Description
Volumetric pipettes 20 ml, class AS are precision single-mark glass instruments intended for accurate delivery of fixed liquid volumes in analytical chemistry, biochemistry and quality-control environments. Each pipette is adjusted to “Ex” (to deliver), conforms to DIN EN ISO 648 and features one ring mark with brown graduations, a colour code and printed tolerance indication. Constructed from soda-lime glass, they offer clear visibility of the meniscus and sufficient chemical durability for aqueous and many common laboratory media. Packed 25 pieces per carton from manufacturer Marienfeld, these class AS volumetric pipettes enable reproducible transfer of reagents, standards and samples at the nominal volume of 20 ml. The single-ring design simplifies filling to the calibration line and reduces reading errors relative to graduated pipettes, while remaining fully compatible with standard pipette aids. They are well suited to titration procedures, volumetric solution preparation, sample dilution and teaching laboratories that require class AS performance. Robust yet lightweight construction supports repeated daily use in research, industrial and educational settings.
This article is part of Volumetric pipettes, in Pipettes & pipette tips.
Key features
- Pack size: 25 pc(s)
- Accuracy class: AS
- Nominal volume: 20 ml
- Material: Soda-lime glass
- Calibration: Adjusted to Ex, DIN EN ISO 648
- EAN: 4250317304841
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Questions about Volumetric pipettes 20 ml, class AS,
What is this article?
Volumetric pipettes 20 ml, class AS, is the article on this page. Luminix Health distributes Marienfeld for laboratory use. It sits in Volumetric pipettes, inside Pipettes & pipette tips, in Consommables.
A volumetric pipette has a single mark and a bulb, and it delivers one volume with a tighter tolerance than a graduated pipette. It is for preparing standards. It is not for reagents that attack glass, and it is not a blow-out pipette unless it is marked as one.
A pipette moves a measured volume. A volumetric pipette delivers one line. A graduated pipette delivers along a scale. A Pasteur pipette is an uncalibrated transfer. A piston pipette uses a tip, and the tip has to seal on that pipette. A filter tip adds a barrier so aerosol from the sample does not reach the piston. Serological pipettes are the long graduated tubes used with a controller. The volume and the fit are the specification. Piston pipettes are treated under ISO laboratory apparatus. In-vitro work also meets ISO in vitro diagnostic systems.
Which category should I open next?
The category is Pipettes & pipette tips. The sub-category is Volumetric pipettes. The catalogue is Consommables.
Shelves beside this one are Pipette tips, Filter tips, Pipetting accessories, Graduated pipettes, Pasteur pipettes, Pipette controllers & fillers, Reagent reservoirs, Dispenser & repeater tips and Serological pipettes.
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.