General Oceanics Mechanical Flow Meter, High Speed
Product Code: 203001
MPN: 2030R
These compact, mechanical flow meters are designed for measuring flow in lakes, rivers, canals, estuaries, sewage outfalls, and offshore applications. They are ideal for determining water speed, volume, or distance. These general-purpose flow 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). The counter is located within the body of the instrument and is displayed through the clear plastic housing. Flow meters are properly balanced so they maintain a horizontal position when suspended by a towing line. After completing each sampling, simply remove the meter and record the reading and time. By subtracting the first reading from the second, the average speed over a given sampling time can be calculated. Each flow meter measures 8-3/8″ long, 1-9/16″ in diameter and includes 18″ of tow line and a stainless steel connecting axle pin. High-speed impeller measures from 10 cm/sec. to 790 cm/sec. and Low-speed from 6 to 100 cm/sec.
- High-speed impeller accurately measures water velocities from 0.10 to 7.9 m/s, making it suitable for most freshwater and marine sampling applications.
- Mechanical six-digit odometer-style counter records rotor revolutions without batteries or external power.
- Balanced free-flooding design maintains stable orientation during towing while providing unlimited operating depth.
- Corrosion-resistant construction with a polycarbonate body, nickel-plated brass nose cone, stainless-steel shaft, and molded Celcon rotor ensures long service life in freshwater and seawater.
- Universal bridle mount allows installation on plankton nets or use as a towed current meter.
- Each instrument is supplied with an individual calibration factor for converting rotor counts into water velocity, towing distance, or filtered water volume.
Specifications:
| Feature | Specification |
|---|---|
| Manufacturer | General Oceanics® |
| Model | 2030R |
| Product Type | Mechanical flowmeter with high-speed impeller |
| Flow Range | 0.10–7.9 m/s (10–790 cm/s; approximately 0.2–15 knots) |
| Starting Threshold | Approximately 10 cm/s (0.2 knots) |
| Counter | Six-digit mechanical counter (000000–999999) |
| Rotor | Three-blade high-speed Celcon® impeller |
| Body Material | Clear polycarbonate |
| Nose Cone | Nickel-plated brass |
| Shaft Material | Armaloy® coated stainless steel |
| Weight in Water | Approximately 113 g (4 oz) |
| Dimensions | 21.3 cm (8.38 in) long; 6.98 cm (2.75 in) rotor diameter |
| Depth Rating | Unlimited (free-flooding design) |
| Mounting | Universal towing bridle for single-point towing or two-point plankton net mounting |
| Country of Manufacture | USA |
