Beschreibung
Burette stopcock for 25 ml with PTFE plug, straight is a laboratory glass fitting engineered for precise flow control on 25 ml burettes. Fabricated from DURAN tubing, the straight design incorporates an NS 12,5 joint and a 1,6 mm bore conforming to DIN 12541, guaranteeing interchangeability with standard volumetric glassware. A PTFE plug delivers consistent shut-off, low-friction operation and resistance to a wide spectrum of titration reagents. Net weight is 0,03 kg, supporting easy installation and everyday bench use. This accessory from manufacturer Witeg is specified for 25 ml burettes that require a straight PTFE-plug configuration. It enables fine metering of titrant in analytical, quality-control and educational laboratories, helping operators achieve reproducible endpoints. The DURAN glass construction provides the chemical durability and thermal stability typical of laboratory borosilicate systems, while the PTFE Küken reduces seizing and simplifies maintenance. Suitable for aqueous solutions and many organic media encountered in classical wet chemistry, the stopcock functions as either original equipment or a direct replacement part on compatible 25 ml burette assemblies where leak-free performance is essential.
This article is part of Burettes, in Volumetric glassware.
Key features
- Pack size: 1 pc
- Design: Straight burette stopcock
- Joint size: NS 12,5
- Bore diameter: 1,6 mm
- Plug material: PTFE
- Glass: DURAN tubing
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Questions about stopcock f. burettes 25 ml w PTFE-plug
What is this article?
stopcock f. burettes 25 ml w 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.