Viscosity Apparatus Stokes Method
Product Code : LSK-EAST-11179
Viscosity Apparatus Stokes Method (SKU LSK-EAST-11179) is a falling-ball viscometer: steel balls are dropped through a liquid in a tall borosilicate glass tube and timed between two marks, giving the coefficient of viscosity by Stokes' law. It is used in Class 11 physics, B.Sc. and engineering physics labs. Science Lab Supplies turns out the apparatus at its factory on Plot 448, HSIIDC Industrial Area, Saha, Ambala, India, and sells it on a direct basis to schools, colleges, tender contractors and distributors.
Specifications
Every stated detail of the Stokes viscosity apparatus is set out row by row below. In outline, a one-metre borosilicate glass tube stands vertically between two upright bars on a heavy cast iron base, closed below by a solid rubber cork and topped by a cork with a funnel, with six steel balls supplied.
| Specification | Value |
|---|---|
| SKU | LSK-EAST-11179 |
| Method | Stokes' falling-ball method |
| Tube material | Borosilicate glass |
| Tube length | About 1 m |
| Tube ends | Both ends open |
| Lower closure | Rubber cork without holes |
| Upper closure | Rubber cork with funnel |
| Tube support | Held vertically between two upright bars with clamps |
| Base | Heavy cast iron |
| Index marks | 2 rubber bands |
| Test balls | 6 steel balls of different diameters |
| Lead shot | Not included |
| Manufacturer | Science Lab Supplies, Saha, Ambala, Haryana |
| Country of origin | India |
Applications and Experiments for the Stokes Method Viscosity Apparatus
The apparatus measures the viscosity of a clear, thick liquid such as glycerine from the terminal velocity of falling steel balls. With six ball sizes, students can check that terminal velocity varies with the square of the radius, a core Class 11 and B.Sc. fluid-properties practical.
- Class 11 physics: coefficient of viscosity by Stokes' method, timing each fall between the rubber-band marks with a Digital Stopwatch.
- Measuring each ball diameter with a Vernier Caliper before plotting terminal velocity against radius squared.
- B.Sc. practical: effect of temperature on viscosity, with the liquid temperature read on Laboratory Thermometers.
- Engineering physics: terminal velocity and drag on a sphere.
Standard Scope of Supply
The supply comprises the borosilicate glass tube with its two rubber corks (one plain, one carrying a funnel), the two upright bars and clamps on the heavy cast iron base, two rubber-band index marks and six steel balls. Lead shot is not included, and the test liquid is the buyer's own.
Packing, MOQ and Lead Time
A quotation can be raised for a single Stokes apparatus or for one per bench in a practical hall. Science Lab Supplies lists packing, delivery time and price for whatever quantity you specify, and stopwatches or calipers for timing and sizing the balls can go on the same quotation.
Registered with an Importer-Exporter Code, Science Lab Supplies is able to ship to buyers in Ethiopia, Tanzania, Uganda, the UAE, Saudi Arabia and Oman. To start, describe your requirement on the contact page or save the item in the enquiry cart; the lab tender page explains tender participation.
Frequently Asked Questions
Which liquids can be tested?
The method suits transparent liquids thick enough for a ball to reach a steady speed well within the one-metre tube, such as glycerine or castor oil, so that its fall can be watched and timed between the marks.
Why are six balls of different sizes supplied?
Stokes' law predicts that terminal velocity rises with the square of the ball radius. Timing six different diameters lets students test that relationship and average the viscosity from several results.
What are the rubber-band index marks for?
They slide along the outside of the tube to mark the start and end of the timed distance, set low enough that each ball has reached a steady speed before the first mark.
Is Science Lab Supplies the manufacturer or a trader?
It manufactures the apparatus. The tube stand, base and fittings are produced at the Science Lab Supplies factory in Saha, Ambala, India, and buyers receive their quotation from the manufacturer directly.
Related Viscosity and Liquid Apparatus
These viscosity, surface tension and liquid-measurement items cover the remaining fluid-property practicals next to the falling-ball method, from rotating-cylinder viscosity to capillary and expansion work, and any of them can be added to the same quotation for this apparatus.
- Viscometer Searle's Pattern — graduated inner cylinder whose slot is protected by a transparent cover.
- Viscosity and Particle Drag — self-standing falling-sphere unit with two glass tubes and a valve for recovering spheres.
- Quincke's Surface Tension Apparatus — sensitive spirit level for setting the plate horizontal.
- Jaeger's Surface Tension Apparatus — dropping funnel fitted in one hole of a two-hole cork.
- Rising Table with Capillary Tube Clamp — adjustable stand carrying a capillary tube clamp.
- Expansion of Liquid Apparatus — five graduated capillary tubes of equal bore with bulbs, in a metal trough.
- Measuring Cylinder Glass — listed in capacities from 10 mL to 500 mL.
Browse the full Elasticity and Surface Tension range, the Fluid Mechanics range for flow and drag apparatus, or all physics lab equipment.
Last updated: 9 October 2026