Water quality monitoring - uses succession of pictures of fish for comparison with an alarm raised when there is no fish movement

摘要

Where fish are used to mobitor water quality, successive pictures are taken and compared. On no change between images, showing no movement, an alarm is raised. USE/ADVANTAGE - The fish are used to monitor the biological vondition of the water as they rapidly react to contamination and any toxic matter present. The fish remain in a natural environment, and do not have to be held artificially in place for examination, to give a constant monitoring of the water biological quality.