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
Microsolv Technology Corporation Filter Memb .45 Nylon 47Mm 100
Filters, Membrane, 47mm, 0.45um, Nylon. Round, AQ Brand. 100/PK.
Ace Glass, Inc. 2.95" 210 micron polypropylene filter for #80 threaded adapters. Pkg/6.
2.95" 210 micron polypropylene filter for #80 threaded adapters. Pkg/6.
Ace Glass, Inc. 0.510" 210 micron polypropylene filter for #15 threaded adapters. Pkg/12.
0.510" 210 micron polypropylene filter for #15 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.
IW Tremont Co Inc LabExact Hydrophobic PTFE membrane, NON-STERILE, 0.45 micron, 47mm diameter, pack of 100
LabExact Polytetrafluoroethylene (PTFE) Membrane is supported with a polypropylene (PP) scrim for easier handling. This scrim is bonded using a unique technique utilizing no bonding agent for purity, chemical compatibility and lower extractables. Hydrophobic material is effective in separating polar/nonpolar solvents. Aqueous solutions can pass after prewetting with methanol
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.
Grainger Membrane Filter 47 mm 0.45 um PK200
The LabExact Membrane Filter is a 47mm diameter hydrophilic polyethersulfone membrane filter with 0.45μm pore size. It has low protein binding and is ideal for analytical sample preparation including HPLC. The polyethersulfone membrane is compatible with most solvents. These sterile filters have a high flow rate and loading capacity. They can be used for aqueous and organic solutions. The maximum operating temperature is 70°C at 35 psi. Each filter has a 47mm diameter. Boxes contain 100 filters individually sealed in peel-open pouches.
Alkali Scientific FLT, DSK, N66 5.0um Pore , 47mm Diameter, 100/pk
Disk filters made from high quality Nylon 66 membrane with a 5.0 µm pore and 47 mm diameter, designed for reliable particle retention and efficient filtration in laboratory workflows. These membrane filters provide excellent chemical compatibility, strong mechanical stability, and consistent flow rates, making them suitable for aqueous solutions, solvents, and general laboratory sample preparation. The uniform pore structure ensures dependable filtration performance and reproducible results in analytical, research, and quality control applications. Ideal for use in microbiology, environmental testing, and routine lab filtration procedures. Supplied as 100 filters per pack, these membranes support convenient handling and dependable filtration performance in professional laboratory environments.
Alkali Scientific CellPro™ PES (Polyethersulfone) Membrane Filter, 100/Pk, 90 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.
Alkali Scientific CellPro™ MCE (Mixed Cellulose Ester) Membrane Filter, 100/Pk, 13 mm, 0.45 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.
Azzota Corp MPF CN-CA 50mm 0.22u 100pk
Microporous Filter CN-CA Diameter 50mm Pore Size 0 22um 100/pk
