Beer bottle psi gauge?

How much do small PSI gauges cost and a fitting which could be sealed into a plastic beer bottle cap?

Call me a geek, but I'd love to see what PSI bottles get to during carbonation.

 

Call me a geek, too. (answer: about $15).

http://www.homebrewtalk.com/f51/pressure-gauge-mounted-bottle-cap-268151/

 

Save some money?
http://www.homebrewtalk.com/f32/bottle-carbing-idea-final-data-review-205862/

 

You sir, are a geek, and a magnificent [email protected]##[email protected] It looks like its at 4 psi - did it stay there the whole time?

 

You'll have to check that thread. The pressure moved around a bit with different temps, but I honestly can't remember all the details. Need to do some more experiments.

I'm a little geeky, true ( I copied the idea from another thread here, so it wasn't my idea ). I'm concerned what "[email protected]##[email protected]" is. Anyhoo, I think you'll like my microscope adventures too then!