1]
>>>>
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>>>>
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>>
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>
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