Area Velocity Module

Area Velocity – no weir or flume needed! Handles submerged, surcharged, and reverse flow.

The sensor on the 750 module uses patented Doppler technology to directly measure average velocity in the flow stream. An integral pressure transducer measures liquid depth to determine flow area. The 6712 sampler then calculates the flow rate by multiplying the area of the flow stream by its average velocity.

The 750 gives you greater accuracy in applications where weirs or flumes are not practical, or where submerged, full pipe, surcharged and reverse flow conditions may occur. With area velocity, you don’t have to estimate the slope and roughness of the channel. And Teledyne ISCO’s exclusive 500 kHz Doppler penetrates farther into deep flow streams than 1 MHz systems, whose shorter wavelength can cause them to give “nearsighted” velocity measurement in typical wastewater applications. The Doppler system continuously profiles the flow stream, eliminating profiling and calibration required by electromagnetic systems.


Standard Features

  • Sealed Area-Velocity sensor resists fouling by oil and grease. Streamlined shape sheds debris.
  • Choice of standard (10 ft) and extended (30 ft) level measurement range.
  • During the program’s operation, flow, velocity, and level values are viewable on the sampler’s LCD display.
  • Level and velocity data stored in the sampler are available for later retrieval, reporting, and graphing using Teledyne ISCO Flowlink® software.


  • Accurate open channel flow measurement without a weir or flume
  • Pretreatment Compliance
  • Stormwater Runoff Monitoring
  • Permit Enforcement
  • Sewer Flow Monitoring
  • Combined Sewer Overflow Studies
  • Inflow and Infiltration Studies
  • River and Stream Gauging