Exhaust gas emissions from the maritime industry being subject to international and national law and regulations, it is fundamental for ship owners to establish compliance with new environmental standards. Being the de facto convention, IMO Marpol Annex VI sets limits for airborne pollution for gas substances contributing to local and global environmental problems.

Our ShipCEMS is designed to monitor your marine exhaust flue, ensuring that compliance with MARPOL Annex VI can be confirmed in ports, in international waters and emission control areas (ECA/SECA). Inspired by environmental concerns, ShipCEMS is designed to measure, analyse and report traces of SO2 and CO2 in wet marine exhaust flue. Monitoring of NOX, O2 or other gases are available as options.

As the flue gases are dirty, with a high content of soot, trace components can easily be lost before arriving at the analyser instrument. Our design solution is based on a heated sample treatment throughout, without needing to introduce chemicals. This assures that the true composition of the exhaust flue is measured

ShipCEMS is designed for unmonitored, continuous operation. The user interface is simple and intuitive, with a limited number of operations necessary to use the system. The analysing technology is based on the use of non-dispersive infrared detectors (NDIR). This is a simple and robust measuring technology, being the industry standard when used in demanding applications.


(Click on image for a larger view)

ShipCEMS can monitor up to four processes simultaneously. One sample probe and one sample conditioning cabinet must be installed for each exhaust stack or combustion process to be monitored. Only one analyser cabinet is required, taking care of the necessary sample stream switching.

→ Download ShipCEMS Datasheet (NA-E-DSH-004-08/January 2016)

→ Download ShipCEMS Utility Specification (NA-E-SPC-009-04/January 2017)

Performance curves for ShipCEMS

Comparing Measuring Technology for ppm SO2

Measurement Variance vs. Moisture Content in Scrubber Flue Gas

Technical specifications

Measuring range
SO2: Default 0-50 ppm Max 0-1000* ppm
CO2: Default 0-10% Max 0-15%*
NOx: on request
O2: on request
CO: on request

Other gases on request

Measuring principles
Industry standard NDIR measuring technology

Calibration gas (span) requirements
40 ppm SO2
8 mol% CO2
Rest N2
Consumption: 5 l/calibration

Air requirements
Lower than +3°C dew point @ 8
barg minimum outlet pressure
(lower than -17°C dew point @
atmospheric pressure)
Oil-free (no oils present in
outlet compressed air)
Consumption: 15 l/min/funnel

Analyser System cabinet
Dimension: 800 x 400 x 1000 mm
Weight: 143 kg

Sample Conditioning System cabinet
Dimension: 400 x 300 x 700 mm
Weight: 52 kg

Heated sample probe
Length: 254 mm
Flange diameter: DN-65 / PN6*
Weight: 10 kg

Cabinets: SS316L
Tubing: PFA/PTFE
Fittings: SS316L
Sample probe counter flange: SS316L (or customer specific)

Ingress protection
IP44 (for indoor installations)
IP55 (for outdoor installations)

Power requirements
230 / 110 VAC

Power consumption
Analyser Cabinet: 590 W
Sample Conditioning System: 490 W
Heated sample probe: 350 W
Heated sample line: 67 W/m

4-20 mA analogue outputs
Digital alarm outputs
Modbus – Option*
Profibus – Option*

Environmental requirements
IEC 60945
IEC 60529

Type Approvals

* Others on request