Reynolds Apparatus
Product Code : LSK-TWL-10819
Reynolds Apparatus (SKU LSK-TWL-10819) makes flow regimes visible: a thin stream of dye is injected into water flowing through a glass tube, and its behaviour shows whether the flow is laminar, transitional or turbulent. It is one of the first practicals in fluid mechanics courses for engineering degree and diploma students. Science Lab Supplies manufactures the apparatus in Saha, Ambala, India (Plot 448, HSIIDC Industrial Area) and supplies it direct to institutions, tender contractors and distributors.
Specifications
A borosilicate glass tube with a bell-mouth entrance is connected to a 40-litre constant head tank, with a cock at the outlet to vary flow. Dye flows from a stainless steel vessel through polythene tubing into a copper or stainless steel capillary set centrally in the bell mouth.
| Parameter | Value |
|---|---|
| SKU | LSK-TWL-10819 |
| Test tube | Borosilicate glass, bell-mouth entrance, outlet cock for flow control |
| Capillary tube | Copper or stainless steel, central in the bell mouth |
| Dye vessel | Stainless steel, suitable capacity, fed through polythene tubing |
| Constant head water tank | 40 litres |
| Sump tank | 60 litres |
| Water circulation | FHP pump |
| Flow measurement | Measuring cylinder and electronic stopwatch |
| Control panel | On/off switch, mains indicator |
| Manufacturer | Science Lab Supplies, Saha, Ambala, Haryana |
| Country of origin | India |
Applications and Experiments for the Reynolds Apparatus
The apparatus is used to find the Reynolds number for different flow rates and identify the flow type. At low flow the dye stays as a straight thread; as the cock is opened it wavers and then mixes completely, and the measured discharge gives the Reynolds number at each stage.
- B.Tech/B.E. civil, mechanical and chemical engineering fluid mechanics labs: laminar and turbulent flow.
- Polytechnic diploma practicals: calculating Reynolds number from measured discharge.
- Finding the approximate flow rates at which transition begins in the glass tube.
Keep the constant head steady and let the water settle before each reading, as disturbances in the tank make the dye thread break up early.
Standard Scope of Supply
The set comprises the glass tube with bell mouth and outlet cock, capillary and dye vessel with polythene tubing, 40-litre constant head tank, 60-litre sump tank, FHP pump, control panel, measuring cylinder and electronic stopwatch on a painted structure. Dye is used by the laboratory as required.
Packing, MOQ and Lead Time
Quotations can cover a single Reynolds apparatus or a full set of fluid mechanics lab experiments. Each one gives packing, delivery time and price for the quantity requested, and associated benches can go on the same quotation.
As a registered exporter with an Importer-Exporter Code, Science Lab Supplies can ship to buyers in Vietnam, Malaysia, Peru, Egypt, Iraq and Nigeria. Enquire via the contact page or enquiry cart; see also the lab tender page.
Frequently Asked Questions
What does Reynolds' experiment show?
It shows the change from laminar to turbulent flow in a pipe. The dye thread stays straight in laminar flow and disperses in turbulent flow, and the Reynolds number is calculated for each flow rate.
How is the discharge measured?
Water leaving the outlet is collected in the measuring cylinder and timed with the electronic stopwatch, both included with the apparatus.
Is Science Lab Supplies the manufacturer or a trader?
Science Lab Supplies is the manufacturer. The apparatus is built at its own factory in Saha, Ambala, India, and quotations are sent directly from the factory.
Can it be quoted with other fluid mechanics equipment?
Yes. Send the full list of hydraulics items for your lab or tender through the contact page and they will be priced on one quotation from Science Lab Supplies, an engineering lab equipment maker in India.
Related Fluid Mechanics Apparatus
These four rigs from the same Training Workshop Labs range round out a fluid mechanics lab around Reynolds' experiment, covering energy balance, flotation and flow through coils and beds, and can share its quotation.
- Bernoullis Theorem Complete with Collecting Tank — pressure and velocity heads.
- Metacentric Height Apparatus — stability of floating bodies.
- Flow Through Helical Coil — flow in a curved coil.
- Fluidisation and Fluid Bed Heat Transfer Unit — flow through a particle bed.
Browse the full Training Workshop Labs range or all TVET lab equipment.
Last updated: 25 September 2026
