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Marine Emissions

Emissions from seagoing ships include air pollutants, greenhouse gases and ozone-depleting substances entailing risks for human health and the environment.

Worldwide, NOx emissions from shipping (international and domestic) have been estimated at about 25 million tons in 2007, equivalent to about 30 per cent of total global anthropogenic emissions (MEPC, 2009).

Sulphur dioxide (SO2) and nitrogen oxide (NOx) emissions from ships are responsible for acid deposition, which can be harmful to the environment, as well as particulate matter harmful to health. NOx and volatile organic compound (VOC) emissions contribute to the formation of ground-level ozone harmful to health and to the environment. NOx emissions contribute to environmentally damaging eutrophication. Carbon dioxide (CO2) emissions contribute to climate change. Halon emissions damage the ozone layer.

Improved environmental performance and reduced operational cost is at the top of every shipping company's priorities. Climate change and rapid rises in the cost of fuel have increased the focus on energy consumption and efficiency, throughout the maritime industry.

The solution that we offer with 350-Maritime gives you the opportunity to link combustion  optimization, increasing fuel savings & profitability,  with conformity to MARPOL 73/78 Annex VI.

Model 350-Maritime is a Portable Emission Analyzer with Germanischer Lloyd (GL) Type Approval for compliance with MARPOL 73/78 Annex VI, NOx Technical Code and MEPC.103(49), which gives you quickly and  efficiently highest accuracy reliable emission measurements that ensure the precise values of  O2, CO, NOx, SOx, CO2, flue gas temperature, ambient temperature, pressure, calculated fuel moisture content, and combustion efficiency, allowing optimum adjustment, data storage/export/printing and thus eliminating guesswork.


accurately measuring all your emissions with a type approved portable analyser in a few minutes instead of estimating them

If you are interested in having a portable emissions measurement & analysis system that


  • has marine type approval for NOx measurements according to MARPOL 73/78 Annex VI and CO2
  • has marine type approval for SOx measurements
  • is user friendly and can be used by the crew without specialised training
  • can give you results within 10-15 minutes
  • can also be used for the diesel generator
  • will let you know if the ship is complying with MARPOL
  • can utilize combustion efficiency measurements for fuel savings
  • can utilize measurements for CO2 savings & possible CO2 trading

then get in touch with us!!

Fast and easy measurements for compliance with MARPOL Annex VI and NOx Technical Code 

Model 350-Maritime is the only portable MARPOL emissions analyzer with Type Approval

The 350-Maritime is a portable emissions analyser  fitted with: O2, CO, CO2-(IR),SO2, NO and NO2, gas preparation, integrated rechargeable battery pack and measuring data memory.

The flue gas sampling is operated via a specially designed gas sampling probe, which can easily be mounted with the help of a flange. The type approved and hard-wearing electro-chemical gas sensors (ECS) record the concentrations of the flue gas components O2, CO, SO2 and NOx (NO + NO2 separately) highly accurate and longterm stable. CO2 is recorded via a type approved IR-measuring principle. To cope with the rough requirements at sea the entire emission analyzer including accessories is stored in a robust protection case.

The complete kit:- Emission Analyzer  350-MARITIME fitted with: O2, CO, CO2-(IR), SO2, NO and NO2, gas preparation, integrated rechargeable battery pack and measuring data memory Control-Unit 350-MARITIME

  • Connection cable (5,4m) between analyzer and Control Unit
  • Flue gas sampling probe with probe shaft prefilter
  • Mounting flange for gas sampling probe
  • Robust protection case with trolley function
  • Cable with battery clamps and adapter for connection to  350-MARITIME
  • Germanischer Lloyd (GL)-certificate nr. 59 488 - 08 HH


The applications for 350-MARITIME at a glance

On Board verification survey subject to NOx Technical code

The 350-MARITIME can be utilized to measure gaseous emission components such as O2, CO, CO2, NOx and SO2 as one system component for the following operations:

Periodical surveys and intermediate surveys

  • onboard Direct Measurement and Monitoring method
  • onboard simplified measurement method ie when any modification or adjustment has been done on an engine

Inspection of NOx limit values stipulated in MARPOL Annex VI

  • for NOx control measurements onboard

NOx measurement as verification in regions with local or national legislation
ie proof of NOx reduction measures subject to the NOx Tax in Norway

Inspection of SO2 limit values to meet the  Sulphur Emission Control Areas (SECA) requirements.

  • for SO2 control measurements onboard

Additional measurement parameters such as O2, CO, CO2 and SO2 in one instrument

  • Verification of CO2 reduction & trend monitoring
  • Turbocharger oxygen sufficiency monitoring
  • Scrubber performance verification
  • Combustion efficiency monitoring

350-MARITIME Technical data 


Parameter Measuring Range Accuracy
°C flue gas -40 up to 1000°C max. ±5 K
O2 0 … 25 Vol% Subject to MARPOL
Annex VI respective NOx Technical Code
CO 0 … 3000 ppm Subject to MARPOL
Annex VI respective NOx Technical Code
NO 0 … 3000 ppm Subject to MARPOL
Annex VI respective NOx Technical Code
NO2 0 … 500 ppm Subject to MARPOL
Annex VI respective NOx Technical Code
SO2 0 … 3000 ppm Subject to MARPOL
Annex VI respective NOx Technical Code
CO2 (IR) 0 … 40 Vol% Subject to MARPOL
Annex VI respective NOx Technical Code
pabs 600 … 1150 hPa ±5 hPa at 22 °C
±10 hPa at –5°C up to 45°C
 Storage temperature  -10°C up to 50°C
 Operation temperature  5°C up to 50°C
 Power supply  11 … 40 V DC or
110 ... 230 V AC 50/60 Hz
 Buffer battery  NiMH 8,4V/4,5Ah
 Electrical power consumption  max. 40 W
 Max. positive pressure / flue gas  50 hPa
 Max. negative pressure / flue gas   -200 hPa
 Weight (system including case)  appr. 17 kg
 Dimensions (case) 56,5 x 45,5 x 26,5 cm

Set includes-Analyzer box 350-MARITIME fitted with: O2, CO, CO2-(IR), NO, NO2 and SO2, incl.gas preparation, differential pressure sensor, 2 temperature probe inputs,connection data-bus, fresh air valve for long-term measurement, integrated battery, integrated combustion air probe (NTC), trigger input, measurement datastore, USB interface-Control-Unit 350-MARITIME V2-Robust protection case with trolley function (without protective cap in the bottom) - Exhaust gas probe for industrial engines with probe pre-filter, 335mm immersion deptη incl. cone and heatshield, Tmax 1000°C, special hose for NO2- / SO2 measurements, length 5.2m, incl. thermocouple for exhaust gas temperature measurement (NiCr-Ni, length 400mm, Tmax. +1000°C) with 5.4m connection line and additional temperature protection - Connection cable between Control Unit and analyzerbox, length 5m, fast printer with wireless infrared interface, 1 roll of thermal paper and 4 mignon batteries for printing readings out on site - Humidity / temperature instrument  610 - Silicon connection hose (Ø4mm, length 5m) incl. hose connector to exhaust gas probe to measure back pressure in the measurement- Germanischer Lloyd (GL)-certificate