Specification
The new open channel Multi Electrode Fish counter has been designed to remove a lot of the problems that a standard 3 electrode resistivity fish counter possesses.
The main problem with the 3 electrode resistivity counters are:
- the restricted fish size range that it possesses
- the tendency to create lots of events, due to wind, waves, ice, entrapped air in weed, etc.
- false upstream counts caused by waterlogged logs and canoes
The new Multi Electrode Fish Counter detects fish as small as 80mm in length up to and above 1.2 metres in length, and to a resolution of 10mm. This system can also count smolts as they drop through the counters multi electrode array.
Some other important features provided for each fish event include:
The true length of the fish, (it is not influenced by the bulk of the fish)
Its swim speed past the multi electrode counting array in metres per second, to a resolution of 0.01 metres per second.
The body mass value of the fish, from a value from 20 up to 200, and to a resolution of 1.
The date and time of the fish passage, and its direction of travel.
It will count and size two fish, if they are separated by as little as 10mm.
It is designed to ignore things like canoes, ice, entrapped air in weed, sunken logs, and wind and waves. (Not even an event record is produced).
It also does not suffer from changes in conductivity or rises in river level.