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
MilliporeSigma EMD Millipore Capsule Filter, Durapore PVDF, 0.22 μm, 4 in. Length
The EMD Millipore Opticap XL Capsule is a Durapore 0.22 μm filter with hydrophilic PVDF media, designed for sterile filtration in bioprocessing applications. It is non-sterile and gamma compatible.
- Constructed from PVDF membrane, polyester/polyethylene support, and gamma-stable polypropylene housing.
- Meets FDA indirect food additive requirements (21 CFR 177-182).
- 0.22 μm pore size for effective microorganism retention.
- Low bacterial endotoxin levels (≤0.5 EU/mL).
- Bubble point ≥3450 mbar (50 psig) at 23 °C.
- Nominal length: 4 in. (10 cm); filtration area: 0.18 m2.
- Max operating pressure: 80 psi at 25 °C.
- Sterilization compatible via autoclaving or 45 kilogray gamma exposure.
Sterlitech Corporation Polycarbonate (PCTE) Membrane Filters, PVP-Free, 1.0 Micron, 25mm, 100/Pk
Polycarbonate (PCTE) Membrane Filters, PVP-Free, 1.0 Micron, 25mm, 100/PkPrecisely controlled cylindrical pores for maximum absolute particulate captureTransparent, smooth flat surface for microscopic workLowest, non-specific binding membraneNarrow pore size distributionNo sloughing or particle shedding, one integral plastic filmNegligible adsorption or absorptionLow extractables
Sterlitech Corporation Nylon Membrane Filters, 0.2 Micron, 142mm, 25/Pk
Nylon membrane disc filters: 0.2 µm pore-size, 142 mm diameter, pack of 25. Hydrophilic, low-extractable, inert, durable material supported by an internal polyester web. Typically used for HPLC, microbiology, medical/clinical, and general filtration.
Foxx Life Sciences EZBio Rigid Reservoir for Tangential Flow Filtration (TFF) System, PP, 115L Rectangular Welded Carboy, 120mm, VersaCap with Rigid tubing 3x Maxi TC on 3/8"ID x 1/2"OD Tubing & 1x 3/8"HB with Bottom Drain Mini TC, Non-Sterile, 1/CS
The EZBio SUT Rigid Reservoir System is a single-use rigid bioprocess carboy and bottle solution for fluid handling, supporting upstream and downstream processes. It provides a sterile, closed, scalable platform with integrated rigid tubing for secure, kink-free transfer of buffers, media, process fluids.
Available in 1L–115L volumes (PP bottles/carboys), it features VersaCap technology with customizable 2–5 ports (Mini/Maxi TC options) & bottom Tri-Clamp port for efficient drainage. Plug-and-play integration simplifies setup, reduces contamination risk, and speeds workflows.
Features
Made from USP Class VI materials, gamma-sterilizable, autoclavable (15 PSI, 20 min at 121°C)
Rigid dip tube with notch to allow for easy filling and extraction of media
Bottom TC for quick media harvest
Laser marked ports for quick identification
Multi-port cap system
Applications
Bioprocess storage, aseptic transfer
Cell Harvest
Closed collection system
Sterlitech Corporation Aluminum Oxide Membrane Filters, 0.1 Micron, 47mm, 10/pk
Aluminum oxide membranes feature uniform, densely-packed honeycomb pore structures that contribute to precise retention and high porosity characteristics.Applications:* HPLC sample and mobile phase filtration* Filtration of aggressive organic solvents* Virus concentration and analysis* Analysis of micro plastic in water* Epifluorescence microscopy* Synthesis of nanostructures (e.g. nanotubes)Features:* Fast filtration, efficient separation and high purity* High number of tightly controlled pores in honeycomb shape* Free of organic extractables and leachables* Minimum adsorption* Transparent when wet
Sterlitech Corporation Polycarbonate (PCTG) Gold-Coated Membrane Filters, 0.8 Micron, 40/20nm Coating, 13mm, 10/Pk
Polycarbonate (PCTG) Gold-Coated Membrane Filters, 0.8 Micron, 40/20nm Coating, 13mm, 10/Pk
Foxx Life Sciences EZLabpure™ PTFE Hydrophobic Membrane Filters, 0.22µm Pore Size, 142mm Diameter Membrane Filter Discs, Non Sterile, 25/PK
EZLabpure™ PTFE Hydrophobic Membrane Filters are engineered for superior chemical resistance and reliable filtration in laboratory. Available in hydrophobic & hydrophilic configurations, these PTFE membrane filter discs offer consistent flow rates & effective particle retention. Hydrophobic variants are available in 0.22 um, 0.45 um, and 1.2 um pore sizes, while hydrophilic are offered in 0.22 um and 0.45 um, with diameter options 13 mm, 25 mm, 47 mm, 90 mm and 142 mm. All filters are non-sterile and comply with USP Class VI Standards.
These Filtration Membrane Disc Filters are composed of pure PTFE membrane bonded to a polypropylene support, ensuring broad chemical compatibility (pH 1–14) for filtration of solvents, acids, and aggressive chemicals. Due to their hydrophobic nature, pre-wetting with solvents such as ethanol or methanol is required before filtering aqueous solutions.
Alkali Scientific CellPro™ MCE (Mixed Cellulose Ester) Membrane Filter, 100/Pk, 47 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.
Alkali Scientific CellPro™ NY Nylon Membrane Filter, 100/Pk, 13 mm, 0.45 μm
CellPro™ NY (Nylon) Membrane Filters are durable, hydrophilic membranes made from high quality nylon polymer, designed for general purpose filtration of aqueous solutions and many organic solvents. These membranes provide excellent mechanical strength, high flow rates, and broad chemical compatibility, making them suitable for sample preparation, sterilization, microbiology, and analytical applications. Nylon membranes exhibit low extractables and reliable binding characteristics for nucleic acids and proteins, supporting use in biochemical and environmental testing workflows. Because of their hydrophilic structure, they require no pre wetting and allow fast, efficient filtration of both acidic and alkaline solutions. Available in multiple pore s and diameters, these filters are supplied in convenient packs of 100, ready for routine laboratory and research use.
Alkali Scientific CellPro™ NY Nylon Membrane Filter, 100/Pk, 47 mm, 0.45 μm
CellPro™ NY (Nylon) Membrane Filters are durable, hydrophilic membranes made from high quality nylon polymer, designed for general purpose filtration of aqueous solutions and many organic solvents. These membranes provide excellent mechanical strength, high flow rates, and broad chemical compatibility, making them suitable for sample preparation, sterilization, microbiology, and analytical applications. Nylon membranes exhibit low extractables and reliable binding characteristics for nucleic acids and proteins, supporting use in biochemical and environmental testing workflows. Because of their hydrophilic structure, they require no pre wetting and allow fast, efficient filtration of both acidic and alkaline solutions. Available in multiple pore s and diameters, these filters are supplied in convenient packs of 100, ready for routine laboratory and research use.
Foxx Life Sciences EZLabpure™ PTFE Hydrophobic Membrane Filters, 0.22µm Pore Size, 25mm Diameter Filtration Membrane Discs, Non Sterile, 50/PK
EZLabpure™ PTFE Hydrophobic Membrane Filters are engineered for superior chemical resistance and reliable filtration in laboratory. Available in hydrophobic & hydrophilic configurations, these PTFE membrane filter discs offer consistent flow rates & effective particle retention. Hydrophobic variants are available in 0.22 um, 0.45 um, and 1.2 um pore sizes, while hydrophilic are offered in 0.22 um and 0.45 um, with diameter options 13 mm, 25 mm, 47 mm, 90 mm and 142 mm. All filters are non-sterile and comply with USP Class VI Standards.
These Filtration Membrane Disc Filters are composed of pure PTFE membrane bonded to a polypropylene support, ensuring broad chemical compatibility (pH 1–14) for filtration of solvents, acids, and aggressive chemicals. Due to their hydrophobic nature, pre-wetting with solvents such as ethanol or methanol is required before filtering aqueous solutions.
Sigma Aldrich Fine Chemicals Biosciences Nylon filter membranes por
Nylon filters are naturally hydrophilic and no wetting agents are used in manufacture.With an extractable level 0.0015Amg/cm2 they are ideal for HPLC solvent and sample preparation. Because of high non-specific binding they are not recommended for protein SOLUTIONons.Compatible with aqueous and most organic solventsAutoclavable unaffected by temperatures up to 180C