General Ocean Mechanical Flowmeter.
Can also be used with a plankton net in determining water volume Use
in rivers, estuaries, canals, sewer outfalls, pipes, and harbor
entrances to determine velocity and distance information or use with
plankton nets to determine water volume associated with each tow. Both
models incorporate precision molded rotors coupled directly to six digit
counters which record each rotor revolution. Supplied with a standard
calibration curve (number of counts/unit time vs. velocity) sealed
inside transparent body. A single pin and lanyard system located ahead
of the lateral center of mass allows the flowmeter to maintain correct
dynamic alignment with the fluid flow in which it is immersed.
rotor, nickel-plated brass nose piece, poly-carbonate body, stainless
steel main rotor and idler gear shafts, Delrin idler gears, and Delrin
and nylon digit wheels.
Overall length is 8-3/8" with a 1-9/16" dia. body.
Unlimited (free flooding).
10-digit counter wheels read 000,000 to 999,999; 10 counts per rotor
revolution, non-resetting; read by noting difference in start and end
readings (counter advances through 000,000).
Six-digit full scale count:
999,999 counts equal approximately 14-1/2 nautical miles (1,852 meters/nautical mile).
Universal bridle allows single point connection for towing or two point connection within net mouth.
Response with standard 3" dia. rotor
Threshold approx. 10 cm/sec. (1/5 knot).