Originally Posted by ernestpworrel
Okay, now what? Is it absolute pressure or not?
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You said you agreed with my statement that said gauge pressure and absolute pressure are different! So you should already know the answer to that question is
no.
Ok, I don't know what you found when you googled, but the first link is to the wiki on the subject. Please read the entire passage describing the difference between gauge and absolute pressure:
http://en.wikipedia.org/wiki/Pressur...zero_reference
[edit] Btw, somehow I forgot about the third type, differential pressure (Danger used the word "differential"). It actually is probably redundant and the other two are subsets, nevertheless the way wiki describes it, gauge pressure usually has the negative sign dropped, whereas differential pressure doesn't. Regardless, it depends on context.
