Laboratory Filter Holders
Filter housings are used in conjunction with cut disc membrane filters providing structural support and creating a seal around the membrane to prevent filtrate contamination. Reusable syringe filter holders are suited for filtering or clearing small amounts of liquid where a replaceable or removable filter is desired. Filter holders for vacuum and pressure filtration are available in a variety of formats and sizes to accommodate a range of filter diameters. Filter holder selection is dependent on the following criteria.
Section Overview
Glass Filter Holders
- Broad chemical resistance
- Chemically inert
- Aqueous and organic solutions
- Corrosive liquids
- HPLC solvent preparation
- Research and small-scale filtration
- Design may include the addition of an alignment guide, enabling quick assembly and protecting glassware from damage
Plastic Filter Holders
- Increased durability
- Aqueous and organic solutions
- Ultracleaning, general filtration, and in-line filtration
Stainless Steel Filter Holders
- High strength
- Resistant to corrosion
- Resistant to bacteria
- Industrial applications requiring pressure or high-pressure filtration
- Small-scale filtrations of organic or corrosive solutions
- Bacterial contamination-sensitive applications
Filtration Systems and Kits
- Kits include filter funnels, clamps, and other accessories to assemble a complete filtration apparatus
- Available in glass, plastic, and stainless steel
- General filtration
- Bottle-to-bottle filtration
- Microanalysis
- Retentate analysis
Filter diameter
The filter holder diameter must match the diameter of the membrane filter. To minimize sample loss and reduce the risk of membrane fouling, sample volume should be considered when selecting a filter diameter. We offer filter holders with 13 mm, 25 mm, 47 mm, 90 mm, and 142 mm diameters.
- 13 mm: recommended for 1 mL - 15 mL volumes
- 25 mm: recommended for 10 mL - 50 mL volumes
- 47 mm: recommended for 100 mL - 500 mL volumes
- 90 mm: recommended for 200 mL - 1,000 mL volumes
- 142 mm: recommended for larger volumes
Pressure-driven filtration or vacuum-driven filtration
Filter holders can withstand specific maximum pressures and have appropriate connections for use with either pressure systems or vacuum systems. Glass filter holders are designed for vacuum filtration. Stainless steel and plastic filter holders are designed for either vacuum or pressure filtration.
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