Description
Valve stopcock for burette, straight bore, Boro 3.3, for burette 2–10 ml with valve opening 0–2,5 mm is a precision glass control component for volumetric titration work. Manufactured from borosilicate glass 3.3, the straight-bore valve stopcock provides a clear, controllable flow path for aqueous and many common laboratory reagents used in analytical chemistry. It is intended for burettes in the 2 ml to 10 ml range, where fine adjustment of the outlet is essential for accurate endpoint determination. The adjustable valve opening from 0 to 2,5 mm supports both rapid filling and slow, dropwise delivery during titration. Supplied as a single piece from manufacturer Brand, this stopcock suits replacement or assembly of glass burette systems in teaching, quality-control, and routine analytical laboratories. Categories such as valves, plug cocks, valve stopcocks, and shut-off valves reflect its role as a dedicated flow-control element rather than a complete burette. The robust Boro 3.3 construction offers the thermal and chemical resistance expected of laboratory glassware for everyday volumetric procedures. Pack size is 1 pc, ready for integration into compatible burette setups requiring a straight-bore valve stopcock with a 0–2,5 mm opening.
This article is part of Burettes, in Volumetric glassware.
Key features
- Pack size: 1 pc
- Product type: Valve stopcock for burette
- Material: Borosilicate glass 3.3 (Boro 3.3)
- Bore design: Straight bore
- Compatible burette volume: 2–10 ml
- EAN: 4033378252111
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Questions about Needle-valve stopc./bur. straight stopc., f. bur.cap. 2-10 ml valve open.0-2,5 m
What is this article?
Needle-valve stopc./bur. straight stopc., f. bur.cap. 2-10 ml valve open.0-2,5 m is the article on this page. Luminix Health distributes Brand 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.