Danfoss IXA emission sensor technology is developed specifically for the maritime industry and its demanding operating conditions. The MES 1001 sensor measures NOx, SO₂ and NH₃ directly in the exhaust uptake, allowing for continuous data updates every second. Fast and accurate measurement of emission gases is essential for meeting environmental regulations and enables optimal use of after-treatment systems such as Selective Catalytic Reduction (SCR).
Quick and easy installation
The sensor is self-calibrating, making it simple to operate and maintain. Installation is straightforward and requires only pressurized air, a data connection, and power. The system supports multiple communication interfaces, including Modbus TCP/IP, analog output (4–20 mA), and RS-485 for GPS data, allowing easy integration into existing vessel systems.
Installation can typically be completed in about one hour once pre-installation work is done. The sensor is mounted on a standard flange welded onto the exhaust system. With a standard 24VDC power supply, compressed air, and a data cable connected, the sensor is ready for operation.
Easy operation
The MES 1001 is designed to operate with minimal crew involvement. It runs largely independently, eliminating the need for manual calibration using reference or span gases. The sensor can be accessed via a local display or remote service tools, and its ease of use reduces the need for specialized training. This contributes to a lower total cost of ownership over the lifetime of the system. More information about the technology and its applications can be found through Danfoss IXA emission monitoring solutions.
The measurement principle is based on ultraviolet absorption spectroscopy. Ultraviolet light is emitted into the gas, and a spectrometer measures how much light is absorbed. The system compares these readings with a digital reference library of gas “fingerprints” to calculate exact concentrations. This process takes place within the probe, ensuring accurate, real-time results.
The probe is designed to perform reliably in harsh environments. A continuous flow of clean compressed air protects the optical components from contamination such as soot particles and ensures stable operation. The same air system draws exhaust gas through the measurement point and enables a built-in zeroing function, which removes exhaust gases from the probe to minimize drift and maintain long-term accuracy.
The sensor measures NOx, SO₂ and NH₃ simultaneously, with results available through digital or analog outputs. This allows the data to be used for monitoring, control, and reporting across onboard systems.
Simple maintenance
Maintenance requirements are kept to a minimum. The MES 1001 can automatically indicate when preventive maintenance is needed, and notifications can be configured to support planning and spare part delivery. Routine maintenance and component replacement can be carried out by the vessel crew without the need for specialized technicians, further reducing operational costs.
