In the last decade TAXON has developed several systems for continuous monitoring (SIMOC). These tools are tailored to the specific needs and environmental authorizations for each client. Currently the industry in which it is applied is mainly desalination, but can be adapted to the needs of each particular industrial activity. The SIMOC are based on a network of underwater sensors, with measure points located on benthic communities to be protected. The data recorded by the instruments are received in a data server. The server automates the statistics and graphs reports, allow a remote query, and triggers an alert on any situation outside the limits set. All developments are based on different systems and tools of free software (GNU / Linux, Perl, PHP, mySQL, Apache, R, ...).