Digital Flow Meter with back-run stop

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.

Flow meter Recommended for vertical pull
Rotor Polyamide, PA 6.6 Nylon rotor
Nose cone POM Plastic
Body POM plastic
Gear shaft Stainless steel main rotor
Overall length 19,0 cm
Standard rotor diameter 7,5 cm
Other data
Depth rating Unlimited (free flooding)
Data read out Five ten-digit counter wheels reading 00000 to 99999. One count per rotor revolution
Counter 99999 counts, equal approx. 16,2 nautical miles. The counter cannot be reset. If you need to reset the counter you must use 23.090.
Mounting Universal bridle allowing 3 point connection
Threshold 20 cm/sec
Range 20 cm/sec to 8,0 meter/sec


Source: KC Denmark A/S