Description
Volumetric flask 400 ml, class A, conformity certified (KB), with NS 19/26 ground joint and PE stopper is a precision laboratory vessel for accurate volume measurement. Manufactured from borosilicate glass 3.3 in Diffico brown, it is supplied complete with a polyethylene stopper. Every flask carries a batch number, and a batch certificate is included with each original packaging. The amber-brown Diffico glass is intended for work with light-sensitive media while class A tolerances support calibrated analytical procedures. Pack size is 10 pieces; net weight is 0,144 kg. These flasks from manufacturer Witeg feature the standard NS 19/26 joint for reliable stopper seating and are produced for routine volumetric work in chemistry, quality-control and research laboratories. The combination of certified class A accuracy, batch traceability and robust borosilicate construction makes the 400 ml Diffico brown volumetric flask a practical choice for laboratories requiring documented glassware. The PE stopper seals the ground joint securely during preparation, storage and transfer of measured solutions.
This article is part of Volumetric flasks, in Volumetric glassware.
Key features
- Pack size: 10 pc(s)
- Volume: 400 ml
- Accuracy class: A, conformity certified (KB)
- Joint: NS 19/26
- Stopper: PE
- Material: Borosilicate glass 3.3, Diffico brown
- Technical Information Sheet:
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Questions about Volumetric flask, 400 ml, A, CC, ST 19/26, PE
What is this article?
Volumetric flask, 400 ml, A, CC, ST 19/26, 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.
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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.