Description

The Zeal Draft Survey Hydrometer D4040 is a precision laboratory-quality glass hydrometer developed specifically for draft survey operations carried out on cargo vessels. During a draft survey, accurately determining the density of the surrounding water is essential for calculating a vessel’s displacement and ultimately determining the weight of cargo loaded or discharged.

Designed in collaboration with S.G.S. Van Bree N.V., Antwerp, a respected name in marine surveying, the D4040 has become a trusted instrument among marine surveyors, shipping companies, inspection agencies and port authorities worldwide.

Its carefully manufactured glass construction, high-visibility graduated scale and excellent measurement resolution allow users to obtain accurate density readings in both fresh water and seawater, helping minimise calculation errors during draft survey operations.

Built for Professional Marine Surveying

Unlike general-purpose hydrometers, the D4040 has been specifically designed for the requirements of commercial shipping and marine cargo inspections. The measuring range of 0.990 to 1.040 kg/L at 15°C covers the densities commonly encountered in harbours, rivers, estuaries and seawater, making it suitable for most draft survey applications.

The fine 0.0005 kg/L graduations enable highly accurate readings, allowing surveyors to perform displacement calculations with greater confidence.

Whether conducting loading, unloading or cargo verification surveys, the D4040 delivers dependable and repeatable results.

Manufactured to Zeal’s Renowned Quality Standards

Zeal has been manufacturing precision hydrometers for well over a century and is recognised worldwide for producing high-quality scientific and industrial measurement instruments.

Every D4040 Draft Survey Hydrometer is individually manufactured to strict quality standards and supplied with a Certificate of Conformity, confirming that the instrument meets its specified manufacturing requirements.

For applications requiring traceable calibration, UKAS or WORKS Calibration Certificates can also be supplied upon request at the time of ordering.

Why Choose the Zeal D4040?
Choosing a genuine Zeal Draft Survey Hydrometer means investing in an instrument trusted by marine professionals around the world. Its precision, reliability and proven performance make it an excellent choice for surveyors who require accurate water density measurements for critical cargo calculations.

Key Applications

• Draft survey of cargo vessels
• Marine cargo inspections
• Load line calculations
• Ship displacement calculations
• Port and harbour operations
• Shipping companies
• Marine survey companies
• Inspection and verification agencies
• Classification societies
• Maritime training institutions

Why Buy From us?

• Genuine Zeal products sourced from authorised suppliers=
• Ready stock available in Singapore
• Competitive pricing for commercial and industrial customers
• Experienced technical sales support
• Fast local delivery
• Optional UKAS and WORKS calibration certificates available
• 90-day warranty
• Trusted supplier of professional measurement instruments

Product Specifications