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Thanks madnak,
I think I understand what you're saying. But I'm wondering if there could be things beyond all that which you mentioned. Pesumably, the reason we can measure all those things is because we have some clue to their existence through one of our 5 senses. I'm talking about a 6th, or 7th sense that simply escapes us, because not only can't we perceive it through one of our senses, we can't know it even exists.
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Who sensed that electric fields existed?
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http://en.wikipedia.org/wiki/Michael_Faraday
Not directly though. I'm not sure exactly what OP is getting at. Sharks can sense electric fields 'directly'. Bats use echolocation which obviously must be experienced much differently than the way we experience hearing. There are lots of possible and actual senses.
There could be physical phenomenon which is causally isolated from our senses in such a way that we could never discover them through science. Some other creature might be able to sense that phenomenon, but that creature might be undetectable to us as well.