Laboratory & Chemical
Low-form borosilicate weighing bottles with matched ground-glass covers, 5 to 100 ml, for gravimetric work, loss on drying and hygroscopic samples.
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 weighing bottle lets you weigh a solid accurately when it would otherwise pick up or lose moisture in open air. Its close-fitting ground-glass cover seals the sample so its mass doesn’t change between weighing and use, which is essential for gravimetric analysis.
The low, flat form gives a wide opening for adding and removing solids and a stable, easy-to-handle shape on the balance pan, while the ground cover protects hygroscopic or volatile samples.
Weighing bottles are used for gravimetric analysis, weighing hygroscopic solids, loss-on-drying tests, moisture determination and holding samples between weighings. They are routine equipment in analytical and QC labs, pharmaceutical and food-testing labs, and analytical chemistry teaching. Flat forms suit drying work because they spread the sample in a thin layer; tall forms suit liquids and samples that need less surface exposure.
Each bottle is low-form borosilicate 3.3 glass with a wide ground-glass joint and a flat ground cover matched to it. The cover seats with an even, close fit that limits moisture exchange. Borosilicate glass is oven-dryable, so bottle and sample can be dried to constant mass together. Bottles and covers are numbered as matched sets so they stay together through washing and drying.
Handle weighing bottles with tongs or a lint-free tissue rather than bare fingers, so skin oils and moisture don’t change the mass. Dry the bottle, cool it in a desiccator and weigh, repeating until the mass is constant. During oven drying, set the cover ajar or alongside the bottle, then close it as soon as the bottle comes out. Keep each cover with its own numbered bottle.
We form the bottles from borosilicate 3.3, grind each joint and cover to a close matched fit, anneal the set and number it. Joint fit, for a good seal, and a stable base are the key production checks. We can supply low or tall forms, inner (stopper-type) or outer (cap-type) covers, custom diameters and heights, and matched sets packed in counts. Send us your dimensions and quantities 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.