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Originally Posted by TerraMex
actually i've seen it, in the Portuguese Institute of Quality (they "supply" the standard cal).
I got the tour. Anyway, it's done in several tubes (3 if i recall, per container) in a aluminium pressure chamber. If that's "hobbyist" friendly, then hell, i really have to move to the US. 
http://www.iop.org/EJ/S/0/M32185/pTF...2/9/me7209.pdf
Hmm. Brians : this? Sounds simple. But these things never are.
PS: had my laughts when they used a king size enviormental chamber to test a small pressure device for tyres. The thing is as big as a living room, yet the device is the size of a bread box. |
This article is much more hobby friendly, TM, and could cost less than $150 (article says $100, but inflation happens).
As for the size of the env chamber... real accuracy is expensive and space consuming.
Edit: btw, ordered a CD from amazon of those Amateur Scientists projects. Will see how good it is.