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These compact, mechanical velocity meters are designed for measuring water flow in lakes, rivers and more. Determine water speed, volume or distance.
The meters incorporate a precision-molded rotor coupled directly to a six-digit counter that registers each revolution of the rotor and displays it similar to an odometer (up to 999,999—equal to approximately 14.5 nautical miles). Properly balanced to maintain a horizontal position when suspended by a towing line.
After completing each sampling, simply remove the meter and record the reading and time. Subtract the first reading from the second to calculate average speed over a given time. Each flow meter measures 83/8" long, 19/16" in diameter and includes 18" of tow line and a stainless steel connecting axle pin. The high-speed meter measures from 10 cm/sec to 7.9 m/sec. The low-speed meter measures from 2 to 100 cm/sec. Ship weight 2 lbs.