Sorry guys, I didn't say anything about the mechanical type as I was addressing questions about the electrical questions. I think you have a good understanding of the Bourdon type.
SIDEBAR: Just to clear up the question of what predates what. The Bourdon tube was patented in France in 1849. The Chinese were using rockets in the 13th century, so someone had to understand rocket science even back then. Please don't get upset, just having some fun and good luck with your gauges.
