DRB Series Paddle-Wheel Flow Meter

Brand: KOBOLD Instruments, Inc

The KOBOLD DRB paddle-wheel flow meter can measure the flow of liquids in pipes up to 3 inches in diameter with pressures up to 250 PSIG.

It uses a PVDF paddle that’s designed to slightly protrude into the flow stream, enabling the flow meter to measure fluids with some small solids content, as well as dirty liquids, with a much lower risk of failure.

The paddle, supported on a sapphire bearing system, is durable, has an extended life span and provides excellent chemical resistance. The DRB is available with stainless steel or brass threaded bodies.

A Hall-effect sensor detects the passing of permanent magnets embedded in the paddle-wheel blades.

The sensor’s output is then transformed to a linear pulse frequency output or 4-20 mA signal.

Optional displays and controllers are available to provide analog outputs, local flow rate indication, and programmable setpoint switches.
  • Brass or Stainless Steel Bodies
  • Low Pressure Loss
  • Pulse Frequency, 4-20 mA or Switch Output
  • Optional Digital Flowrate Indicators, Rate-Totalizing Display, or Batching Electronics


Measuring Range

  • 1.5-8 GPM to 15-200 GPM


  • 1/2” to 3” NPT Thread

Body Material

  • Brass
  • Stainless Steel

Maximum Pressure

  • 250 psig

Maximum Temperature

  • 176° F


  • ± 3 % Full Scale


  • Pulse Frequency
  • 4-20 mA Analog
  • Digital Display
  • Switches

Media Category

  • Liquid


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