Isodaq Technology is now part of Hydro International.

Open Channel Flow Measurement Options

We offer two alternative types of solution for open-channel flow measurement based on -

•   ISODAQ telemetry logger (RTU) linked to a measurement sensor, or
•   Range of flow meters with integral data loggers, to which an ISODAQ  telemetry logger may be fitted


 

ISODAQ telemetry logger (RTU) solutions for flow meters including level-to-flow conversion (stage-discharge gauges)

The following table is a guide to the selection of the type of flow meters and methods we recommend.  The preferred combination of ISODAQ and sensor type will depend on several factors including the type of site and application:-

Channel type Method Sensor models Isodaq Telemetry
River or irrigation Ultrasonic transit-time Quantum AquaSound  Hawk XT, Hawk RT, Frog R2/R3
River or irrigation Horizontal ADCP Teledyne RDI ADCP Hawk XT, Frog R2/R3
River or stream Natural hydraulic control Thistle, Sutron, Impress, Valeport or Vega Hawk XT, Frog R2/R3
Small channel Vee or Rect. notch weir Thistle, Sutron, Impress, Valeport or Vega Hawk XT, Frog R2/R3, Tadpole
Culvert/part-filled pipe Ultrasonic doppler or Cross Correlation Mace Meters or Nivus Hawk XT

 


 Flow meters with integral data loggers :

•  Weir and flumes via level-to-flow conversion - all our ISODAQ models can be ordered without a telemetry modem fitted.  See Isodaq Data Loggers for more details of our product range
•  Natural rated channels via level-to-flow conversion  - all our ISODAQ models can be ordered without a telemetry modem fitted.  See Isodaq Data Loggers for more details of our product range
•  Transit-time (multi-path) flow meters - Quantum AquaSound
•  Ultrasonic doppler method - Mace Meters
•  Ultrasonic cross correlation method - Nivus
•  Horizontal ADCP - Teledyne RDi with Isodaq Hawk XT or Frog R2/R3
•  Electromagnetic pipe-flow meters - Siemens

We have extensive experience of flow measurement in all types of water environments, and we would be pleased to offer some guidance for budgetary purposes if some specific details of the site and application are provided.  Before selecting the optimum method, we strongly  recommend commissioning a site survey and feasibility study from our flow-measurements specialists at our group company  Hydro-Logic Services (International) Limited; please email your enquiry to flow@hydro-logic.co.uk.