Marine emission monitoring

Marine emission monitoring

As global shipping advances toward a greener future, shipowners face increasingly regulatory emission reduction requirements set by the International Maritime Organization (IMO).

Experience from vessel operations and Port State Control inspections shows that NOx emissions can exceed expected levels, even on TIER III-certified vessels. The challenge is often not the technology itself, but limited visibility into whether SCR and EGR systems continue to perform as intended over time.

Continuous emissions monitoring provides verified, real-time insight into actual performance, helping shipowners demonstrate compliance, maintain accurate documentation, and optimize system operation to ensure sustained efficiency.

Why continuous emission monitoring matters

Continuous NOx measurement technology is mature, reliable, and already available for marine applications. The cost of installing CEMS is modest compared to the investment in NOx abatement systems and insignificant relative to the environmental impact of non-compliance.

Continuous monitoring ensures that emission control systems operate effectively at all times, not just during inspections. This guarantees that vessels consistently meet regulatory requirements while delivering real, long-term environmental benefits.

Trusted technologies for simplified compliance

Danfoss IXA’s In-situ continuous emission monitoring systems (CEMS) provide accurate, real-time measurement of NOx, SO2 and NH3 emissions across all operating conditions. By relying on actual measured data rather than theoretical assumptions, CEMS enables a more accurate and robust approach to compliance. By using measured emissions rather than theoretical load-cycle assumptions, continuous monitoring offers a more accurate and environmentally robust basis for compliance – especially during operation in Emission Control Areas (ECAs).

Gain full emission transparency

See actual emissions of NOx, SO2 and NH3 across all operating conditions, including transient operation and varying loads. Replace assumptions with real-time emissions insights.

Immediate detection of SCR and EGR malfunction

Identify SCR and EGR malfunction or degradation as it occurs, ensuring systems continue to perform as intended.

Simplify compliance documentation

Generate reliable, continuous records of emissions data to support Port State Control inspections. Replace uncertainty with verifiable, high-quality documentation.

Stay within NOx limits

Receive precise, real-time alerts when engine-specific NOx thresholds are exceeded. This enables timely action and reduces the risk of non-compliance during operation.

Trusted solution for scrubber (EGCS) compliance

To reduce air-polluting sulphur emissions, the International Maritime Organization (IMO) introduced a global limit on sulphur content of marine fuels from 1 January 2020. Known as the Global Sulphur Cap 2020, this regulation limits sulphur levels to 0.50% m/m worldwide, with even stricter 0.10% m/m requirements in Emission Control Areas (SECAs).

Scrubber compliance is complex, requiring vessels to continuously demonstrate that sulphur emissions are effectively reduced under all operating conditions in line with IMO regulations.

To verify compliance, accurate monitoring of SO2 and CO2 emissions is essential.

Continuous Emission Monitoring Systems (CEMS) provide real-time data and documented evidence, enabling shipowners and operators to demonstrate compliance while supporting efficient and reliable scrubber performance.

Ready for accurate, real-time emissions compliance?

Reach out to our expert team to find the right CEMS solution for your vessel.