Burette Class B With Glass Stopcock
Product Code : EL-GB-10145
Lab Glassware Manufacturer manufactures and exports the Burette Class B With Glass Stopcock from its production base in Ambala, Haryana, in continuous operation since 1982, supplying school and college science laboratories, university research departments, and export buyers that have recently included institutions in Nepal, Bangladesh and Sri Lanka — part of a wider base of enquiries from across South Asia.
Quick answer: This is a straight, Class B tolerance glass burette fitted with a glass key stopcock and amber enamel graduation, a traditional and economical choice for routine teaching and laboratory titration work.
Burette Class B With Glass Stopcock — Specification
| Feature | Detail |
|---|---|
| Material | Borosilicate glass |
| Stopcock | Glass key stopcock |
| Tolerance class | Class B |
| Print colour | Amber enamel graduation |
| Standards | Manufactured to align with ISO 385 (Laboratory glassware – Burettes) and ASTM E287 (Standard Specification for Laboratory Glass Burets) |
Glass Stopcock vs PTFE Stopcock
A glass key stopcock is the traditional design for a burette, and needs a thin film of stopcock grease to turn smoothly and seal properly. It is a lower-cost option than a PTFE stopcock, and is a common choice for routine teaching and laboratory titration work where Class A certified accuracy is not required. For a grease-free PTFE alternative, see Burette Class-B with PTFE Key Stopcock.
Frequently Asked Questions
Does a glass stopcock need grease?
Yes, a thin film of stopcock grease is normally applied to a glass key stopcock so it turns smoothly and seals properly.
What does Class B mean?
Class B is a standard volumetric tolerance level suited to routine teaching and laboratory titration, as distinct from the tighter, individually serialized Class A tolerance.
Is a PTFE stopcock version available?
Yes, see Burette Class-B with PTFE Key Stopcock for the grease-free option.
What capacity is available?
Send your required capacity with your enquiry so a quotation can be prepared against the correct specification.
How should the stopcock be maintained?
Re-grease lightly if the stopcock becomes stiff or leaks, and avoid over-tightening the retaining nut, which can crack the barrel.
Do you export this burette outside India?
Yes, burettes are supplied to institutional and distributor buyers outside India alongside other titration equipment. Confirm packing and quantity requirements at enquiry stage.
Related Products
Other burettes and burette accessories from Lab Glassware Manufacturer: Burette Class-B with PTFE Key Stopcock, Burette Serialized with PTFE Key Stopcock, Burette Brush, Burette Clamp Aluminium.
Request a Quote
Ready to order the Burette Class B With Glass Stopcock for your laboratory, institutional or export order? Contact Us for a quotation, or visit the Tenders page for bulk and institutional procurement.
Last updated: September 2026.