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Open Channel Flow Meter

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Product Description




MJK - Denmark


The Flow Converter 713 is designed for measuring and recording water flow in open ducts and channels.

The Flow Converter 713 is a complete instrument for the measuring of instantaneous flow and recording of accumulated water flow. It can be adapted to any type of weir or flume.


  • Built-in ISO 1438 flow formulas
  • Flow-proportional control of sampler
  • Adapts to any kind of weir or flume
  • Built-in stormflow function
  • Supplied with either ultrasonic or hydrostatic sensor
  • Maximum accuracy with measuring ranges down to 0-10 cm
  • Flow Converter 713 is calibrated from the front panel
  • Easy to operate with setup information in English or other user-specified language
  • Security access code can be programmed
  • Built-in totalizer with counter
  • Indication of average flow (m3/hour) actual, the last hour, today, the last 24 hours
  • Indication of accumulated flow (m3) actual, the last hour, today, the last day
  • If 713 is set as an emergency stormflow meter, the number of stormflows, stormflow time and volume and start and stop time for the last stormflow are counted
  • Alarm can be set for high and low flow, and excess of 1- and 24-hour volumes


The sensor of the Flow Converter provides a signal proportional to the level. 
The amplifier linearizes the signal from the sensor so it is proportional with the flow rate.

The Flow Converter 713 can calculate flow on the basis of one of the three following principles:

  • Preprogrammed formulas for different dimensions of the most common flumes and weirs such as Parshall, Venturi and Palmer Bouwlus flumes and retangular or V-notch weirs based on ISO 1438.
  • When using non-standard flumes or weirs the existing calculation formula can be programmed.
  • For flumes where no calculation formula exists, a number of known Level-flow values can be entered, on the basis of these a point-linearization is made.


Open channel flow meter 713 has 5 output relays which can be configured for PLC and SCADA Interface. The relay function can be set to:

  • External Totalizers counter
  • Control of sampler
  • High flow rate
  • Low flow rate
  • Max. flow / hour
  • Min. flow / hour
  • Max flow /day
  • Min flow / day
  • Sensor error
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