Danfoss IXA Emission Sensor Technology
NOx, SO2 and NH3 sensor, MES 1001 is developed for the maritime industry, and its harsh maritime environment. The sensor measures NOx, SO2 and NH3 gases directly in the exhaust uptake, which makes it capable of sending data updates every second. Fast and accurate measurement of emission gases is vital in meeting environmental legislation, and enables optimum use of after-treatment technologies such as Selective Catalytic Reduction (SCR).
The sensor is self-calibrating, and is consequently easy operate, and maintain. Installation is easy, and requires only pressurized air, data cable and power.
The sensor offers a variety of interfaces, including Modbus/TCP-IP, Analog Out (4-20 mA) and RS-485 for GPS data.
Quick and easy installation
NOx, SO2 and NH3 sensor, MES 1001 has an installation time on approimately one hour, when the pre-installation work has been carried our. The sensor is mounted on a standard flange, which is welded on to the exhaust system. Standard 24VDC power from the vessel is connected to the sensor, a data cable and compressed air, and the sensor is up running.
Easy operation
The MES 1001 is designed for easy operation. The technical crew on board a vessel has many jobs to see to. However, MES 1001 is not one of them, as it practically operates on its own. There is no need for connecting bottles with reference or span gases, as the sensor automatically self-calibrates. The sensor has a variety of connection possibilities and can be operated by the display or remote service tool. This consequently offers a favorable cost of ownership, as there is no need for special crew training.
Danfoss IXA Emission Sensor Technology
The sensor is based ultra violet absorption spectroscopy. This means that ultraviolet light is emitted into the gas and a detector (spectrometer) measures the amount of light absorbed by the gas. The sensor’s computer contains a digital library with the “fingerprints” of the supported gasses and by comparing the what we “see” with the reference library, the exact concentration can be calculated. The emission of ultraviolet light takes place in the probe.
The probe contains a complex mechanical design which together with the flow of clean compressed air ensures that the delicate optical components is not contaminated by e.g. soot particles. The same air system is also responsible for dragging the exhaust past the measurement point inside the probe. The sensor offers a unique “zeroing” scheme which uses the compressed air to evacuate the probe from exhaust gas and this means drifting parameters practically can be eliminated.
The sensor measures the gasses NOx, SO2 and NH3 at the same time, and the measurements are reported on one or more of sensor’s outputs. The outputs can either be Modbus TCP/IP or analogue.
Simple maintenance
The MES1001 sensors are designed for minimum maintenance and automatically suggest preventive maintenance on the sensor. Danfoss IXA is able to set up notifications as per wishes for notifying about e.g. annually timely consideration and delivery of spare parts to go on board vessel. No special training or service technicians required. Replacement and installation of all planned maintenance and consumables can be performed easily by crew.
