Emission Control & Monitoring System Suppliers

Buying emission control hardware is one of the biggest single capital decisions a shipowner faces today. The choice between a scrubber and a switch to compliant fuel, between SCR for Tier III ports and engine derating, or between continuous monitoring sensors and periodic sampling shapes operating costs for the rest of the vessel's life. Each path comes with its own equipment scope, its own approval folder, and its own paperwork burden.

RecordsMarine has assembled a directory of emission control and monitoring system suppliers so naval architects, fleet planners, and yard project teams can review options side by side instead of working through dozens of brochures.

How the Equipment Breaks Down

Emission gear falls into two camps — control hardware that removes pollutants, and monitoring hardware that proves the readings:

• Open-loop scrubbers — wash exhaust with seawater
• Closed-loop scrubbers — recirculate fresh water with caustic dosing
• Hybrid scrubbers — switch between modes by zone
• Selective Catalytic Reduction (SCR) — cuts NOx with urea injection
• Exhaust Gas Recirculation (EGR) — feeds exhaust back into the engine
• Methane slip catchers — for LNG dual-fuel engines
• Carbon capture pilots — onboard CO2 removal
• NOx, SOx, and CO2 continuous emission monitoring systems (CEMS)
• Washwater monitoring units — pH, turbidity, PAH sensors
• Data loggers for EU MRV and IMO DCS reporting

Suppliers of emission control and monitoring systems issue a full list at the quote stage, since consumables, sensors, and software costs add up across the 10-year service life.

Where Each Solution Fits

Different vessel types match different control strategies:

• VLCCs and large bulk carriers — scrubbers for HSFO economics
• Tier III newbuilds — SCR or EGR mandatory in ECAs
• LNG carriers and dual-fuel ships — methane slip control
• Cruise ships in EU ports — hybrid scrubbers and strict CEMS
• Short-sea ferries — battery hybrid plus low-sulfur fuel
• DP-class offshore vessels — SCR aftertreatment with monitoring

Established providers of emission control and monitoring systems run the payback analysis on each option.

Brand Landscape

The market is split between dedicated marine emission specialists and bigger engineering groups:

• Alfa Laval (PureSOx, PureNOx)
• Wärtsilä Exhaust Treatment
• Yara Marine Technologies
• Hitachi Zosen Inova
• Mitsubishi Heavy Industries
• MAN Energy Solutions
• DuPont Clean Technologies
• ECOSPEC Global
• Green Instruments (sensors and monitoring)
• Martek Marine (CEMS)

Each name has its own technology focus. Alfa Laval and Wärtsilä lead on integrated scrubber and SCR packages, while Green Instruments and Martek dominate the sensor and monitoring side.

Points to Pin Down at Tender Stage

A short list that helps to choose a suitable emission control and monitoring system supplier:

• Required removal efficiency (sulfur, NOx, particulate)
• Footprint and weight limits in the engine room or funnel
• Bunkering plan — HSFO with scrubber vs VLSFO direct
• Type approval for the relevant flag state
• Class society notation requirements
• Sensor calibration intervals and consumable costs
• Software integration with the ship's reporting platform
• Cyber security under IACS UR E22
• Training scope for engineers and ETOs
• Spare parts coverage over the vessel's life

Total cost of ownership over 10 years often tells a clearer story than the headline equipment price.

Standards and Approvals

Emission equipment must meet MARPOL Annex VI on SOx and NOx, IMO MEPC.184 on washwater discharge, IMO 2020 sulfur rules, IMO Tier III NOx limits in ECAs, EU MRV regulation 2015/757, EU ETS pricing rules, ISO 8178 on exhaust testing, IEC 62388 on marine sensors, and class society notations such as Clean, Tier III, and Green Passport. CEMS units also fall under IEC 61508 for functional safety.

Frequently Asked Questions

How long does a scrubber take to install?

Open-loop scrubbers fit in 4 to 6 weeks of dry dock time. Hybrid systems can stretch to 8 to 10 weeks.

Can SCR be retrofitted to an existing engine?

Yes, for most engines after a minor exhaust modification. Tier III certification requires factory testing of the combined engine and SCR package.

Are washwater discharge limits the same worldwide?

No. Some ports (Singapore, Belgium, parts of China) ban open-loop discharge entirely. Hybrid scrubbers handle these zones by switching modes.

Find Emission Control and Monitoring System Supplier Near You

The directory below brings together makers and authorized agents covering shipyards, retrofit teams, and fleet operators across major maritime regions. Run through the listings, request quotations, and shortlist a partner that fits you.