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Burette, PTFE Key
Self-Lubricating PTFE Stopcock: Features a precision-machined Polytetrafluoroethylene (PTFE) key that facilitates smooth, grease-free operation, eliminating the risk of lubricant-induced sample contamination and ensuring maintenance-free performance in acidic or alkaline environments.
Linear Borosilicate 3.3 Column: Manufactured with a low coefficient of expansion (3.3 x 10-6 K-1), utilizing a uniform internal bore and fire-fused enamel graduations to maintain Class AS or B volumetric tolerances during intensive analytical procedures.
$2.64
Quick answer: This Burette has a PTFE stopcock key, which is self-lubricating and resists seizing, giving reliable performance without needing stopcock grease during titration. Burette, PTFE Key is priced at approximately ₹234 (indicative market benchmark, incl. GST, August 2026).
A burette is a long, graduated glass tube used to deliver a precisely measured, variable volume of liquid reagent during a titration. This version uses a PTFE stopcock key rather than a glass key, which is naturally low-friction and self-lubricating, reducing the risk of the stopcock seizing over time and avoiding potential sample contamination from stopcock grease. Because this listing’s exact mechanism (turn-style versus screw-thread) has not been independently confirmed, and STEMAids separately lists a Rotaflow (screw-thread PTFE) burette, please confirm with STEMAids how this version differs before ordering. Made from borosilicate 3.3 glass, it’s a standard instrument for titration in college and research analytical chemistry laboratories.
Technical Specifications
| Parameter | Detail |
|---|---|
| Product Type | Burette, PTFE key (stopcock) |
| Function | Grease-free delivery of liquid reagent during titration |
| Stopcock Type | PTFE (self-lubricating) |
| Construction | Borosilicate 3.3 glass |
| Exact mechanism vs. STEMAids’ Rotaflow burette / capacity | Not independently verified for this listing — confirm with STEMAids before ordering |
| Price | Approx. ₹234 (indicative market benchmark, incl. GST, August 2026) |
| Exact dimensions/technical detail | Not independently verified for this listing — confirm with STEMAids before specifying in a tender |
Applications
- Acid-base and other titrations requiring grease-free operation
- Analytical chemistry practicals avoiding stopcock grease contamination
- College and research chemistry laboratory volumetric analysis
- General-purpose controlled liquid dispensing
Care & Maintenance
- No stopcock grease is needed for the PTFE key — avoid applying grease unnecessarily
- Clean thoroughly after each use to prevent residue from affecting future readings
- Store upright, ideally on a burette stand, to protect the graduated tube
Why Choose STEMAids
STEMAids supplies a wide range of Chemistry Lab Equipments including Economy Calorimeter for related laboratory and classroom needs. Eduscope Smart Learning Solutions Private Limited is a Udyam-registered micro manufacturing enterprise (UDYAM-DL-06-0069460) and ISO 9001:2015 certified, supplying schools, colleges and vocational institutes across India and for export.
Frequently Asked Questions
What is a PTFE key burette used for?
It’s used for titration, using a self-lubricating PTFE stopcock that resists seizing and avoids the need for stopcock grease.
How is this different from STEMAids’ Rotaflow burette?
Both use PTFE stopcocks; the exact mechanism difference has not been independently verified for this listing — confirm with STEMAids which specific configuration each SKU represents before ordering.
What capacity does this burette hold?
The exact capacity has not been independently verified for this listing — confirm with STEMAids before ordering.
Is this suitable for a college chemistry teaching lab?
Yes — burettes of this kind are standard equipment for titration practicals in analytical chemistry coursework.
Does STEMAids supply matching burette stands and clamps?
Contact STEMAids to confirm compatible support equipment for a complete titration setup.
Is STEMAids a registered manufacturer of this product?
Yes. Eduscope Smart Learning Solutions Private Limited is a Udyam-registered micro manufacturing enterprise (UDYAM-DL-06-0069460) and is ISO 9001:2015 certified. See the About page for full registration and certification details — manufacturer-stated, verify before citing in procurement documents.
Last updated: 29 August 2026.
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