Beschreibung
Burette stopcock, straight with PTFE plug, is a DURAN glass stopcock featuring an NS 12,5 joint and a 1,6 mm bore, manufactured in accordance with DIN 12541. The straight body is produced from DURAN tubing of borosilicate glass 3.3 and fitted with a PTFE plug for smooth, chemically resistant shut-off. Available from manufacturer Witeg, the stopcock is designed for integration into laboratory burette assemblies where reliable flow control and solvent compatibility are required. The PTFE plug reduces the need for grease, simplifies cleaning and maintains a tight seal under typical titration conditions. Borosilicate glass 3.3 provides high chemical durability and thermal shock resistance, while the defined 1,6 mm bore supports controlled reagent delivery. With a net weight of 0,034 kg and supplied as a single piece, the unit serves as a replacement or original-equipment component for straight burette configurations. DIN 12541 conformity ensures dimensional compatibility with standard laboratory glassware used in analytical, teaching and quality-control environments.
This article is part of Burettes, in Volumetric glassware.
Key features
- Pack size: 1 pc(s)
- Joint size: NS 12,5
- Bore: 1,6 mm
- Plug type: PTFE plug
- Material: Borosilicate glass 3.3 (DURAN)
- Standard: DIN 12541
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Questions about Stopcock f. burettes straight PTFE-plug
What is this article?
Stopcock f. burettes straight PTFE-plug is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Burettes, inside Volumetric glassware, in Laborbedarf.
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 Laborbedarf.
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.