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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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34 items
  1. PTFE Hydrophilic Membrane Filters, 1.0 um, 8 inch x 10 inch, Nonsterile, 20 per pack, SPEC17991 PTFE Hydrophilic Membrane Filters, 1.0 um, 8 inch x 10 inch, Nonsterile, 20 per pack, SPEC17991

    Regular Price: $227.95

    Price $198.22

  2. Nylon Membrane Filters, 1.0 um, 142mm, Nonsterile, 50 per pack, SF14541 Nylon Membrane Filters, 1.0 um, 142mm, Nonsterile, 50 per pack, SF14541

    Regular Price: $171.76

    Price $125.04

  3. Polypropylene Membrane Filters, 1.0 um, 125mm, Nonsterile, 25 per pack, SF14881 Polypropylene Membrane Filters, 1.0 um, 125mm, Nonsterile, 25 per pack, SF14881

    Regular Price: $163.08

    Price $144.16

  4. Nylon Membrane Filter, 1.00 um, 37mm 200/pk, SF18097 Nylon Membrane Filter, 1.00 um, 37mm 200/pk, SF18097

    Regular Price: $119.12

    Price $103.59

  5. PTFE Membrane Filters, 1.0 um, 13mm, Nonsterile, 200 per pack, SF15126 PTFE Membrane Filters, 1.0 um, 13mm, Nonsterile, 200 per pack, SF15126

    Regular Price: $145.42

    Price $128.55

  6. PTFE Membrane Filters, 1.0 um, 50mm, Nonsterile, 100 per pack, SF14686 PTFE Membrane Filters, 1.0 um, 50mm, Nonsterile, 100 per pack, SF14686

    Regular Price: $157.31

    Price $139.06

  7. PTFE Membrane Filters, 1.0 um, 150mm, Nonsterile, 50 per pack, SF13868 PTFE Membrane Filters, 1.0 um, 150mm, Nonsterile, 50 per pack, SF13868

    Regular Price: $528.44

    Price $467.14

  8. Nylon Membrane Filters, 1.0 um, 47mm, Nonsterile, 200 per pack, SF14528 Nylon Membrane Filters, 1.0 um, 47mm, Nonsterile, 200 per pack, SF14528

    Regular Price: $117.19

    Price $103.59

  9. Polypropylene Membrane Filters, 1.0 um, 47mm, Nonsterile, 200 per pack, SF14905 Polypropylene Membrane Filters, 1.0 um, 47mm, Nonsterile, 200 per pack, SF14905

    Regular Price: $95.27

    Price $84.22

  10. MCE Membrane Filters, 1.0 um, 37mm, Nonsterile, 200 per pack, SF15140 MCE Membrane Filters, 1.0 um, 37mm, Nonsterile, 200 per pack, SF15140

    Regular Price: $71.28

    Price $63.01

  11. PTFE Membrane Filters, 1.0 um, 82.6mm, Nonsterile, 50 per pack, SF16015 PTFE Membrane Filters, 1.0 um, 82.6mm, Nonsterile, 50 per pack, SF16015

    Regular Price: $237.99

    Price $206.95

  12. PTFE Hydrophilic Membrane Filters, 1.0 um, 47mm, Nonsterile, 200 per pack, SF13851 PTFE Hydrophilic Membrane Filters, 1.0 um, 47mm, Nonsterile, 200 per pack, SF13851

    Regular Price: $274.92

    Price $243.03

  13. PTFE Membrane Filters, 1.0 um, 142mm, Nonsterile, 50 per pack, SF15132 PTFE Membrane Filters, 1.0 um, 142mm, Nonsterile, 50 per pack, SF15132

    Regular Price: $548.88

    Price $485.21

  14. Nylon Membrane Filters, 1.0 um, 13mm, Nonsterile, 200 per pack, SF14514 Nylon Membrane Filters, 1.0 um, 13mm, Nonsterile, 200 per pack, SF14514

    Regular Price: $79.94

    Price $70.67

  15. 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

  16. Polypropylene Membrane Filters, 1.0 um, 142mm, Nonsterile, 50 per pack, SF14889 Polypropylene Membrane Filters, 1.0 um, 142mm, Nonsterile, 50 per pack, SF14889

    Regular Price: $176.41

    Price $153.40

  17. PTFE Hydrophilic Membrane Filters, 1.0 um, 25mm, Nonsterile, 200 per pack, SF13850 PTFE Hydrophilic Membrane Filters, 1.0 um, 25mm, Nonsterile, 200 per pack, SF13850

    Regular Price: $152.00

    Price $134.37

  18. PTFE Hydrophilic Membrane Filters, 1.0 um, 90mm, Nonsterile, 100 per pack, SF13852 PTFE Hydrophilic Membrane Filters, 1.0 um, 90mm, Nonsterile, 100 per pack, SF13852

    Regular Price: $510.00

    Price $435.34

  19. PTFE Membrane Filters, 1.0 um, 230mm, Nonsterile, 50 per pack, SF16001 PTFE Membrane Filters, 1.0 um, 230mm, Nonsterile, 50 per pack, SF16001

    Regular Price: $685.93

    Price $596.46

  20. Nylon Membrane Filters, 1.0 um, 90mm, Nonsterile, 100 per pack, SF14534 Nylon Membrane Filters, 1.0 um, 90mm, Nonsterile, 100 per pack, SF14534

    Regular Price: $144.78

    Price $127.98

  21. Polypropylene Membrane Filters, 1.0 um, 90mm, Nonsterile, 100 per pack, SF14873 Polypropylene Membrane Filters, 1.0 um, 90mm, Nonsterile, 100 per pack, SF14873

    Regular Price: $123.49

    Price $109.17

  22. Polyethersulfone PES Membrane Filter, 1 um, 25mm, Nonsterile, 200 per pack, SF18094 Polyethersulfone PES Membrane Filter, 1 um, 25mm, Nonsterile, 200 per pack, SF18094

    Regular Price: $83.89

    Price $74.16

  23. PTFE Membrane Filter, 55mm, Hydrophobic, 1.0 um, Used with EPA Method OTM 28 (Method 5 with 202), 50 per pack, SF17940 PTFE Membrane Filter, 55mm, Hydrophobic, 1.0 um, Used with EPA Method OTM 28 (Method 5 with 202), 50 per pack, SF17940

    Regular Price: $223.60

    Price $179.50

  24. PTFE Membrane Filters, 1.0 um, 47mm, Nonsterile, 100 per pack, SF13866 PTFE Membrane Filters, 1.0 um, 47mm, Nonsterile, 100 per pack, SF13866

    Regular Price: $104.22

    Price $90.63

  25. PTFE Hydrophilic Membrane Filters, 1.0 um, 150mm, Nonsterile, 50 per pack, SF13853 PTFE Hydrophilic Membrane Filters, 1.0 um, 150mm, Nonsterile, 50 per pack, SF13853

    Regular Price: $336.32

    Price $292.45

  26. Nylon Membrane Filters, 1.0 um, 25mm, Nonsterile, 200 per pack, SF14521 Nylon Membrane Filters, 1.0 um, 25mm, Nonsterile, 200 per pack, SF14521

    Regular Price: $86.78

    Price $76.71

  27. Polypropylene Membrane Filters, 1.0 um, 25mm, Nonsterile, 200 per pack, SF14853 Polypropylene Membrane Filters, 1.0 um, 25mm, Nonsterile, 200 per pack, SF14853

    Regular Price: $48.15

    Price $41.87

  28. 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

  29. PTFE Membrane Filters, 1.0 um, 25mm, Nonsterile, 200 per pack, SF13865 PTFE Membrane Filters, 1.0 um, 25mm, Nonsterile, 200 per pack, SF13865

    Regular Price: $143.57

    Price $126.91

  30. PTFE Membrane Filters, 1.0 um, 90mm, Nonsterile, 100 per pack, SF13867 PTFE Membrane Filters, 1.0 um, 90mm, Nonsterile, 100 per pack, SF13867

    Regular Price: $539.82

    Price $477.22

  31. MCE Membrane Filters, 1.0 um, 47mm, Nonsterile, 200 per pack, SF18113 MCE Membrane Filters, 1.0 um, 47mm, Nonsterile, 200 per pack, SF18113

    Regular Price: $79.52

    Price $70.29

  32. PTFE  Hydrophobic Membrane Filters, 1.0 um, 8 inch x 10 inch, Nonsterile, 25 per pack, SPEC20105 PTFE Hydrophobic Membrane Filters, 1.0 um, 8 inch x 10 inch, Nonsterile, 25 per pack, SPEC20105

    Regular Price: $227.95

    Price $198.22

  33. PTFE Membrane Filters, 1.0 um, 37mm, Nonsterile, 200 per pack, SF18115 PTFE Membrane Filters, 1.0 um, 37mm, Nonsterile, 200 per pack, SF18115

    Regular Price: $215.00

    Price $181.26

  34. Nylon Membrane Filters, 1.0 um, 8 inch x 10 inch, Nonsterile, 25 per pack, SPEC20112 Nylon Membrane Filters, 1.0 um, 8 inch x 10 inch, Nonsterile, 25 per pack, SPEC20112

    Regular Price: $177.10

    Price $154.00

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34 items