If all you need is a preweighed filter, the ProWeigh would be your best option. A representative sample of these filters are double checked for proper weights instead of every filter as with DoubleWeigh. The volatile filters are only for use if the filter and the material on it are to be burned to remove volatile components. All of these filters have a pore size of 1.5 microns.

All of the filters that are recommended by name in the footnote for Standard Methods 2540C have a listed pore size of 1.5 um. The size is slightly smaller than the maximum called for because every type of filter will allow some particles of a larger size to pass through. 1.5 um is a good size to get as close as possible without allowing too many large particles to pass through.

Yes--this is possible. Customers have been successful in separating the two into different fields on an Excel spreadsheet or in their LIMS system.

Yes--the bar code contains both the filter weight and the pan ID #.