What kind of oil in pressure gauges?

[Tampa_Diver]

Just wondering if anyone knows what kind of oil is in a pressure guage? Also do depth guages have any? Thanks

 

[bvmjethead]

I would GUESS, the cheapest oil the mfg could get at the time of mfg.

 

[Thalassamania]

Usually mineral oil I think.

 

[bureau13]

I just noticed after my last dive that whatever was in my pressure gauge before appears to have leaked out. The gauge still seems to work, but...that's weird.

jds

 

[redacted]

I'm pretty sure none of my SPGs are oil filled - just air. The stuff leaking out of one of my dead depth gauges looks, smells, and feels like mineral oil.

 

[Thalassamania]

SPGs are NOT oil filled, many other pressure gauges and depth gauges (which are pressure gauges calibrated in FSW rather than PSI) are.

 

[2bigtanks]

most oil filled guages are filled with glycerin. It is typically used to help reduce the bounce in the needle in certain applications.

 

[Fluggs]

My old aladin pro was filled with mineral oil, made a damn big mess when I opened it after it died (sometime you just HAVE to know what's inside)

 

[EricQ]

Fluggs, how did you open your Aladin?

 

[Fluggs]

Sorry double post