Burette, Class-B, with PTFE Key Stopcock Manufacturer,Supplier and Exporter in India

Burette, Class-B, with PTFE Key Stopcock (Product Code: SLE/GBu/04) is a graduated burette for delivering measured volumes of titrant, drawn in heavy-duty borosilicate glass and fitted with a PTFE key stopcock. It is intended for routine volumetric work in school, college and teaching laboratories, where Class B accuracy suits student titrations and practical examinations. The burette is made by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, as part of its borosilicate laboratory glassware in India and international markets.

Specifications

Typical Use

In an acid–base titration the burette is clamped upright on a stand, rinsed with a little of the titrant, filled above the zero line and then run into a conical flask until the indicator changes colour. The volume used is simply the final reading minus the initial reading, both taken at eye level against the bottom of the meniscus. Before the first reading, open the stopcock briefly to push any trapped air out of the jet, as a bubble there is a common cause of error in student results.

A PTFE key is normally used without stopcock grease, so there is no lubricant to smear the bore or find its way into the solution — a practical advantage for chemistry lab equipment in schools in India, where the same burettes pass through many hands each week. The 25 ml and 50 ml sizes cover most school titrations, while the 5 ml and 10 ml sizes help when reagents are costly or only small volumes are available.

Manufacturer

This Class B burette is manufactured by Jain Scientific Equipments Private Limited, the company that trades as ScienceLab from Ambala, Haryana, India. The firm produces glassware and teaching apparatus for chemistry, physics and biology laboratories and supplies them to institutions and distributors. You can read about its background and product groups on the company profile page.

Related Laboratory Equipment

Items usually set up alongside this burette for a titration:

• Burette Clamp, Die Cast – Single Clamp — grips the burette upright on a stand rod
• Burette Stand — a steady support for the burette during the run
• Conical Flask — the receiving flask that can be swirled without splashing
• Burette Brush — a long brush for cleaning the bore after use
• Burette, Class-B, with Glass Key — the same class with a glass key, for labs that prefer it

See every burette type and accessory in our Glassware Burettes category.

Frequently Asked Questions

Which capacities can I order?
Five sizes are listed: 5 ml, 10 ml, 25 ml, 50 ml and 100 ml. Mention the size and number required for each in your enquiry.

What does Class B mean for this burette?
Class B is the general-purpose accuracy grade, with a wider permitted tolerance than Class A, which makes it well matched to teaching and routine work. For the tolerance figure of a particular size, please contact us.

Does the PTFE key need greasing?
Normally not. Keep the key and barrel clean, rinse after use and avoid over-tightening the retaining fitting so the key turns smoothly.

Can the burette be dried in a hot oven?
The borosilicate glass is heat resistant, but graduated volumetric glassware is usually left to drain and air-dry rather than being heated strongly, to protect the accuracy of the scale.

Is a calibration certificate available?
Please discuss your calibration documentation requirements with us through the contact page before ordering.

What should an institutional quotation request include?
List the capacities, quantity per size, delivery address and any packing or labelling needs; this lets us quote accurately for a school or college laboratory order.

Do you supply in bulk and for export?
Yes. Burettes are supplied in quantity to schools, colleges and distributors across India and international markets.

Request a Quote

For pricing and availability, send your requirement through our contact page, or add this burette to the enquiry cart together with the other glassware you need.

Last updated: 24 September 2026