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General Oceanics Inc.
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Electronic Flowmeters

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Electronic flowmeters use magnets to actuate a solid-state hall-effect generator, creating a signal for processing by the 2135 Readout or 2135D - Direct Reading Software or can be used as a mechanical counter. Model 2031H is a standard Electronic Flowmeter. Model 2031HR6 uses a high resolution rotor for low-speed operations.

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Small and lightweight general purpose impeller instruments for use in open channel applications including, rivers, estuaries, canals, sewage outfalls, pipes, harbour entrances, offshore sites and in association with plankton nets and other samplers. These flowmeters have been used also as towed speed logs by some America`s Cup contenders. Corrosion-free operation. Ballasted for dynamic in situ stability. Unlimited depth capability.

Standard order of Model 2031 H series electronic flowmeter includes rotor, universal bridle and pigtail (short length of cable and underwater connectorfor connection to readout cable). Order readout (Model 2135 or 2135D) additionally.

Technical data subject to change without notice.

  • Weight in Air: 225grams (8 ounces).
  • Weight in Water: 113grams (4 ounces).
  • Materials: Celconrotor. Nickel-plated brass nose cone. Polycorbonate body. Armaloyed stainless steel main rotor and idler gear shafts.
  • Dimensions: 21.3 cm (8 3/8") overall length, Standard rotor diameter: 6.98 cm (2 3/4"). Low-speed rotor diameter: 16.5cm (6 1/2").
  • Depth Rating: Unlimited (free flooding)
  • With switch-cable assembly (3-conductor cable. Hall-effect generator. (Male, 3-pin connector RMG-3-MP).
  • Data Readout: Six 1O-digit counter wheels reading 000000 to 999999. Ten counts per rotor revolution, non-resetting. Read by noting difference in beginning and end readings. (Counter advances through 000000).
  • 6-Digit Full-Scale Counter: 999999 counts equals approximately 14.5 nautical miles.
  • Mounting: Universal bridle allowing single-point connection for towing or two-point connection within net mouth.
  • Threshold: Approximately 10 cm/sec (1/5 knot).
  • Range: Approximately 10 cm/sec (1/5 knot) to 7.9 meters/sec (15 knots).
  • Threshold: Approximately 6 cm/sec (3/25 knot).
  • Range: Approximately 6 cm/sec (3/25 knot) to 100 cm/ sec(approximately 2 knots).
  • Switch Cable Assembly:3 conductor cable, Hall-effect generator, male 3-pin connector RMG-3-MP