How is Durapore membrane different than Millipore Express SHF?
» Answer
Durapore membrane is made from a different polymer (polyvinylidene fluoride (PVDF) versus the polyethersulfone membrane of Millipore Express SHF) and has a different pore structure. These give Millipore SHF a flow advantage.
How do I integrity test this filter?
» Answer
For diffusion testing, cartridge integrity can be measured either: 1) .visually with a downstream mass flow monitor, or 2). with an inverted graduated cylinder, or 3). using an automated integrity tester. For bubble point testing, an enhanced bubble point test (diffusion test followed by a bubble point test) using an automated integrity tester is recommended.