Depth Gauge Oil

[dead dog]

What kind of oil is used in a depth gauge, like US Divers and SOS depth gauges from the 50's and 60's?

 

[Couv]

I've used mineral oil and the procedure for filling was similar to the one in the link below except I submerged the gauge while filling.
Compass bubble repair

 

[JamesBon92007]

I just used some lamp oil to refill a depth gauge and compass but haven't taken them diving yet. I also have a bourdon tube depth gauge that was directly exposed to the sea water and always got clogged so I'm putting it in a housing with lamp oil. I submerged it in the oil overnight and it didn't seem to hurt the luminous paint on the dial.

I need to build a pressure tank.

 

[antigaujohn]

The most common oil used in gauges is glycerin, it stays clear and you can buy it at any local pharmacy.

Scientia Non Domus,
(Knowledge has No Home)

antiguajohn

 

[lucca brassi]

or silicone oil or parafine oil

 

[abnfrog]

yes the pharmacy has oil ive used 20 -30 times