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Membrane Filters

Membrane Filters

Tisch Scientific is your source for membrane filters and other micro-filtration devices. Our highest quality facility assures consistent quality across our wide variety of membrane filters. We offer competitive prices without compromising quality.

Whether you are performing simple bottle top filtration or operating a complex vacuum manifold system our expert staff is ready to help you with your membrane filter selections. Why not take advantage of over 30 years of experience in the business.

Beyond the expert advice we also offer a sample program and we’ll ship it to you right away.

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Buy Membrane Filters here but first be informed. The Membrane Filter Technique (MF Technique) offers the advantage of isolating discrete colonies of bacteria, whereas the MPN procedure only indicates the presence or absence of an approximate number or organisms.The concentration of larger samples on a membrane filter is a key benefit of the technique over the MPN procedure as well as over Pour Plate and Spread Plate techniques.

Many industry and U.S. EPA test procedures require samples of 100 mL or more to be analyzed for the presence of bacteria. The Pour Plate technique is limited to a sample volume of 2 mL and the Spread Plate technique has a limit of 0.5 mL.

Using the Membrane Filter Technique, a 100 mL sample is passed through a 47 mm membrane using a filter funnel and vacuum system. Any organisms in the sample are concentrated on the surface of the membrane. The filter is then placed in a petri dish with nutrient medium. The passage of nutrients through the filter facilitates the growth of organisms on the upper surface of the membrane. The discrete colonies that form on the surface of the membrane can be easily transferred to confirmation media.

Municipal water treatment plants monitor drinking, waste, and surface water for the presence of coliform bacteria by the MF Technique. The key organism monitored in water treatment facilities is E. coli. The U.S. EPA considers this organism the leading indicator of fecal contamination.

In addition to its use by government labs for monitoring drinking water, the Membrane Filter Technique is also used for microbial monitoring in the pharmaceutical, cosmetics, electronics, and food and beverage industries. The MF Technique is used in these industrial labs to monitor the presence of microorganisms in process waters and final product.

The pharmaceutical and cosmetics industries typically focus on monitoring their process water for Pseudomonas species. The electronics industry monitors for any and all microorganisms because they must keep their process water free from even the smallest organisms. Microbial monitoring in the food and beverage industry typically employs several types of techniques because of the variety of samples that are encountered. Beverage samples can typically be monitored for microorganisms by the MF Technique, but when solid samples cannot be liquefied, alternative methods must be used.

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31 items
  1. Cellulose Acetate CA Membrane Filters, 0.22 um, 293mm, Nonsterile, 25 per pack, SF15100 Cellulose Acetate CA Membrane Filters, 0.22 um, 293mm, Nonsterile, 25 per pack, SF15100

    Regular Price: $310.52

    Price $274.50

  2. PTFE Hydrophilic Membrane Filters, 0.45 um, 293mm, Nonsterile, 25 per pack, SF13849 PTFE Hydrophilic Membrane Filters, 0.45 um, 293mm, Nonsterile, 25 per pack, SF13849

    Regular Price: $567.36

    Price $501.55

  3. Nylon Membrane Filters, 0.45 um, 293mm, Nonsterile, 50 per pack, SF14546 Nylon Membrane Filters, 0.45 um, 293mm, Nonsterile, 50 per pack, SF14546

    Regular Price: $562.99

    Price $497.68

  4. Polypropylene Membrane Filters, 0.20 um, 293mm, Nonsterile, 25 per pack, SF14894 Polypropylene Membrane Filters, 0.20 um, 293mm, Nonsterile, 25 per pack, SF14894

    Regular Price: $195.30

    Price $172.65

  5. Polypropylene Membrane Filters, 3.00 um, 293mm, Nonsterile, 25 per pack, SF14900 Polypropylene Membrane Filters, 3.00 um, 293mm, Nonsterile, 25 per pack, SF14900

    Regular Price: $158.83

    Price $138.12

  6. MCE Membrane Filters, 0.65 um, 293mm, Nonsterile, 25 per pack, SF14678 MCE Membrane Filters, 0.65 um, 293mm, Nonsterile, 25 per pack, SF14678

    Regular Price: $228.34

    Price $201.85

  7. PES Membrane Filters, 0.22 um, 293mm, Nonsterile, 50 per pack, SF18092 PES Membrane Filters, 0.22 um, 293mm, Nonsterile, 50 per pack, SF18092

    Regular Price: $464.60

    Price $404.00

  8. Cellulose Acetate CA Membrane Filters, 3.00 um, 293mm, Nonsterile, 25 per pack, SF15118 Cellulose Acetate CA Membrane Filters, 3.00 um, 293mm, Nonsterile, 25 per pack, SF15118

    Regular Price: $310.52

    Price $274.50

  9. Nylon Membrane Filters, 0.10 um, 293mm, Nonsterile, 50 per pack, SF14544 Nylon Membrane Filters, 0.10 um, 293mm, Nonsterile, 50 per pack, SF14544

    Regular Price: $562.99

    Price $497.68

  10. Nylon Membrane Filters, 3.00 um, 293mm, Nonsterile, 50 per pack, SF14549 Nylon Membrane Filters, 3.00 um, 293mm, Nonsterile, 50 per pack, SF14549

    Regular Price: $562.99

    Price $497.68

  11. Polypropylene Membrane Filters, 1.20 um, 293mm, Nonsterile, 25 per pack, SF14898 Polypropylene Membrane Filters, 1.20 um, 293mm, Nonsterile, 25 per pack, SF14898

    Regular Price: $207.02

    Price $183.01

  12. MCE Membrane Filters, 0.22 um, 293mm, Nonsterile, 25 per pack, SF14676 MCE Membrane Filters, 0.22 um, 293mm, Nonsterile, 25 per pack, SF14676

    Regular Price: $236.76

    Price $209.30

  13. MCE Membrane Filters, 3.00 um, 293mm, Nonsterile, 25 per pack, SF14681 MCE Membrane Filters, 3.00 um, 293mm, Nonsterile, 25 per pack, SF14681

    Regular Price: $284.12

    Price $251.16

  14. Cellulose Acetate CA Membrane Filters, 0.45 um, 293mm, Nonsterile, 25 per pack, SF15106 Cellulose Acetate CA Membrane Filters, 0.45 um, 293mm, Nonsterile, 25 per pack, SF15106

    Regular Price: $310.52

    Price $274.50

  15. PTFE Membrane Filters, 0.22 um, 293mm, Nonsterile, 25 per pack, SF13859 PTFE Membrane Filters, 0.22 um, 293mm, Nonsterile, 25 per pack, SF13859

    Regular Price: $567.36

    Price $501.55

  16. Nylon Membrane Filters, 0.80 um, 293mm, Nonsterile, 50 per pack, SF14547 Nylon Membrane Filters, 0.80 um, 293mm, Nonsterile, 50 per pack, SF14547

    Regular Price: $562.99

    Price $497.68

  17. Polypropylene Membrane Filters, 0.45 um, 293mm, Nonsterile, 25 per pack, SF14895 Polypropylene Membrane Filters, 0.45 um, 293mm, Nonsterile, 25 per pack, SF14895

    Regular Price: $195.30

    Price $172.65

  18. Polypropylene Membrane Filters, 1.0 um, 293mm, Nonsterile, 25 per pack, SF14897 Polypropylene Membrane Filters, 1.0 um, 293mm, Nonsterile, 25 per pack, SF14897

    Regular Price: $158.84

    Price $138.12

  19. MCE Membrane Filters, 0.80 um, 293mm, Nonsterile, 25 per pack, SF14679 MCE Membrane Filters, 0.80 um, 293mm, Nonsterile, 25 per pack, SF14679

    Regular Price: $284.12

    Price $251.16

  20. PTFE Hydrophilic Membrane Filters, 0.22 um, 293mm, Nonsterile, 25 per pack, SF13844 PTFE Hydrophilic Membrane Filters, 0.22 um, 293mm, Nonsterile, 25 per pack, SF13844

    Regular Price: $567.36

    Price $501.55

  21. Nylon Membrane Filters, 0.22 um, 293mm, Nonsterile, 50 per pack, SF14545 Nylon Membrane Filters, 0.22 um, 293mm, Nonsterile, 50 per pack, SF14545

    Regular Price: $562.99

    Price $497.68

  22. Nylon Membrane Filters, 5.00 um, 293mm, Nonsterile, 25 per pack, SF14550 Nylon Membrane Filters, 5.00 um, 293mm, Nonsterile, 25 per pack, SF14550

    Regular Price: $286.17

    Price $248.84

  23. Polypropylene Membrane Filters, 5.00 um, 293mm, Nonsterile, 25 per pack, SF14901 Polypropylene Membrane Filters, 5.00 um, 293mm, Nonsterile, 25 per pack, SF14901

    Regular Price: $158.84

    Price $138.12

  24. MCE Membrane Filters, 0.45 um, 293mm, Nonsterile, 25 per pack, SF14677 MCE Membrane Filters, 0.45 um, 293mm, Nonsterile, 25 per pack, SF14677

    Regular Price: $236.76

    Price $209.30

  25. MCE Membrane Filters, 5.00 um, 293mm, Nonsterile, 25 per pack, SF14682 MCE Membrane Filters, 5.00 um, 293mm, Nonsterile, 25 per pack, SF14682

    Regular Price: $284.12

    Price $251.16

  26. Cellulose Acetate CA Membrane Filters, 0.80 um, 293mm, Nonsterile, 25 per pack, SF15112 Cellulose Acetate CA Membrane Filters, 0.80 um, 293mm, Nonsterile, 25 per pack, SF15112

    Regular Price: $310.52

    Price $274.50

  27. PTFE Membrane Filters, 0.45 um, 293mm, Nonsterile, 25 per pack, SF13864 PTFE Membrane Filters, 0.45 um, 293mm, Nonsterile, 25 per pack, SF13864

    Regular Price: $567.36

    Price $501.55

  28. Nylon Membrane Filters, 1.0 um, 293mm, Nonsterile, 50 per pack, SF14548 Nylon Membrane Filters, 1.0 um, 293mm, Nonsterile, 50 per pack, SF14548

    Regular Price: $562.99

    Price $497.68

  29. Polypropylene Membrane Filters, 0.80 um, 293mm, Nonsterile, 25 per pack, SF14896 Polypropylene Membrane Filters, 0.80 um, 293mm, Nonsterile, 25 per pack, SF14896

    Regular Price: $207.02

    Price $183.01

  30. MCE Membrane Filters, 0.10 um, 293mm, Nonsterile, 25 per pack, SF14675 MCE Membrane Filters, 0.10 um, 293mm, Nonsterile, 25 per pack, SF14675

    Regular Price: $228.34

    Price $201.85

  31. MCE Membrane Filters, 1.20 um, 293mm, Nonsterile, 25 per pack, SF14680 MCE Membrane Filters, 1.20 um, 293mm, Nonsterile, 25 per pack, SF14680

    Regular Price: $228.34

    Price $201.85

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31 items