Marine Draft Survey Hydrometer, for Seawater Density Measurement

Description

The Marine Draft Survey Hydrometer, also known as a marine density hydrometer, ship draft survey hydrometer or seawater density hydrometer, is designed for accurately measuring the apparent density of seawater during marine draft surveys and cargo weight calculations. Manufactured in the United Kingdom as part of the Brannan special-purpose hydrometer range, this instrument provides a practical measurement solution for marine surveyors, shipping professionals, port operations and maritime testing laboratories. The hydrometer features a measurement range of 0.990–1.040 kg/L, covering the density range required for many marine draft survey applications.

During a ship draft survey, seawater density is measured to support calculations of vessel displacement and the weight of cargo loaded or discharged. Accurate density readings are essential because variations in water density influence the relationship between vessel draft, displaced water volume and displacement mass. The instrument features 0.0005 kg/L scale divisions and a listed measurement accuracy of 0.0005 kg/L, allowing detailed readings during marine density assessments. With an overall length of 320 mm, a bulb diameter of approximately 26 mm and a weight of approximately 67 g, the hydrometer is designed for practical use with a suitably sized hydrometer jar or measuring cylinder.

The instrument is adjusted for use at 15°C. Measurements taken at other temperatures should be interpreted using the applicable marine draft survey procedures and appropriate corrections where required. This model is supplied with a traceable calibration certificate, providing documented measurement traceability for professional testing and marine surveying applications. To obtain reliable measurements, collect a representative seawater sample, transfer it into a suitable clean container and gently lower the hydrometer into the liquid. Allow the instrument to float freely without touching the container walls or bottom before taking the scale reading.

Safety Precautions: Handle the glass hydrometer carefully to prevent breakage. Avoid impact, sudden temperature changes and unsuitable sample containers. Follow established marine sampling and laboratory procedures. This product is intended for professional marine surveying, laboratory testing and educational applications requiring apparent density measurement. The product is supplied as the selected Marine Draft Survey Hydrometer with Traceable Calibration Certificate. Hydrometer jar, sampling bottle, thermometer and additional marine testing accessories are not included unless specified separately.

LabChoice Australia supplies Brannan Marine Draft Survey Hydrometers and precision density measurement instruments for marine surveyors, shipping companies, port authorities, maritime training facilities, research laboratories and industrial testing organisations.