As ammonia (NH₃) emerges as a promising marine fuel, controlling ammonia slip remains a key challenge. Unburned ammonia in the exhaust poses safety risks for crew, creates environmental impact, and falls under increasingly emission regulations.
MES 1001 Ammonia is an innovative NH₃, NOX CEMS for low-pressure (post turbocharger) installation that continuously monitors and reports NH3 and NOX in real-time. The real-time signals can be used in feedback and or feed-forward control strategies. The fast response time of the analyzer makes it suitable for fast and optimum control of engine and SCR operation.
With ammonia-fuelled engines requiring higher measurement ranges than conventional fuels, the MES 1001 Ammonia delivers a 1000 ppm NH₃ range, ensuring reliable monitoring even under demanding operating conditions.
Based on our patented in-situ CEMS technology, MES 1001 Ammonia offers a future-proof solution that supports the transition to sustainable shipping by delivering precise, fast, and drift-free measurements.

Features and Benefits
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Real-time in-situ measurements unaffected by the adhesive properties of NH₃ known to give slow response times for extractive systems
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Extended NH₃ range up to 1000 ppm for dependable ammonia slip monitoring
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Fast response time for optimal engine and SCR control strategies
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Simple installation — single, compact unit requiring only power, air, and data
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High accuracy and drift-free performance for long-term reliability