The Riverwatcher will be installed in fish ladders, bypasses or other suitable bottlenecks in the water body. The base model of the Riverwatcher consists of two vertical aligned arrays of IR light barriers. When a fish is passing the scanner, its silhouette and swimming direction will be registered. Based on the silhouette the size of the fish can be determined.

 

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Additionally, the Riverwatcher can be equipped with a camera and a light source. Both will be delivered as a combined system with visual and IR light. Depending on location and time both spectral ranges can be changed. The IR band is especially suitable for the use at night or for the census of photophobic species.

 

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RW technische Zeichnung