Choosing filters
How to compare diameter, membrane, pore size, and pack size on the filters currently in the shop.
What hydrophobic and hydrophilic mean on a listing
Two PTFE listings use these words so the groups can be told apart. The words are not a test report, and they do not say the filter suits a named sample.
13 mm, 25 mm, and 33 mm
Diameter is the width of the filter disc. In this shop the numbers that appear are 13 mm, 25 mm, and 33 mm. 25 mm is not 0.25 µm.
Pore size, written the way the shop writes it
0.22, 0.45, 0.8, 1.2, and 2.0 µm are the pore sizes in the current catalog. The number is not the diameter, and a finer pore is not a recommendation.
The membrane names on the packs
Nylon, PES, PTFE, MCE, PVDF, and BT are the membrane names printed on current listings. Here is what those letters stand for, and the claim this page will not add.
How to read a syringe filter title
Diameter, membrane, pore size, and pack size are the four lines a title in this shop is trying to answer. This note is how to compare them, and what it will not claim.