Ostwald Viscometer

Product Code : SCL-LG-11984

Ostwald Viscometer (SKU SCL-LG-11984) is a U-shaped glass capillary instrument for comparing the viscosity of liquids by timing how long a liquid takes to flow between two marked levels under gravity. Chemistry and physics teachers, B.Sc. and B.Pharm practical classes and research laboratories use it for relative viscosity work. As a laboratory glassware supplier in India, Science Lab Supplies dispatches it from Ambala to schools, colleges, universities, tender contractors and distributors.

Specifications

The viscometer is formed from transparent laboratory glass as a U-shaped capillary tube with two marked levels, between which the falling meniscus is timed. It is operated entirely by hand, by filling, gentle suction and a stopwatch, with no electronic controls, so students can watch the liquid pass through the capillary.

Applications and Experiments for the Ostwald Viscometer

The instrument is used wherever students or analysts compare how readily two liquids flow. Flow times for a sample and a reference liquid such as water, taken at the same temperature, give the relative viscosity once both densities are known. It suits physical chemistry, properties-of-matter and pharmaceutics practicals.

• B.Sc. physical chemistry: relative viscosity of a liquid with respect to water.
• B.Sc. practicals: how the viscosity of a solution changes with concentration.
• Class 11 physics, mechanical properties of fluids: demonstrating viscosity.
• B.Pharm physical pharmaceutics: flow-time measurements on Newtonian liquids.

Standard Scope of Supply

Each order line covers one Ostwald Viscometer. A stand or clamp, suction device, thermometer, stopwatch and reference liquid are not included, so plan these from existing laboratory stock or ask for any of them to be listed as separate lines on the same quotation.

Packing, MOQ and Lead Time

Quotations can cover a single viscometer for a research bench or enough pieces for a whole practical batch. Every quotation lists the packing, delivery time and price for the quantity you name, and other chemistry lab equipment in India, such as pipettes or density bottles, can join the same enquiry.

Holding an Importer-Exporter Code as a registered exporter, Science Lab Supplies can ship to buyers in Sri Lanka, Vietnam, Malaysia, Peru, Egypt and Iraq. Science Lab Supplies is registered for GST (GSTIN 06ADEPJ0574F2ZU). To begin, write through the contact page, collect items in the enquiry cart, or use the lab tender page for institutional purchases.

Frequently Asked Questions

What is an Ostwald viscometer used for?
It compares the viscosity of liquids by timing a liquid's flow through a capillary between two marks under gravity. The sample's flow time is compared with that of a reference liquid to work out relative viscosity.

Does the viscometer come with a stand or thermometer?
No. The supply is the viscometer alone. A stand, suction device, thermometer, stopwatch and reference liquid have to be arranged separately or added as extra lines on the quotation.

Why must the temperature stay constant during a test?
Viscosity changes noticeably with temperature, so the sample and the reference liquid must be timed at the same steady temperature, usually with the viscometer held in a water bath.

Who supplies the Ostwald Viscometer?
The viscometer is supplied by Science Lab Supplies from Ambala, India. Colleges, research laboratories, tender contractors and distributors can order it alone or with other glassware from the same range on one quotation.

Related Physical Chemistry Glassware

Viscosity practicals rarely stand alone: the calculation needs liquid densities, and many courses pair viscosity with surface tension in the same session. These four items cover density, surface tension, accurate liquid transfer and sample handling, so a complete physical chemistry bench can be quoted together.

• Specific Gravity Bottle — finds the liquid densities needed for relative viscosity.
• Stalagmometer — drop-count glassware for the companion surface tension experiment.
• Volumetric Pipette 5ml — delivers a fixed volume of liquid into the viscometer.
• Borosilicate Beaker — holds samples and reference liquids at the bench.

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Last updated: 25 September 2026