analog depth gauge oil type?

[FFMDiver]

Can anyone tell me what type of oil I can refill an analog depth gauge with?
Can I just use 3-n-1 from a hardware store or is viscosity critical?
Thank you.

 

[dbg40]

??? No idea, I wonder if it's a mineral oil? That would be clear at least.

 

[Greg Barlow]

Can anyone tell me what type of oil I can refill an analog depth gauge with?
Can I just use 3-n-1 from a hardware store or is viscosity critical?
Thank you.

I believe that most of them are filled with silicone oil.

Greg Barlow

 

[KOMPRESSOR]

Can anyone tell me what type of oil I can refill an analog depth gauge with?
Can I just use 3-n-1 from a hardware store or is viscosity critical?
Thank you.

Why would you bother doing that? I would have a hard time to trust it if it's been emtied of oil and then refilled. Besides, a new one doesn't cost much, and if you find it used somewhere I'm sure the owner would give it away for nothing. Who use them anymore in these computer times?

 

[FFMDiver]

Why would you bother doing that? I would have a hard time to trust it if it's been emtied of oil and then refilled. Besides, a new one doesn't cost much, and if you find it used somewhere I'm sure the owner would give it away for nothing. Who use them anymore in these computer times?

I know, good point. I purchased an old Dacor w/ a bubble in it. They unscrew quite easily and there isant much too them. Its a backup.

 

[JimJam]

I would agree with KOMPRESSOR, but just for the sake of debate, there is a good chance the the "oil" in the gauge is not oil at all, but glycerin. I work for a company that uses an awful lot of gauges and the filled ones tend to use glycerin because of the viscosity.

 

[oly5050user]

mineral oil