Buy a Magnehelic Gauge, or build your own?
Well, I went with the later option.
Magnehelic, what's up with that??
For years I've used the 'old school' method of pressure testing a clarinet joint. Cover holes with fingers, with mouth on the top of the joint, blow (pressure) or suck (vacuum) test. You get the feel after a while, can determine a lot...
After seeing and then trying a Magnehelic gauge, I was intrigued with the possibility of increased accuracy (a number assigned to a given pressure!) and the idea (during flu season!) of not putting the clarinet in my mouth.
After a bit of study and some purchasing, there is now a Magnehelic at the workshop. It's handy!

A bunch of disparate parts. Some from eBay, a few were left over from old projects, like from High School times.

I wanted the faceplate to be tidy, things nicely lined up, etc. so I did all the drilling on the milling machine.

Plans are good!

And look, the big 4" hole missed that screw!

Dusty work.

Faceplate, populated.

Plumbing installed.

Fairly simple really.

Meet the Magnehelic.

to inquire about an instrument, write to me via e-mail or post

Granlund  Woodwind  Repair
8612  Wabash Avenue  South
Seattle, Washington  98118-4749
206-448-9627

prices subject to change