Burettes Class B
Product Code : EL-GB-10141
Quick answer: This is a Class B tolerance borosilicate glass burette fitted with a PTFE needle-valve stopcock and amber-printed graduations, suited to routine titration work and to titrants that need protection from light.
Burettes Class B — Specification
| Feature | Detail |
|---|---|
| Material | Borosilicate Glass |
| Tolerance Class | Class B |
| Stopcock Type | PTFE needle-valve stopcock |
| Graduation Colour | Amber-printed |
Why Choose a PTFE Needle-Valve Stopcock and Amber Graduations
A PTFE needle-valve stopcock does not need grease and is resistant to most laboratory reagents, which is why it is a common alternative to a glass key stopcock on routine-use burettes such as the Burette Class B With PTFE Key Stopcock.
Amber-printed graduations improve the visibility of the printed scale and are a traditional choice on burettes used for titrations involving light-sensitive reagents, such as iodometric titrations. Buyers who need a glass-stopcock version instead can see the Burette Class B With Glass Stopcock.
Frequently Asked Questions
What tolerance class is this burette?
It is manufactured to Class B tolerance, the standard grade used for routine teaching and laboratory titration work.
What type of stopcock does it use?
It is fitted with a PTFE needle-valve stopcock, which does not need grease and resists most common laboratory reagents.
Why are the graduations printed in amber?
Amber-printed graduations are a traditional choice for improving scale visibility and are commonly used on burettes for titrations involving light-sensitive reagents.
Is a glass-stopcock version available instead?
Yes, the Burette Class B With Glass Stopcock uses the same Class B tolerance with a glass key stopcock instead of a PTFE needle valve.
Does a PTFE needle-valve stopcock need maintenance?
It does not need periodic greasing the way a glass key stopcock does, though it should still be checked periodically for smooth operation and reagent compatibility.
Related Products
Burette Class B With Glass Stopcock, Burette Class B With PTFE Key Stopcock, Burettes With Schellbach Stripe
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Last updated: September 2026.