Description
Durham tubes 25x7 mm are compact glass tubes intended for microbiological gas detection and classic fermentation assays. Each tube measures 25 mm in length with an outer diameter of 7 mm and a wall thickness of 0,7 mm, giving a nominal fill volume of 0,5 ml. Made from borosilicate glass Fiolax, they have a round bottom, a straight rim and are supplied ungraduated so gas bubbles remain easy to observe. In routine use the small tubes are inverted inside larger culture tubes to trap gas released during microbial metabolism. The durable glass construction from manufacturer Marienfeld withstands typical laboratory handling and repeated sterilisation cycles. Supplied in packs of 1000 pieces (boxes of 10×100), they support high-throughput microbiology, teaching laboratories and quality-control workflows that require consistent dimensions and optical clarity. Their compact geometry and defined volume make them a practical consumable for Durham tube tests and related fermentation studies in research and diagnostic settings.
This article is part of Test tubes, in Tubes & vials.
Key features
- Pack size: 1000 pc(s)
- Material: borosilicate glass Fiolax
- Length: 25 mm
- Outer diameter: 7 mm
- Wall thickness: 0,7 mm
- EAN: 4250317309693
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Questions about Durham tubes 25x7 mm,
What is this article?
Durham tubes 25x7 mm, is the article on this page. Luminix Health distributes Marienfeld for laboratory use. It sits in Test tubes, inside Tubes & vials, in Labware.
A test tube is the open cylindrical vessel for a small liquid, in borosilicate glass or in plastic. Rimmed and rimless mouths differ. The size is diameter by length. It is not graduated for a result, and a glass tube that will be centrifuged has a force limit.
A tube holds a small sample upright. A test tube is the open glass or plastic cylinder. A centrifuge tube is conical so a pellet forms at the tip, and it is rated for a centrifugal force the rotor will actually reach. A vial is a small closed bottle, often for a sample that will sit in an instrument. NMR tubes are a special case: the glass has to be uniform or the spectrum is the tube, not the sample. Laboratory ware is listed under ISO laboratory glassware.
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The category is Tubes & vials. The sub-category is Test tubes. The catalogue is Labware.
Shelves beside this one are Centrifuge tubes (conical), Sample vials & NMR tubes and Tube & vial accessories.
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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.
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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.
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.