Originally Posted by
pdlamb
I'm not aware of a pencil gauge that'll read up to 100 psi and work on Presta rims. The Zefal dial gauge [MENTION=197614]fietsbob[/MENTION] referenced works well, though.
For that matter, so does my thumb.

I have a Kingsbridge gauge that fits only presta and goes well above 100 psi. But it's out of production.
A vintage standalone presta valve pressure gauge