Beschrijving
The burette stopcock, straight with solid NS plug, D=50 is a laboratory glassware fitting for controlled liquid flow in volumetric and titration work. It has a straight configuration with a solid ground NS plug at NS 12,5 and a bore of 1,6 mm, and is manufactured from DURAN tubing in accordance with DIN 12541. The solid plug design supports a stable seal at the stopcock joint, which is important when dispensing reagents from burettes during analytical procedures. Supplied as 1 pc with a net weight of 0,033 kg, this component is intended for assembly or replacement on compatible burette systems in research, quality-control and teaching laboratories. The standardised NS joint and defined bore allow integration into existing glassware setups that follow common European laboratory dimensions. Produced by manufacturer Witeg, the stopcock is suited to routine wet-chemistry workflows where durable glass construction and reproducible flow geometry are required. Its straight form simplifies installation and cleaning compared with angled alternatives, supporting everyday use in analytical and preparative laboratory practice.
This article is part of Burettes, in Volumetric glassware.
Key features
- Pack size: 1 pc
- Configuration: Straight with solid NS plug
- Joint size: NS 12,5
- Bore: 1,6 mm
- Standard: DIN 12541
- Material: DURAN tubing
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Questions about Stopcock for burettes ST 12,5
What is this article?
Stopcock for burettes ST 12,5 is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Burettes, inside Volumetric glassware, in Labmateriaal.
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 Labmateriaal.
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.