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
Foxx Life Sciences EZLabpure™ Polypropylene PP Hydrophilic Membrane Filters, 0.22µm Pore Size, 13mm Diameter Membrane Filter Discs, Non Sterile, 100/PK
EZLabpure™ Polypropylene PP Hydrophilic Membrane Filters are designed for efficient particle retention, sample clarification, and routine laboratory filtration applications. Featuring high-quality PP hydrophilic membranes, these membrane filter discs provide strong chemical compatibility and reliable flow performance for aqueous solutions. Available in 0.22 um and 0.45 um pore sizes, and offered in 13 mm, 25 mm, 47 mm, and 90 mm diameters. All membrane filter discs are supplied non-sterile and comply with USP Class VI Standards for safe use in research and analytical environments.
These Filtration Disc Membranes are a preferred choice for HPLC applications. This plastic polymer has good resistance to a broad range of chemicals even at high temperatures, making it adaptable for applications ranging from air filtration. They are suitable for aqueous and organic solvent filtration, depth filtration, sterilizing gases, and trapping aqueous aerosols, and air and gas venting.
Foxx Life Sciences EZLabpure™ Cellulose Nitrate CN Hydrophilic Membrane Filters, 0.22µm, 25mm Diameter Membrane Filter Discs, Non Sterile, 50/PK
EZLabpure™ Cellulose Nitrate CN Hydrophilic Membrane Filters designed for efficient particle retention, sample clarification, and microbiological applications. Featuring high-quality cellulose nitrate membranes, these membrane filter discs deliver consistent flow rates and reliable performance for laboratory filtration. Available in 0.22 um, 0.45 um, 0.8 um pore sizes, and offered in 25 mm, 47 mm, 90 mm, 142 mm, and 293 mm diameters. All membrane filter discs are supplied non-sterile and comply with USP Class VI Standards.
These Filtration Disc Membranes are used for applications involving aqueous solutions. Featuring narrow pore size distribution, these filters ensure improved surface capture and analysis with low levels of extractables, making them a reliable choice for particle counting in liquids and aerosols. These support a wide range of laboratory filtration, microbiological testing, and general sample preparation applications
Foxx Life Sciences EZLabpure™ Nylon Hydrophilic Membrane Filters, 0.8µm Pore Size, 293mm Diameter Filtration Membrane Discs, Non Sterile, 25/PK
EZLabpure™ Nylon Hydrophilic Membrane Filters are engineered for reliable particle retention, sample clarification, and broad chemical compatibility in laboratory applications. These Nylon membrane filter discs provide excellent mechanical strength, consistent flow rates, and dependable performance for aqueous and organic solutions. Available in 0.22 um, 0.45 um, 0.8 um, and 1.2 um pore sizes, and offered in 13 mm, 25 mm, 47 mm, 90 mm, 142 mm, and 293 mm diameters, all variants are supplied non-sterile. All components comply with USP Class VI Standards, ensuring material safety and consistent filtration quality.
The filtration membrane discs are recommended for particle removing filtration for water, aqueous solutions and solvents for analytical determinations such as HPLC, and filtration of these liquids. These filters are hydrophilic and suitable for HPLC sample preparations, sterile filtration of aqueous and solvent solutions, and clarification and particle removal.
Alkali Scientific Polyethersulfone (PES) Membrane disk diam.47 mm, PES 0.45, 100/Pk
Polyethersulfone (PES) membrane filter discs, 47 mm diameter, with 0.45 µm pore , designed for reliable filtration in microbiology, environmental, and laboratory applications. PES membranes provide high flow rates, low protein binding, and excellent chemical compatibility with aqueous solutions. The uniform pore structure ensures consistent retention and dependable filtration performance for routine sample preparation and analytical procedures. Suitable for use with standard 47 mm filter holders and vacuum filtration systems. Ideal for sterile filtration, water testing, and general laboratory filtration tasks where dependable performance and reproducibility are required. Supplied in a convenient pack of 100 membranes for laboratory use.
Alkali Scientific CellPro™ PES (Polyethersulfone) Membrane Filter, 100/Pk, 13 mm, 0.45 μm
CellPro™ Polyethersulfone (PES) membrane filters are hydrophilic, high performance laboratory filters designed for fast flow rates, low extractables, and minimal protein binding. They are ideal for sterile filtration, clarification of biological fluids, cell culture media preparation, and pharmaceutical or analytical sample processing. PES membranes are preferred when high throughput and low sample loss are critical, especially with protein rich or sensitive biological solutions. The membrane offers broad chemical compatibility with aqueous solutions, alcohols, and dilute acids or bases. Hydrophilic construction eliminates the need for pre wetting, allowing immediate use with water based samples while maintaining consistent filtration performance and reliable particle retention in laboratory workflows.
Hach Company Membrane, Venting PTFE PK/18
Replacement venting membrane for use with the Cold Vapor Mercury Test. PTFE 0.45µm pore size. 50mm Diameter hose barb fittings. Autoclavable. 18/pk
Alkali Scientific CellPro™ MCE (Mixed Cellulose Ester) Membrane Filter, 100/Pk, 25 mm, 0.22 μm
CellPro™ MCE (Mixed Cellulose Ester) Membrane Filters are high performance filtration membranes commonly used in laboratory and industrial applications for microbiological analysis, particle monitoring, and air/water testing. These filters are composed of a blend of cellulose acetate and cellulose nitrate, combining the strengths of both materials for reliable and consistent performance. Key Features: High Porosity (up to 80–85%): Ensures fast flow rates and high throughput. Uniform Pore Structure: Provides accurate and consistent retention of microorganisms and particles. Hydrophilic Nature: Eliminates the need for pre wetting with surfactants; ideal for aqueous solutions. Low Extractables: Minimizes contamination risks in sensitive analyses. Smooth, White Surface (or Gridded Options): Makes it easy to visually inspect and count colonies during microbiological testing.
Hach Company ETFE Membranes for Electrochemical Sensors, 25 μm, 35 mm, Box of 25 (Hach 2952A)
Hach 2952A ETFE membranes are thin, chemically resistant membranes supplied in a box of 25 for use with electrochemical sensors. Each membrane is 25 μm thick and 35 mm in diameter, designed to protect sensor electrodes while allowing target gases and ions to pass through. These membranes are intended for routine replacement during sensor maintenance and recharging.
- Material: ETFE
- Thickness: 25 μm
- Diameter: 35 mm
- Quantity: box of 25 membranes
- Intended use: replacement membrane for electrochemical sensors
- Typical application: maintenance and recharging of oxygen and other electrochemical sensors
Alkali Scientific CellPro™ MCE Membrane Filter with Grid, 47mm, 100/Pk, 0.45 μm
CellPro™ MCE Membrane Filter with Grid, 47mm, 100/Pk, 0.45 μm. Designed for filtration applications, this 47mm membrane filter with 0.45μm pore size ensures precise separation of particulate matter. Used in microbiological and environmental analyses, providing reliable and high-quality filtration.
Sterlitech Corporation Polyester (PETE) Membrane Filters, Transparent, 0.4 micron, 12 Micron Thickness, 2E6 pores/cm2, 25mm, 100/pack
Polyester (PETE) Membrane Filters, Transparent, 0.4 micron, 12 Micron Thickness, 2E6 pores/cm2, 25mm, 100/pack
Biodesign Inc of Ny CellMicroSieves Sampler Pack (1 each 200, 100, 50, 25, 8 micron pore sheet at 12 by 12 inches)
CellMicroSieves (TM) filters manufactured by BioDesign Inc of New York allow the separation of multiple cell types using a filter that will not bind cells or proteins. Eleven pore sizes are available in sheets (3 sheets of 12 by 12 inches per package), rolls (2 feet by 3 feet), and 47mm circles (10 per package) that are extremely useful for specific cell type separation, stem cell isolation, hybridoma production, collection of cells from media, and many other uses where a strong non-binding specific sized pore filter is needed. Can be repeatedly steam sterilized retaining its pore size. A pure nylon thread product with no extractable materials that is specifially made for biologial research.
Foxx Life Sciences EZLabpure™ Mixed CE(Cellulose Ester) Hydrophilic Membrane Filters, 0.45µm, 90mm Diameter Filtration Membrane Discs, Non Sterile, 25/PK
EZLabpure™ Mixed Cellulose Ester (MCE) Hydrophilic Membrane Filters are biologically inert and one of the most widely used membranes in research applications. With a smoother, more uniform surface than pure nitrocellulose filters, these membrane filter discs deliver superior flow rates and can withstand autoclaving up to 130°C without adversely affecting bubble point, flow rate, or microbiological recovery. Widely used for sterilizing biological fluids, microbiological testing, and analytical applications, these non-sterile membrane filter disc are available in 0.22 um, 0.45 um, and 0.8 um pore sizes across 13 mm, 25 mm, 47 mm, and 90 mm diameters with packaging options of 25/PK, 50/PK, and 100/PK. These Filtration Disc Membranes are biologically inert and one of the most widely used membranes in research applications