4 inch pipe CSF-counter



World´s largest wellboat equipped with 4 AquaScan 20 inch pipe CSF-counters.

The 4500mMS Ro Fjell built at Aas Mek. Verksted AS, is owned and operated by Rostein AS.




Our patented measuring principle was developed by company founder and general manager Torbjørn Kvassheim.



It started with his thesis work at the regional university in Stavanger, Norway in 1989. The measuring principle represented a new method of counting where the distance between the objects passing the sensor was no longer relevant. This made it possible to start producing fish counters of high capacity and accuracy, and the company was founded in 1990.



After the original AquaScan C-series smolt counter had become a hit in the early 1990´s, the international market was now demanding a way of fast and accurate counting for fish of different sizes and species. This resulted in the development of the CS-series, specifically designed for counting fish being transported in pipes.


The CS-series became a great success, and in 2000 the CSE-series saw the light of day. Directly based on its predecessor, the CSE-series had a much tougher and service friendly modul-based construction. The CSE-series are still our best sellers, and they have been upgraded several times since the first units.


The CSF-series was also developed in the early 2000´s. They were made for a heavier market, where the need for moving and counting enormous amounts of fish very fast was a key factor. These counters are used in pipesystems where the pipes are completely filled with water. They have two sensor modules, which allows them to see the fish from two different angles.

In the late 2000´s, the CSW-series made its way to the customers. These smolt-counters are somewhat different from the others, as they have no need for a pipe inside. The fish will flow through freely using the full width of the sensor area. This, and state of the art high resolution cameras, makes them very efficient for counting large amounts of smaller fish.