Burettes Manufacturer,Supplier and Exporter in India

Graduated glass tubes that deliver a measured, variable volume of titrant through a PTFE key stopcock. These Class A burettes are made of heavy-duty borosilicate glass, and their blue scale shows up well against most solutions when reading the meniscus. Four capacities cover small-volume work, routine student titrations and titrations with a large titre: 5, 10, 50 and 100 ml.

Burette specifications and capacities

Setting up and running titrations with the burette

Preparing the burette. Clamp it vertically in a burette stand with clamp and bosshead. Rinse it with distilled water, then with a few millilitres of the titrant, running each rinse out through the tip and throwing it away. Fill through a small glass funnel and take the funnel out before reading, so drips from it cannot change the level.

Acid-base titration. Run titrant into a conical flask holding the pipetted alkali and a few drops of methyl orange. Do one rough run to find roughly where the end point lies. Then do careful runs, adding drop by drop as it approaches, and repeat until two titres agree closely.

Redox titration with permanganate. Fill the burette with potassium permanganate solution and titrate an acidified iron(II) or oxalate solution in the flask. The permanganate acts as its own indicator, and the end point is the first faint pink that stays. The solution is too dark to see the bottom of the meniscus, so read the top edge instead, at both readings.

Frequently Asked Questions About the Burettes

Why rinse the burette with the titrant before filling it?

Water left on the inner wall would dilute the titrant, so more of it would be needed to reach the end point and the titre would come out too high. A small rinse with the titrant itself coats the wall with solution of the right strength. Discard the rinse.

How do you get rid of the air bubble in the tip?

After filling, open the stopcock fully for a moment over a waste beaker so the rush of liquid sweeps the bubble out. Tap the tip gently if one clings. A bubble that escapes during the titration adds its volume to the reading and gives a false titre.

How should a burette be read?

Bring your eye level with the meniscus so you look straight at it, not from above or below. For clear solutions read the bottom of the curve against the blue scale. Holding a white card with a dark band just behind the meniscus makes the edge sharper.

Which burette capacity should a lab choose?

Match the size to the expected titre. The 50 ml size covers most student and routine titrations. Choose 5 ml or 10 ml when only small volumes of titrant are expected, and 100 ml when the titre is large.

Why a PTFE key rather than a glass stopcock?

A PTFE key turns smoothly without grease, so no grease can smear into the tip or contaminate the titrant. It does not seize in the barrel, even with alkaline solutions that can make glass keys stick. Loosen the key slightly when the burette is put away.

What are common mistakes students make with a burette?

Typical errors are a burette that is not vertical, forgetting the initial reading, reading from an angle, and running titrant in too fast near the end point. Others include closing the stopcock too late and subtracting the readings in the wrong order. Clamp it firmly and record every reading straight away.

Burette stands, clamps, brushes and other burettes

• Burette Stand with Clamp & Bosshead
• Burette Clamp, Die Cast – Single Clamp
• Burette Brush
• Micro Burettes, Class-A
• Burette, Class-B, with PTFE Key Stopcock

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Last updated: 14 November 2026