Lloyd's Register (LR) has issued a Factual Statement confirming that Daphne Technology's PureMetrics™ continuous emissions monitoring system has been assessed and found suitable for the direct monitoring of selected greenhouse gas emissions from marine diesel engines onboard ships.
The Factual Statement was formally presented during Gastech 2026 in Bangkok.
The assessment, based on reviewed documentation and onboard demonstration testing, includes an LR Design Appraisal of the PureMetrics™ system and its emissions calculation methodology. Unlike vessel-specific approvals, the appraisal applies to the system's generic design, providing shipowners and operators with a technical basis to support future ship-specific applications and certification processes.
The appraisal confirmed that PureMetrics™ is designed to monitor carbon dioxide (CO₂) and methane, alongside carbon monoxide (CO), nitrogen oxides (NO and NO₂) and sulphur dioxide (SO₂). The system is intended for use on marine diesel and dual-fuel engines.
LR carried out the assessment against relevant IMO, EU MRV and NOx Technical Code documents. The Factual Statement also references IMO Resolution MEPC.416(84), the first dedicated IMO guidelines covering continuous emissions monitoring systems (CEMS) for marine diesel engines, adopted at IMO MEPC 84th session in 2026.
The appraisal is particularly relevant as emissions monitoring requirements continue to evolve. In addition to CO₂, the assessment covers methane measurement, which is now included within EU MRV reporting requirements and is fully incorporated into the EU Emissions Trading System from 2026.
Max Wu, Lead Specialist, Engine and Emissions Certification Services at LR, said: “Accurate emissions measurement is becoming increasingly important for shipowners and operators. Our assessment confirms that PureMetrics™ has a sound technical basis for directly monitoring and quantifying emissions from marine engines. The Design appraisal and Factual Statement provide independent validation of the system's design and methodology, giving the industry greater confidence in the quality and consistency of the emissions data it handles.”
Ivan Raleff, Managing Director of Daphne Technology SA, Switzerland, said: “Receiving the Lloyd’s Register Factual Statement and presenting it to shipowners and operators at Gastech 2026 marks another step in the independent validation of PureMetrics™ as a credible basis for direct emissions reporting. The appraisal confirms that the system’s design and methodology meet applicable requirements across a wider scope of greenhouse gases.”
