Twaddle Hydrometer, 160 mm, for Liquid Density Measurement

Description

The Twaddle Hydrometer, also known as a Twaddell hydrometer or specific gravity hydrometer, is designed for measuring the density of liquids heavier than water using the traditional Twaddle scale. Manufactured in the United Kingdom by Brannan, these laboratory hydrometers are suitable for industrial applications where Twaddle degrees remain a preferred measurement unit rather than conventional density or specific gravity values. The Twaddle scale is based on specific gravity, where 0° Twaddle corresponds to a specific gravity of 1.000 at 60°F/60°F, approximately equivalent to the specific gravity of water at the reference temperature.

Each 1° Twaddle represents an increase of 0.005 in specific gravity, allowing users to relate traditional Twaddle readings to conventional specific gravity measurements. The range includes five 160 mm hydrometer variations, covering measurements from 0 to 138° Twaddle across separate instruments. Each hydrometer features single-degree scale divisions for convenient laboratory readings. The instruments are adjusted for use at 15.6°C (60°F) with liquids of medium surface tension. Measurements performed at other temperatures may require appropriate corrections.

These hydrometers are useful for analysing compatible chemical solutions, industrial process liquids and laboratory samples where density monitoring is an important part of routine quality control. The compact 160 mm length makes the instruments practical for use with suitable hydrometer jars or measuring cylinders. A longer 300 mm version is also referenced in the manufacturer’s range but is not part of these listed variations. For laboratories requiring documented measurement traceability, Brannan hydrometers can be supplied with UKAS or traceable calibration certificates, subject to availability and selection.

To obtain reliable readings, gently lower the hydrometer into the liquid, allow it to float freely and read the scale according to the prescribed meniscus method. Avoid contact between the instrument and the container walls. Safety Precautions: Handle the hydrometer carefully to prevent breakage. Confirm material compatibility and use appropriate protective equipment when measuring hazardous, corrosive or concentrated chemical solutions. This product is intended for laboratory and educational settings only and should be used under appropriate supervision. Each selected variation is supplied as one Brannan Twaddle Hydrometer, 160 mm, in the chosen measurement range. Hydrometer jars, thermometers, calibration certificates and additional density measurement accessories are not included unless specified separately.

LabChoice Australia supplies Brannan Twaddle Hydrometers and laboratory density measurement equipment for chemistry laboratories, research institutions, industrial quality control facilities, universities and technical laboratories requiring reliable traditional specific gravity measurement instruments.