• Ostwald Viscometer or U-tube viscometer is a chemical instrument that is used to measure the viscosity of a liquid with a known density.
• This viscometer is named after the German chemist, Wilhelm Oswald.
• This viscometer is a U-tube with two bulbs separated by a capillary tube.
• The two bulbs act as reservoirs for the liquid.
• The small reservoir is located at a higher level than the larger reservoir.
• There are two marks at the top and the bottom of the small bulb.

• Used for demonstrating the decomposition of water, determination of chemical composition by electrolysis and with applications in the evaluation of the electrochemical equivalent of hydrogen.
• The glass unit has two connected limbs, each of approximately 50ml capacity (graduated 2 – 50ml), integral reservoir tube and funnel-shaped bulb, with a stopcock at the top of each limb.
• Supplied with electrodes, 2 carbon and 2 platinum. Requires 12V power supply.
• The apparatus should be set up vertically using a clamp and stand to hold it safely.
• Connect the terminals to a DC power source. Matches will be required to test for gases.
• Chemicals required: Water, molar sodium, or potassium sulphate or sulphuric acid.
• Supplied in neat, well-protected packing case. 

Usage Guide:

• Thistle Funnels are used to add liquids to a narrow necked flask or other container.
• They are usually passed through a bung or clamped in place.
• They are particularly useful if the liquid addition must be low down in the flask where a funnel or dropping funnel would have too short a stem.

• Manufactured according to BS.701.
• Made in borosilicate glass

• Gas Sampling Tubes are used for collecting and transporting a know volume of gas for testing or analysis.
• They have a stopcock at each end to allow for a flow of gas into the body.

• Has open tubular arm
• Suitable for use when small quantity of dyes or powders are to be weighed