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Glass Nessler Tube Cylinder
Original price was: $1.02.$0.39Current price is: $0.39.
Quick answer: A Nessler tube is a tall, graduated glass cylinder used for visual colorimetric comparison of solutions, most commonly to compare colour intensity in water quality testing.
To make a comparison, a test solution and a reference or standard solution are placed in matched Nessler tubes and viewed downward against a white background. Because the tubes are matched for diameter, wall thickness and markings, any visible difference in colour intensity can be attributed to the solutions themselves rather than the glassware, giving a simple and traditional way to estimate concentration by eye.
Nessler tubes are strongly associated with classic colorimetric water testing methods, where a reagent is added to develop colour proportional to the concentration of a substance being tested, but the same principle applies to any procedure requiring a visual comparison of solution colour.
Technical Specifications
| Parameter | Detail |
|---|---|
| Body material | Laboratory glass |
| Design | Tall, graduated cylinder, matched for consistent viewing |
| Function | Visual colorimetric comparison of solutions |
| Typical use | Water quality testing and general colour-comparison procedures |
Applications
- Colorimetric comparison of water samples after reagent addition
- Visual concentration estimation in teaching laboratories
- Comparing colour development between a test and standard solution
- General analytical procedures relying on visual colour matching
Care & Handling
- Use matched tubes together for any single comparison to avoid inconsistent readings
- Clean and rinse tubes thoroughly between different tests to avoid contamination
- View tubes against a plain white background under consistent lighting for fair comparison
- Handle carefully to avoid scratching the glass, which can distort the view
Why Choose LabEquip
LabEquip supplies analytical glassware alongside our wider lab glassware range and chemistry lab equipment to schools, colleges and research laboratories across India. For bulk or institutional requirements, contact us and our team will help confirm the right setup for your testing needs.
Frequently Asked Questions
What is a Nessler tube used for?
It is a tall, graduated glass tube used for visual colorimetric comparison of solutions, most commonly to compare colour intensity when testing water quality or other samples.
How is a colour comparison made using Nessler tubes?
A test solution and a reference or standard solution are viewed downward through matched tubes against a white background, and their colour intensities are compared directly by eye.
Why must Nessler tubes be matched?
Matched tubes have the same glass diameter, wall thickness and markings, which is essential so that any difference observed is due to the solution’s colour and not the tube itself.
What kind of tests commonly use Nessler tubes?
They are traditionally used in colorimetric water testing procedures, such as comparing the colour developed after a chemical reagent has been added to a water sample.
Can Nessler tubes be used for other colorimetric comparisons?
Yes, the same principle can be applied to any procedure where the colour intensity of two or more solutions needs to be compared visually.
Does LabEquip supply Nessler tubes for bulk or institutional orders?
Yes. LabEquip supplies glass Nessler tube cylinders to schools, colleges and laboratories across India, including bulk and institutional orders. Contact us for a quotation.
Last Updated: September 2026
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