Shallow water depth gauge

[high_order1]

So BC (Before Computers) we always used a bourdon tube depth guage for, well depth, and a capillary depth guage for accurately measuring deco stops in the 10 to 30 foot range. Those simple plastic air-line tubes with an air/water line interface indicator were amazingly accurate shallow, not so accurate beyond 30 feet. I went to look in my bin-o-parts to get a photo, but didn't see one. My 2psi. M

Thanks!
I had made the assumption that geared diaphragm gauges superseded both of them for accuracy or or robustness. I have seen a few, but none of them looked like they had much life left in them.

I have little else but time, so, the search continues

 

[agilis]

As in an analog gauge? Those went out of style a few decades ago now.

Analog is superior to those simpleminded number gauges, just as script is superior to print.

 

[iain/hsm]

It's got a glass face, radioactive phosphorous, I mean look at it, but not for too long
A girlfriend bought it for me fifty bucks, thanks that girlfriend

Maybe she wanted to get rid of you but it just took too long.

I would have suggested she used a Tritium dial with a half life of 12 years.
That way she could suggest that the Helium-3 it decays into could be used in your rebreather.
Love Eh

 

[boqurant]

If you have money to burn: Go Deep! Hands-On With The New Oris Depth Gauge (2nd Generation)

 

[happy-diver]

Just a bourdon tube where the gas transfer in and out is slowed by a ceramic filter in the brass thing

that screws into the back of the housing, a half inch long pencil lead sized bit of fired porous clay or something

Moved 2000km, she's still chasing me, hasn't asked for the gauge back and she's sending me Picasso's of me

Love Eh

I might send her some glasses

 

[rongoodman]

Analog is superior to those simpleminded number gauges, just as script is superior to print.

Do you like phones with rotary dials and coiled cords too?

 

[iain/hsm]

I don't need one. I have a computer. I just kind of want one.
I have no real interest or need to see 300 feet.

So why is it so difficult to find a wrist gauge that gives the majority of the dial to 0-30 feet?

Simply put because there is no real interest in an obsolete design and even less market share available and zero marketing opportunities.
The recreational sports diving industry has moved on products are now items of sports wear made for profit and a big retail mark up margins for the importers and eventually the dive shop.

Many years ago I had the design and manufacture contract to supply the Royal Navy with a suitable depth gauge design and asked Uwatec if they would sell to us the manufacturing rights for the Uwatec mechanical movement as illustrated earlier. We would then re manufacture to Mil spec and non mag as required by the client. The quantity was for 2000 this I didn't disclose to them at the time.

Uwatec said no so I went direct to their movement manufacturer in Switzerland and they were happy to supply. The non mag case was designe/d up and the movement design was adapted for accuracy with a 7 jewelled bearing movement for accuracy. A beryllium copper diaphragm pressure sensor was silver soldered to the case back together with a zero reflex dial, a knife edge pointer and with luminous Luminova dial pointers rather than Tritium.

At the time the Royal Navy design review board decided that having a non magnetic divers depth gauge that could be serviced and calibrated to a high degree of accuracy would require a massive undertaking in getting them back from the various depot locations to base would require too much of a logistic management effort so settled for a cheap throw away plastic (equally non magnetic) divers depth gauge made at the time by a company called MEGA Sports in Italy.
The rest as they say is history A third the price for a working life half as long with no return to base for maintenance with the logistical service return repair considerations solved. What's not to like.

 

[iain/hsm]

Nice to see Ry Cooder is alive and well and living on Straight Street now

 

[iain/hsm]

Moved 2000km, she's still chasing me, hasn't asked for the gauge back and she's sending me Picasso's of me

I might send her some glasses

She sent us the video dude. Josephine wasn't it LOL

Nice to see you still have the shades

 

[agilis]

Do you like phones with rotary dials and coiled cords too?

They have a certain charm, and the sound quality was superior.