mrreno Posted February 23, 2008 Share Posted February 23, 2008 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!!! Link to comment Share on other sites More sharing options...
Mr Skeptic Posted February 23, 2008 Share Posted February 23, 2008 0.45 microns is a larger size than 0.2 microns. Link to comment Share on other sites More sharing options...
insane_alien Posted February 23, 2008 Share Posted February 23, 2008 0.2 micron filter will be the finest one. this is a measurement of the space between the mesh fibres. the smaller this size the finer the filter. Link to comment Share on other sites More sharing options...
mrreno Posted February 23, 2008 Author Share Posted February 23, 2008 Thanks alot!! I was thinking that 0.2 microns meant 2 tenths & 0.45 meant 45 hundrenths, figuring that 0.45 was smaller. That's where I was getting messed up. I still don't seem to get it but at least I know which one to get!! Thanks again!! Link to comment Share on other sites More sharing options...
swansont Posted February 24, 2008 Share Posted February 24, 2008 2 tenths is 20 hundredths, which is smaller than 45 hundredths Link to comment Share on other sites More sharing options...
mrreno Posted February 24, 2008 Author Share Posted February 24, 2008 I was terrible in math when I was in school and that was 34 years ago. As you can see I haven't gotten any better at it. Link to comment Share on other sites More sharing options...
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