Laboratory & Chemical
Borosilicate 3.3 burettes with PTFE stopcock and fine delivery tip, 10 to 100 ml, Class A or B, for titration in analytical, QC and teaching labs.
Specification
Product Knowledge
Background, typical uses and selection points for this product. We can send model drawings, technical data and samples to support your evaluation.
A burette delivers an accurately measured, variable volume of liquid, which makes it the core instrument of titration: titrant is added drop by drop until the reaction reaches its endpoint. The long, finely graduated tube lets the analyst read the delivered volume to a fraction of a milliliter, and a stopcock at the base controls the flow.
We fit a PTFE stopcock because it needs no grease, turns smoothly and resists almost all reagents.
Burettes are used for acid-base, redox and complexometric titration, general volumetric analysis and the standardization of solutions. They are standard equipment in QC and analytical labs, pharmaceutical and food-testing labs, environmental labs and analytical chemistry teaching. Class A burettes are chosen where titration results feed into documented quality records; Class B suits routine and student work. The 50 ml burette is the most common general-purpose size, with 10 ml and 25 ml for small-volume titrations.
Each burette is a long borosilicate 3.3 tube with a precision bore, a fine permanent scale (for example 0.1 ml divisions on a 50 ml burette), a PTFE straight-bore stopcock and a drawn delivery tip. Burettes are calibrated to deliver (TD) the indicated volume. Amber glass is available for light-sensitive titrants such as silver nitrate or potassium permanganate, and certificates for Class A models are available on request.
Rinse the burette with titrant, fill it above zero, then run liquid through the stopcock to clear air from the tip before reading. Read the meniscus at eye level. Adjust the PTFE key so it turns freely without leaking, and don’t over-tighten the retaining nut. Never heat a burette, as that can shift its calibration. Drain and rinse after use, especially with alkaline or reactive titrants.
We draw the burettes from precision-bore borosilicate tubing, fit a machined PTFE stopcock, anneal them and then calibrate before the scale is applied. Bore uniformity, for even drop size, and calibration accuracy are the key production checks. Options include amber glass, glass or PTFE stopcocks, replaceable keys and certificates for Class A batches. Send us your sizes and class for a quote.
Customization
We specify the container, closure, decoration and transit packing as one package, so every part fits and arrives ready for your filling line.
Choose from standard sizes or request a custom capacity. We supply drawings with tolerances, label panel dimensions and nominal and brimful capacity.
We match caps, liners, pumps, droppers and stoppers to the neck finish and check the seal against your contents and filling process.
Flint, amber and colored glass, with frosting, spray coating, screen printing, hot stamping or labels. Material documentation is available on request.
Partitioned cartons, layer pads or bulk pallets, with shipping marks and pallet patterns planned for your route and warehouse.
Applications
Typical markets and uses. Tell us your contents, filling process and storage conditions and we will recommend the right model and components.
We confirm availability of the standard model, and review any changes to size, color, decoration or tooling for feasibility and lead time.
We send samples and specification sheets so you can check dimensions, component fit and finish before you place the order.
Your quotation covers packing design, shipping route, Incoterms and export documents, so landed cost is clear from the start.
Bulk Quote
Tell us the quantity, specifications and destination. We will reply with pricing, lead time, sample options and technical data for your chosen model.