Burette with Rota Stopcock - 50ml
Product Code : SCL-CLE-11931
Quick Answer: The Burette with Rota Stopcock – 50ml is a 50 ml borosilicate glass 3.3 burette fitted with a Rota Flow screw-thread PTFE needle valve, graduated in 0.1 ml divisions and calibrated To Deliver at 20 °C.
Last updated: 18 October 2026
Key Features
- Rota Flow PTFE needle valve replaces a glass or plug stopcock and gives fine, drop-by-drop control near the end point.
- Self-lubricating PTFE needle, so no stopcock grease is needed.
- Screw thread sets the flow anywhere from a continuous stream to a very slow drip.
- Stopcock comes apart completely for cleaning, with no special tools.
- Permanent white or blue enamel graduations.
Technical Specifications
| Specification | Value |
|---|---|
| Capacity | 50 ml |
| Material | Borosilicate glass 3.3 |
| Stopcock | Rota Flow screw-thread PTFE needle valve |
| Graduation | 0.1 ml sub-divisions, permanent white or blue enamel |
| Calibration | To Deliver (TD/Ex) at 20 °C |
| Accuracy class | Class AS or Class B |
| Tolerance (Class AS) | ±0.05 ml |
How It Is Used
The burette is used for acid–base, redox and complexometric titrations. The titrant runs out through the needle valve, and turning the screw slows the flow to single drops so the exact end point can be found; the volume used is then read from the 0.1 ml scale.
Frequently Asked Questions
Does the Burette with Rota Stopcock – 50ml need grease?
No. The PTFE needle is self-lubricating, which avoids the grease that can clog a burette tip or react with chemicals.
How accurate is the Burette with Rota Stopcock – 50ml?
In Class AS the tolerance is ±0.05 ml. It is graduated in 0.1 ml sub-divisions and calibrated To Deliver at 20 °C.
Related Chemistry Lab Equipment
See the full chemistry lab equipment range, or these related burettes and titration items:
- Burette with Glass Stopcock – 50ml
- Glass Burette 50ml
- Burettes with PTFE Needle Valve Stopcock
- Burette Clamp
- Conical Flask
Export orders for the Burette with Rota Stopcock - 50ml are accepted from schools, colleges and distributors in Equatorial Guinea, Peru, Cyprus, Timor-Leste and United Arab Emirates.
For a quotation on the Burette with Rota Stopcock - 50ml, contact JLab India on +91-8569909696.