Photo courtesy of Ocean Networks Canada
When instrumentation is deployed in the water in a stationary position for long periods of time, biofouling will occur. This marine growth causes sensor drift, requiring preventative measures be taken to ensure accurate data. To date, the two most common methods to manage biofouling were mechanical wipers and chemical dosing. Neither is ideal, with the first being unsuitable for sensitive lenses and complex geometries, and the second being harmful to the environment.
AML’s biofouling control technology uses ultraviolet light to provide a non-toxic, non-contact solution to prevent marine growth.
Over 480 days in situ: AML’s UV•Xchange preventing fouling on sensors during a technology demonstration at Ocean Network Canada’s Folger Pinnacle Observatory. UV•Xchange modules are installed on the left and middle instruments to protect the sensors. The sensors on the instrument on the right are unprotected, and are heavily fouled as a result.
AML CTDs originally deployed in October of 2013 at Ocean Networks Canada’s Folger Pinnacle site performed for over two years without maintenance. With UV•Xchange, long term monitoring can produce data such as in the graph at left. The timelines of ocean observation and environmental monitoring deployments previously limited to weeks or months due to fouling can now be set in years.