Filtration Membrane Discs
Thin, precut membrane rounds for high-throughput, fast filtration of liquid and gas samples. Gridded and non-gridded discs. Various materials including mixed cellulose ester, polycarbonate, PTFE, nylon, and PVDF. For air monitoring/analytical research.
Sizes
Filter membranes are made in a range of diameters, typically designed to fit a specific holder or manifold.
Materials
Filter membrane can be made from cellulose, mixed cellulose esters (MCE), polyvinylidene fluoride (PVDF), polyethersulfone (PES), polyvinyl chloride (PVC), polytetrafluoroethylene (PTFE), nylon, polycarbonate (PC), polyester, polyethylene terephthalate (PET), and polypropylene (PP). Other membrane materials include aluminum oxide, gelatin, porcelain, and glass.
Pore Size
The size of membrane pores determines which particles will be retained by the filter. A pore size of 0.2 µm is small enough to remove microbes from solutions; a 0.45 µm ore size can remove larger particulates.
Color and Grids
White membrane filters may be plain or marked with square grids (outlined in black) that can help with enumerating particles. Gridded or plain black membrane filters may be helpful when filtering light-colored particulates.
Sterility
Filter membranes may be pre-sterilized or may be sterilized using ethylene oxide, gamma irradiation, or autoclaves. The need for sterility is determined by the application, which are many and varied:
- Light microscopy samples
- Cytology sample preparation
- Electron microscopy samples
- Air quality and other environmental monitoring
- Water analysis and water quality testing
- Microbiology colony counting and quality control
- Chemotaxis
- Sterile preparation of buffers, tissue culture media, microbiological media, and other biological fluids
Tisch Scientific Polypropylene Membrane Filters, 0.45um, 25mm, Nonsterile, 200 per pack
Polypropylene Membrane Filters, 0.45um, 25mm, Nonsterile, 200 per pack
Ace Glass, Inc. 0.625" 350 micron polypropylene filter for #25 threaded adapters. Pkg/12.
0.625" 350 micron polypropylene filter for #25 threaded adapters. Pkg/12.
Ace Glass, Inc. 0.625" 210 micron polypropylene filter for #25 threaded adapters. Pkg/12.
0.625" 210 micron polypropylene filter for #25 threaded adapters. Pkg/12.
Ace Glass, Inc. 25mm ID x 30cm chromatography column, 24/40 outer top, 250mL reservoir, without filter disc
25mm I.D. x 30cm chromatography column with 250mL reservoir at top and 2mm bore 1:5 PTFE stopcock plug at bottom. Opening at top is for a 24/40 outer joint.
Foxx Life Sciences EZLabpure™ PTFE Hydrophilic Membrane Filters, 0.45µm Pore Size, 47mm Diameter Filtration Membrane Discs, Non Sterile, 50/PK
EZLabpure™ PTFE Hydrophilic Membrane Filters engineered for superior chemical resistance and dependable filtration performance in demanding laboratory environments. Available in both hydrophobic and hydrophilic configurations, these high-quality PTFE membrane filter discs are ideal for air, gas, solvent, and aqueous applications, delivering consistent flow rates and reliable particle retention. Hydrophobic variants are offered in 0.22 um, 0.45 um, and 1.2 um pore sizes, while hydrophilic options are available in 0.22 um and 0.45 um, with diameter choices including 13 mm, 25 mm, 47 mm, 90 mm, and 142 mm. All filters are supplied non-sterile and comply with USP Class VI Standards for safe use in research and analytical environments.
These Filtration Membrane Disc Filters have a durable wide operating temperature range and resistance to the destructive effects of many chemicals. These filters can be used to filter aqueous fluids without prior wetting.
Sterlitech Corporation PTFE Unlaminated Membrane Filters, 1.0 micron, 90mm, 10/Pk
PTFE Unlaminated Membrane Filters, 1.0 micron, 90mm, 10/Pk
Cole-Parmer Spectra/Mesh 148145 Screen Discs, 47 mm, Nylon, 100 µm, pack of 10
There are four material options to choose from. The nylon mesh filters out particles down to 8 µm. These are ideal for finer macrofiltration needs and are suitable with all aqueous solutions. Polypropylene (PP) mesh offers strength and stability, while also being resistant to most acids, alkalies, and alcohols. These screens are autoclavable. The PEEK mesh holds its shape and features superior chemical resistance. These are ideal for general filtration, are resistant to acidic and alkaline solutions, and feature temperature stability up to 250°C. The 304 Stainless Steel woven discs or sheets are ideal for high differential pressure applications as they are durable and feature extra strength.
Ace Glass, Inc. Replacement glass filter disc for Ace 5801-57 1/4-28 to #15end fitting adapter.
Replacement glass filter disc for Ace 5801-57 1/4-28 to #15end fitting adapter.
Chemglass Life Sciences Fritted Disc, 25mm, Coarse
Fritted Disc, 25mm, Coarse. Porous discs for use in fabrication of special glass apparatus. Fritted glassware is designed for low pressure vacuum filtration or gas flow. The MAX differential pressure should not exceed 15 PSI. Fritted glassware should not be exposed to excessive temperature change or direct exposure to flame due to the fact that it has less resistance to thermal shock than standard borosilicate glassware.
Chemglass Life Sciences Fritted Disc, 10mm, Fine
Fritted Disc, 10mm, Fine. Porous discs for use in fabrication of special glass apparatus. Fritted glassware is designed for low pressure vacuum filtration or gas flow. The MAX differential pressure should not exceed 15 PSI. Fritted glassware should not be exposed to excessive temperature change or direct exposure to flame due to the fact that it has less resistance to thermal shock than standard borosilicate glassware.