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Closed Channel Flow Monitoring

Magnetic, ultrasonic and contacting meters that measure flow in full pipes.

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At a glance

  • MagneticNo moving parts, for conductive liquids
  • UltrasonicTransit time for clean liquids, Doppler for solids
  • Pressure and contactingDifferential pressure, capacitance, TDR and paddle wheel
  • Supply to calibrationSelection, installation, audits and hire

Measuring flow in a full pipe comes down to the right technology for the liquid, the pipe and the job.

The options include magnetic and ultrasonic meters, pressure transmitters, and contacting types such as capacitance, TDR (time domain reflectometry) and paddle wheel.

We’ve supplied, installed and calibrated all of them, and we’re glad to talk through which one suits your job.

A pair of ultrasonic transducers strapped to a green pipe, cabled to a wall-mounted flow transmitter with a keypad and display
Clamp-on ultrasonic transducers measure flow from outside the pipe, with no cut into the line and nothing in the flow.

The technologies

MagneticMeasures the voltage a conductive liquid creates as it moves through a magnetic field. Nothing blocks the flow and there are no moving parts, but the liquid must be conductive.
Ultrasonic transit timeTimes sound pulses with and against the flow. Suits clean liquids, and comes inline, as an insertion meter or clamped to the outside of the pipe.
Ultrasonic DopplerBounces sound off particles and bubbles in the liquid, so it suits wastewater, slurries and other liquids with solids.
Pressure transmittersInfer flow from the differential pressure across a restriction, and measure level and head.
Contacting technologiesCapacitance and TDR sensors measure level, and paddle wheels measure velocity directly. Simple and economical where conditions suit.

Choosing a meter

These are the questions that decide it.

  • The liquid: its conductivity, and the solids and bubbles it carries
  • The pipe: material, diameter, lining and condition
  • The straight run of pipe available upstream and downstream of the meter
  • Whether the line can be cut, or the meter must clamp on or be hot tapped
  • The accuracy required, whether for billing, compliance or operations
  • Power, communications, and the systems the readings must reach

How EDS helps

  • Selection and supply

    Advice on what suits the job, and supply from one of Australia’s largest ranges of monitoring instruments.

  • Installation and commissioning

    Installed and commissioned by EDS technicians, and connected to your SCADA or telemetry.

  • Audit and calibration

    On-site audits and calibration of meters already in service.

  • Hire

    Short- and long-term hire for temporary measurement.

Talk to the people who measure it.

Tell us about your network, site or project. A real person from our team will come back to you.

Start an enquiry 1300 721 683