Ostwald Viscometer

Product Code : SCL-LG-11984

The Ostwald Viscometer is a glass capillary instrument used for comparing the viscosity of suitable liquids by measuring gravity-driven flow time between two marked points. It is intended for chemistry and physics teaching laboratories, colleges, universities, and research settings that require a practical method for studying liquid viscosity.

Product Description

The Ostwald Viscometer uses a U-shaped capillary arrangement. A liquid sample is drawn above the upper timing mark and then allowed to flow through the narrow capillary under gravity. The measured flow time can be compared with that of a reference liquid using the calculation method appropriate to the experiment.

Its transparent laboratory-glass form allows users to observe the meniscus and record passage time between marked levels. Buyers can also explore the laboratory glassware range. Exact capacity, glass grade, capillary size, calibration status, tolerance, and supplied accessories should be confirmed before ordering.

Key Features

• Capillary flow measurement: Supports timed comparison of liquid flow through a narrow capillary.
• Clear observation: The transparent body helps users track the meniscus between timing marks.
• Teaching value: Demonstrates viscosity, fluid resistance, gravity-driven flow, and comparative measurement.
• Simple manual operation: Uses filling, suction, timing, and calculation rather than electronic controls.
• Bench-top format: Suitable for practical work and supervised demonstrations.
• Honest specification control: Unverified capacity, calibration, tolerance, and certification data are not assumed.

Technical Specifications

What's Included in the Kit

• 1 × Ostwald Viscometer.
• Any stand, suction accessory, thermometer, stopwatch, reference liquid, or other component is not included unless separately confirmed.

Applications / Uses

• Comparing the viscosity of suitable Newtonian liquids under controlled conditions.
• Teaching the relationship between capillary flow time and liquid viscosity.
• Practical work in physical chemistry and properties of matter.
• Student exercises involving flow time and comparative calculations.
• Experiments complementing other properties of matter apparatus.

How to Use the Ostwald Viscometer

1. Clean and dry the viscometer according to the laboratory procedure.
2. Add the required amount of test liquid for the selected model.
3. Keep the viscometer vertical and maintain a stable test temperature.
4. Draw the liquid above the upper timing mark using controlled suction.
5. Allow it to flow freely and record the time taken for the meniscus to pass between the two marks.
6. Repeat as required and calculate viscosity only with the correct equation and test data.

Safety note: Handle glassware carefully, avoid excessive suction, use suitable personal protective equipment, and follow the laboratory's chemical-handling procedure.

Care & Maintenance

• Rinse promptly using a cleaning method compatible with the sample and glassware.
• Prevent residue, dust, or air bubbles from obstructing the capillary.
• Store where the glass cannot be struck or bent.
• Do not use chipped, cracked, or damaged glassware.

Why Choose Science Lab Supplies

Science Lab Supplies states that its history in laboratory and scientific equipment dates to 1986. The company manufactures and exports educational, scientific, and laboratory equipment for schools, colleges, universities, research institutions, and other institutional users. Its portfolio includes laboratory glassware, scientific instruments, and elasticity and surface tension equipment. Product-specific capacity, material grade, calibration, and certification should be verified against the final quotation or technical sheet.

Frequently Asked Questions

What is an Ostwald Viscometer used for?

An Ostwald Viscometer is used to compare or determine liquid viscosity by measuring flow time through a capillary between two marked points under gravity.

How does an Ostwald Viscometer work?

The sample is drawn above an upper mark and allowed to flow through the capillary. The flow time between two marks is recorded for the applicable calculation.

What material is the Ostwald Viscometer made from?

It is a laboratory-glass capillary instrument. The exact glass type or grade should be confirmed before ordering.

Can an Ostwald Viscometer be used in colleges and universities?

Yes. It is suitable for supervised chemistry and physics practical work involving viscosity and capillary flow.

Does the Ostwald Viscometer require calibration?

For absolute or kinematic viscosity calculations, confirm whether the selected instrument is calibrated and whether a viscometer constant is supplied.

What temperature should be used for viscosity measurement?

Use the temperature required by the applicable laboratory method because viscosity changes with temperature. Keep the sample temperature stable during comparative measurements.

For related measurement instruments, explore the analytical laboratory equipment range from Science Lab Supplies.