Description
Burettes, class AS, with a straight valve cock are precision glass volumetric instruments intended for controlled liquid delivery in titration and laboratory liquid handling. This 25 ml version is produced from DURAN® brown glass with white graduations, providing a distinct scale on the amber body for dependable volume reading throughout the run. Class AS performance supports quantitative chemical analysis, quality-control titration and teaching applications where intermediate volumes must be dispensed reproducibly. The straight valve stopcock is fitted with a PTFE spindle, enabling smooth, chemically resistant flow regulation at the outlet. Brown glass construction is suitable when light-sensitive reagents or titrants are used on the bench or held ready on a stand. Supplied in a pack of 2 pc(s), each unit weighs 0,385 kg and is convenient for paired workstations or backup capacity. These glass burettes from manufacturer Hirschmann match common titration apparatus layouts and glass burette procedures. White graduation markings remain easy to read against the brown glass during endpoint approach. They serve laboratories that require class AS burettes with a straight valve cock and PTFE spindle at 25 ml capacity.
This article is part of Burettes, in Volumetric glassware.
Key features
- Pack size: 2 pc(s)
- Class: AS
- Capacity: 25 ml
- Material: DURAN® brown glass
- Graduation: White
- Stopcock: Straight valve cock with PTFE spindle
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Questions about Burette class AS With a straight valve stopcock and a PTFE spindle, 25 ml
What is this article?
Burette class AS With a straight valve stopcock and a PTFE spindle, 25 ml is the article on this page. Luminix Health distributes Hirschmann 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?
The technical information on this page is the manufacturer's sheet. Read that, not a rewritten specification.
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.