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Laboratory Filter Holders

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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.

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Filter Holder Material

Photograph of components of a glass filtration apparatus including aluminum spring clamp, borosilicate glass base, borosilicate glass funnel, fitted glass support, and borosilicate glass cap.

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

Photograph of a Millicup™-FLEX plastic filter holder, including polypropylene funnel, semi-reusable membrane support collar, and vacuum adapter.

Plastic Filter Holders

Increased durability
Aqueous and organic solutions
Ultracleaning, general filtration, and in-line filtration

Photograph of a stainless steel epifluorescence filter holder including aluminum spring clamp, stainless steel base, and silicone stopper.

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

Photograph of a Millipore® All-Glass Filter Holder Kit including glass funnel, aluminum spring clamp, glass frit support, and ground joint flask.

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.