Description
Volumetric flask 20 ml, class A, with batch certificate, NS 7/16 ground joint and PE stopper is a precision laboratory vessel for accurate volume determination. Manufactured from borosilicate glass 3.3 in Diffico brown, it combines chemical resistance with the mechanical stability needed for routine analytical work. Every flask is marked with a batch number and delivered together with a batch certificate enclosed in the original packaging, providing documented conformity and full traceability. The class A tolerance supports reliable preparation of standard solutions and quantitative assays. The PE stopper ensures a tight, chemically inert closure while the NS 7/16 joint guarantees compatibility with standard laboratory ground-glass connections. Net weight is 0,018 kg. Supplied in packs of 10 pc(s), these brown Diffico volumetric flasks from manufacturer Witeg are intended for applications requiring both volumetric accuracy and light protection. The combination of certified class A performance, batch documentation and robust borosilicate construction makes the flask suitable for quality-controlled laboratory environments where reproducible results are essential.
This article is part of Volumetric flasks, in Volumetric glassware.
Key features
- Pack size: 10 pc(s)
- Volume: 20 ml
- Accuracy class: A
- Joint size: NS 7/16
- Stopper: PE
- Material: Borosilicate glass 3.3
- Technical Information Sheet:
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Questions about Volumetric flask, 20 ml, A, CC, ST 7/16, PE
What is this article?
Volumetric flask, 20 ml, A, CC, ST 7/16, PE is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Volumetric flasks, inside Volumetric glassware, in Labware.
A volumetric flask is calibrated to contain one volume at a reference temperature, with a single mark on a narrow neck. Class A is the tight tolerance. It is not a storage bottle and it is not for heating. The stopper is part of the calibrated article.
Volumetric glassware is glass that has been calibrated to contain or to deliver one stated volume at a reference temperature. That calibration is the whole point. Class A and class AS have a tighter tolerance than class B. A volumetric flask contains. A pipette and a burette deliver. A measuring cylinder is the coarser reading, used when the volume is not the result. The classes sit under ISO laboratory glassware. The chain back to the unit of volume is the work of the BIPM and of NIST.
Which category should I open next?
The category is Volumetric glassware. The sub-category is Volumetric flasks. The catalogue is Labware.
Shelves beside this one are Measuring cylinders, Burettes, Mixing cylinders and Volumetric accessories & certificates.
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.