Description
Daffert burette Schellbach with PTFE key is a class B volumetric glass instrument of 25 ml capacity graduated in 0,05 ml increments for accurate liquid dispensing in titration work. It incorporates a two-way stopcock fitted with a PTFE key that ensures smooth operation, chemical resistance and reliable sealing during repeated use. The Schellbach stripe running along the scale improves meniscus contrast and readability, helping to minimise parallax and reading errors in analytical procedures. Supplied as a pack of 2 pieces from manufacturer Witeg, these burettes are produced in Germany and suited to routine quantitative analysis, acid-base titrations, redox determinations and educational laboratory exercises where class B tolerance is specified. The combination of borosilicate glass body and inert PTFE key offers broad compatibility with aqueous reagents and many common laboratory solutions. With a net weight of 0,096 kg the units remain lightweight yet robust for everyday bench handling in pharmaceutical, environmental, food and general wet-chemistry laboratories requiring dependable volumetric performance.
This article is part of Burettes, in Volumetric glassware.
Key features
- Pack size: 2 pc(s)
- Product type: Daffert burette Schellbach
- Capacity: 25 ml
- Graduation: 0,05 ml
- Accuracy class: B
- Stopcock: Two-way PTFE key
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Questions about Burettes, Daffert, class: B, 25 ml:0,05
What is this article?
Burettes, Daffert, class: B, 25 ml:0,05 is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Burettes, inside Volumetric glassware, in Labware.
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 Labware.
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.