23.091 - Flow meter with back-run stop:

For determining the amount of water passing through a plankton net or a pipe.

The back-run stop is recommended for a vertical tow of the plankton net. When lowering the net, the flow meter does not count; it will only count when the net is drawn back through the water column.  For a horizontal pull you can also use flow meter 23.090.

Diameter of propeller/counter body: 70/32 mm, length 185 mm, 5-digit counter; easy installation by a triple point connection of the nosepiece.

The construction is based on a free flooding design, so it can be used for full (unlimited) oceanographic depth.

The flow meter read-out (max. value 99999) vs. water volume can be calculated using our spreadsheet allowing a quick and intuitive conversion regardless if the shape is circular, square or rectangular. Find the spreadsheet here.