Description
Burette stopcock for 50 ml, solid straight DURAN is a precision glass fitting for volumetric titration and controlled liquid delivery with 50 ml burettes. Manufactured from DURAN tubing in borosilicate glass 3.3 and carrying the DURAN® mark, this straight stopcock has a solid plug, NS 12,5 ground joint and a 1,6 mm bore in accordance with DIN 12541. The solid-plug geometry supports dependable sealing and smooth flow control when dispensing titrants and reagents in quantitative analytical work. Intended as a dedicated accessory or replacement part for 50 ml burettes, it suits educational, research and quality-control laboratories that maintain classical glass burette systems. The component from manufacturer Witeg is supplied as a single piece with a net weight of 0,038 kg. Borosilicate glass 3.3 provides the chemical durability and thermal stability expected of routine laboratory glassware. This stopcock helps keep volumetric apparatus serviceable where accurate, repeatable liquid handling is required in everyday analytical workflows.
This article is part of Burettes, in Volumetric glassware.
Key features
- Pack size: 1 pc
- Material: Borosilicate glass 3.3
- Joint size: NS 12,5
- Bore: 1,6 mm
- Design: Solid straight plug
- Standard: DIN 12541
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Questions about Stopcock for burettes straight ST 12,5
What is this article?
Stopcock for burettes straight ST 12,5 is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Burettes, inside Volumetric glassware, in Matériel de laboratoire.
A burette delivers a measured volume through a stopcock, which is how a titration is read. Class A and class AS state the tolerance. The stopcock, glass or PTFE, and the volume of the burette are the choices. A dirty bore changes the delivered volume.
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 Burettes. The catalogue is Matériel de laboratoire.
Shelves beside this one are Volumetric flasks, Measuring cylinders, 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.