Description
PORA CM membrane filters are black gridded membrane discs designed for laboratory filtration and visual counting of colonies or particles. Each disc offers a pore size of 0,45 µm and a diameter of 50 mm, combined with a 3,1 mm grid on the black surface to facilitate enumeration and record-keeping during microbiological or analytical work. The dark background improves contrast of retained material under inspection, supporting reliable observation on the bench or under magnification. Supplied in packs of 100 pieces, these PORAFIL CM filters from manufacturer Macherey-Nagel are intended for routine membrane filtration where a defined pore width and gridded layout are essential. The filters are non-sterile, so laboratories can apply their own sterilisation or handling procedures as required. The 50 mm diameter matches common filter holders and funnels used in water analysis, quality control, research and environmental testing environments that need consistent, easy-to-read membrane results.
This article is part of Membrane filters, in Filtration.
Key features
- Pack size: 100 pc(s)
- Membrane type: PORAFIL CM
- Colour: Black
- Grid: 3,1 mm
- Pore size: 0,45 µm
- EAN: 4046681009006
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Questions about PORA CM, black 3,1mm G PW:0,45 µm d: 50
What is this article?
PORA CM, black 3,1mm G PW:0,45 µm d: 50 is the article on this page. Luminix Health distributes Macherey-Nagel for laboratory use. It sits in Membrane filters, inside Filtration, in Lab consumables.
A membrane filter is the disc itself, without a syringe housing. Pore size, polymer and diameter are the specification, and the disc has to sit in a holder. Gridded membranes are for counting colonies. A membrane and a filter paper of the same diameter are not interchangeable.
Filtration holds back what is larger than the pores and lets the rest through. Paper is the ordinary laboratory filter. A membrane has a stated pore size and a polymer that must survive the solvent. A syringe filter is that membrane in a housing on a syringe. Glass fibre takes a higher dirt load. Ultrafiltration holds back macromolecules and passes salts. The pore size, the chemical compatibility and the volume are the three choices. Laboratory apparatus around filtration is indexed under ISO laboratory apparatus.
Which category should I open next?
The category is Filtration. The sub-category is Membrane filters. The catalogue is Lab consumables.
Shelves beside this one are Filter paper, Sintered glass filter plates & discs, Syringe filters, Filter cartridges & capsules, Glass & quartz fibre filters, Bottle-top & vacuum filtration units, Ultrafiltration & concentrators, Filtration accessories, Extraction thimbles and Dialysis tubing & devices.
What should I check before I order?
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
How does ordering and shipping work?
Luminix Health distributes this article from the heart of Europe. Articles in stock ship within 2–5 business days. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
Which other categories should I open?
The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.