Fuel Costs Optimization Through Accurate Bunkering Measurement

Accurate bunker measurement is critical for marine operators. Fuel represents a significant share of vessel operating expenses, and any uncertainty during bunkering can quickly translate into financial discrepancies, disputes, and weaker cost control.

Danish offshore service company Ziton set out to modernize its bunkering setup, replacing an outdated mechanical flowmeter with a high-accuracy Coriolis mass flow bunker meter and an integrated Bunker Management System (BMS) - a solution now installed on two of its vessels. The goal was straightforward: sharper accuracy, greater transparency, and stronger financial control across every bunker operation.

The Challenge: The Limits of Mechanical Measurement

Ziton's existing mechanical flowmeter measured volume only, and was sensitive to wear, temperature swings, and changing fuel properties. Over time, this eroded confidence in delivered bunker quantities, limited the accuracy of documentation, and reduced transparency during fuel transfer, leaving a growing risk of discrepancies between supplier and vessel.

The meter also lacked advanced diagnostics, making it difficult to verify measurement integrity or catch abnormal process conditions before they became a problem. With fuel costs rising and operational efficiency under closer scrutiny, Ziton needed a solution built to last.

Advanced Insight and Operational Control

The Coriolis technology brings built-in diagnostics that can detect air, (changing temperature), abnormal flow conditions, and measurement disturbances, alongside a viscosity compensation feature that measures the fuel's viscosity directly.

Paired with the proactive Bunker Management System, this turns bunkering from a routine transfer into a fully controlled, fully documented process. Ziton's crew now has complete visibility throughout each bunker operation, boosting operational confidence and reducing the risk of disputes.

The Result: Accuracy, Transparency, and Financial Security

Following the upgrade, Ziton achieved:

• Verified and traceable bunker quantities

• Improved fuel cost control and reduced risk of bunker disputes

• Increased operational transparency, with a solution scalable for fleet-wide rollout

The shift from mechanical to Coriolis mass flow measurement, backed by an integrated Bunker Management System, has meaningfully strengthened Ziton's fuel management strategy.

A Repeatable Marine Upgrade

Many vessels still rely on mechanical or otherwise outdated volumetric bunker meters. Replacing them with modern Coriolis mass flow technology and an integrated Bunker Management System, as Ziton has now done on two of its vessels, is a highly repeatable upgrade path across commercial fleets.

By combining precise measurement with intelligent monitoring, marine operators can protect fuel costs, strengthen documentation, and support long-term operational efficiency.