The objective of the EnviGuard project is to develop a highly specific and precise (i.e. quantitative and qualitative) in situ measurement device for currently hard to measure man-made chemical contaminants and biohazards (toxic microalgae, viruses & bacteria, biotoxins & PCBs) that can be used as an early warning system in aquaculture and as an environmental monitor to assess the good environmental status of the sea in compliance with the MSFD. It will be more cost-efficient than current monitoring devices leading to a clear marketing advantage for the European analytical and research equipment industry. The modular system will consist of three different sensor modules (microalgae/pathogens/ toxins & chemicals) integrated into a single, portable device, which saves, displays and sends the collected data real time to a server by means of mobile data transmission and the internet. EnviGuard will be able to accomplish this also in real-time for a period of at least one week without maintenance in an offshore, marine surrounding. User of EnviGuard can access their data online any time they need to. Potential fields of use are marine environment pollution monitoring, marine research and quality control in seawater aquaculture, a sector in Europe highly occupied by SMEs. The biosensors developed in the project go far beyond the current state-of-the art in terms of accuracy, reliability and simplicity in operation by combining innovations in nanotechnology and molecular science leading to the development cutting edge sensor technology putting European research and highly innovative SMEs in the forefront of quickly developing markets.