Thank you David. Interesting to note what the "guts" may consist of.
I'd forgotten, but there is a bleed hose on this fuel pressure gauge
so it's obviously intended to come into contact with fluids.

I will report back.

On 5/21/17, David Beierl <dbeierl@attglobal.net> wrote:
> A gauge for coolant pressure should have full scale reading of at least
> 20-25 psi since you're expecting readings up to 15 psi or so.  Ideally it
> should also not be pinned at zero, but able to register negative pressures
> of a psi or two.
>
> If you don't want coolant to be forced into the gauge, use a length of hose
> between cooling system and gauge, and keep the gauge and hose above system
> level.
>
> Most Bourdon tube-type gauge mechanisms are soldered brass and wouldn't be
> bothered by coolant.  For digital gauges with silicon sensors, I suspect
> that resistance to liquids might vary widely but I have no actual
> knowledge.
>
> Yrs,
> d
>

--
Neil n

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