The Deckma Hamburg GmbH is the world's leading supplier of IMO-certified 15ppm bilge alarms. With over 65,000 devices built, we have been enabling the shipping industry to make an important contribution to environmental protection for over 40 years. Our product range also includes a wide range of instruments for oil in water, water turbidity, particle size or the analysis of microplastics in water. Our measuring instruments work with optical measuring methods, continuously and without consumables. They do not produce any waste during operation. We develop and produce our instruments in Germany with high reliability and robust construction.