-4H-Self-cleaning Monitoring Box Revolutionize the thermosalinograph data quality on ships! Operating principle: The combination of two Self-cleaning Monitoring Boxes (-4H-SMB) measuring continuously physical parameters of surface water leads to high efficiency and accuracy of data. The boxed flowthrough sensor system works in master-slave mode with one substituting the other during automated cleaning cycles. This redundant system ensures steady measurements without any disturbances of biofouling and it additionally gives the opportunity for continuous high quality management for accurately validated data. The cyclone-shaped bin for sensors also facilitates an effective automatic cleaning. Because of its compact construction transporting and handling of the 4HSMB is very easy. Equipped with commonly used interfaces the -4H-SMB enables communication with every (research) vessel. Parameter with cleaning solution container Sound velocity 1375 … 1625 m/ s Turbidity Chlorophyll 0.013 NTU (sensitivity) 0.025 µg Chl-a/l (sensitivity) First system installed onboard R/V Elisabeth Mann Borgese, Leibniz Institute for Baltic Sea Research Warnemünde, Germany A joint development of Leibniz-Institut für Ostseeforschung Warnemünde Seestrasse 15 │ 18119 Rostock (Germany) Phone: +49 (0) 381 5197-0 │ Fax: +49 (0) 381 5197 -440 Web : www.io-warnemuende.de -4H- JENA engineering GmbH