Question about Micron size??

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Offline mrreno

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Question about Micron size??
« on: 23/02/2008 21:45:05 »
I'm doing a project where I need some filters. I found some reasonably priced ones on the internet but I have no idea how to tell which size is which. I'm looking for the size that filters out the smallest particles. The sizes available are 0.45 microns and 0.2 microns. I know this may seem like a pretty dumb question but which way do these numbers go, it seems to me that the 0.45 micron filter would be the finest one. I'm lost in space on this one & need to get the filters soon. If anyone can help I would appreciate it. THANKS!!!

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Offline Professor Gaarder

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Question about Micron size??
« Reply #1 on: 23/02/2008 23:52:45 »
A micron is also called a micrometer. It defines the gradient of the fibers. What that means in terms of filter sizes is that the finer threads are woven closer together, and can therefore only let extremely tiny particles through. Definitely go for the 0.2.

It's not a stupid question. I had to look it up to answer.

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Offline techmind

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Question about Micron size??
« Reply #2 on: 28/02/2008 23:34:40 »
Just found this table which might help you:
http://www.kason.com/mesh.php
"It has been said that the primary function of schools is to impart enough facts to make children stop asking questions. Some, with whom the schools do not succeed, become scientists." - Schmidt-Nielsen "Memoirs of a curious scientist"

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Offline daveshorts

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Question about Micron size??
« Reply #3 on: 02/03/2008 10:28:16 »
A micron (μm) is a millionth of a metre, or a thousandth of a millimetre (mm), so it is a measurement of size  so a small number of microns will be a small hole.

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Offline Professor Gaarder

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Question about Micron size??
« Reply #4 on: 02/03/2008 15:45:02 »
case in point. go for the 0.2 microns, definitely.