Filters
Filters are essential in research laboratories and many other industries for removing particulates and creating environments conducive to a wide array of experiments and procedures. The devices come in different forms including in-line filters, paper discs, small capsules, and large ventilation panels. Filters also purify and concentrate the liquids and gases required for testing. For air, this means removing pollution, moisture, and solid airborne particulates; for liquids, this means removing impurities and small contaminants.
Syringe filters, Minisart® PES
Supplier: Sartorius
Minisart® PES with polyethersulfone (PES) is optimal for highest flow rates and a pH of 2 - 13. Type 1776D with a pore size of 0,22 µm can be used for sterile filtration and has a male Luer slip outlet. Version ACK is individually packed and sterilised by ethylene oxide (EO).
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Qualitative filter papers, grade 201, Whatman™
Supplier: Whatman products (Cytiva)
A general qualitative filter for less critical routine analysis. Widely used in industrial laboratories and students laboratories for routine filtration.
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Qualitative filter papers, standard grades, grade 591, Whatman™
Supplier: Whatman products (Cytiva)
These cellulose filters are used in qualitative analytical techniques to determine and identify materials.
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Qualitative filter papers, technical, smooth, grade 3 m/N
Supplier: Sartorius
These smooth filter papers are made of refined pulp and linters with more than 95% alpha-cellulose content. The ash content of these filter papers is between 0,1 and 0,15%. They are used for routine analyses like clarification, determination of substances, but also as discs with a centre hole for technical applications. Grades with a wet burst resistance >30 kPa are referred to as wet-strengthened and are therefore suitable for pressure or vacuum filtration.
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Grade 8 ruled filter papers, Whatman™
Supplier: Whatman products (Cytiva)
These white cotton linter cellulose filters are ideal for routine investigations of foreign substances in a variety of sample types.
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Membrane filters, cellulose nitrate
Supplier: Sartorius
These cellulose nitrate membranes are suitable for air monitoring.
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Qualitative filter papers, wet strengthened grades, grade 1574 and 1574 ½, Whatman™
Supplier: Whatman products (Cytiva)
Medium fast cellulose filter paper with high wet strength. This paper has the same chemical resistance characteristics as Grade 1573.
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Gas distributors and frits for scrubber bottles and columns, BOLA
Supplier: Bohlender
These PTFE gas distributors and frits are suitable for steady sparkling of the flowing gas.
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Quality monitors, 37 mm
Supplier: Cytiva (Formerly Pall Lab)
Compact and disposable filtration units for analysis of process fluids.
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Grade 2589 D filter papers for technical use, Whatman™
Supplier: Whatman products (Cytiva)
A very thick filter with high wet strength. Offers medium to slow flow rate and retains very fine precipitates.
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Application specific filter papers, grade 287 ½, Whatman™
Supplier: Whatman products (Cytiva)
Kieselguhr paper with a medium to slow flow rate. Additional adsorption effect, e.g., for the separation of very fine semi-colloidal turbidity, for clarifying milk serum, starch solutions, soil suspensions or sugar-containing solutions prior to polarimetry or refractometry.
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Ultipor® GF Plus Filter Cartridge
Supplier: Cytiva (Formerly Pall Lab)
Pall Ultipor® GF Plus filter cartridges are made with high voidage glass fiber media for enhanced filter life. The cartridges feature a high area pleated element construction designed to fit in sanitary-style filter housings.
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Membrane filters, type 131
Supplier: Sartorius
Non sterile membrane filters for colony counting, particle testing, microscopy and sterility testing. The membrane filters are made of cellulose nitrate (cellulose ester).
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Pleated capsules with Versapor® membrane
Supplier: Cytiva (Formerly Pall Lab)
These disposable capsules offer easy microfiltration for laboratories and small-volume processors.The pleated capsules combine the efficiency of a membrane disc filter with the large filtration capacity of a pleated surface.
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Masterflex® Strainer Mesh for Low-Cost In-Line Strainer Systems, Avantor®
Supplier: Avantor Fluid Handling
Easily customize strainer system to suit your application.
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Masterflex® Strainer Bottoms for Low-Cost In-Line Strainer Systems, Avantor®
Supplier: Avantor Fluid Handling
Easily customize strainer system to suit your application.



