New February 2021 

Fixed, clamp-on, ultrasonic transit time flow and heat meter

Measure and monitor volumetric flow rate, mass flow rate, energy (heat quantity) flow rate – from one instrument

P/N: 3578010-FLOW
Leadtime: 6-8 weeks

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Fully non-invasive (no drilling required) for measuring the flow rates of most liquids with gas/solid content less than 10% of volume, with 4 – 20 mA outputs and PT100 thermometer integration

Non-invasive (no drilling required) for measuring flow rates of most liquids with gas/solid content less than 10% of volume


Built-in signal oscilloscope for sensor positioning and diagnostics to achieve maximum accuracy with the measurement while providing visibility of the potential issues


Connection to PC available as standard using both RS232 and built-in USB as well as 4 – 20 mA inputs which is available as an optional plug in


All measured values can be totalised giving total flow rate measured during a particular measuring session


Commercial building heat metering, fuel montoring, waste water and many more


Ability to incorporate PT100 thermometer inputs so heat quantity measurement can be monitored alongside flow rate


    Capable of working on pipes DN15 – DN 2500; virtually any clean liquids; on a wide range of pipe materials. Without contact with the fluid, there are also fewer issues with the flowmeter being damaged by the nature of the fluid it is measuring compared to inline flowmeters
    Capable of measuring flow velocities between 0.01 m/s –
    25m/s. Resolution of 0.25mm/s
    Wall mounted and fixed therefore suitable for
    conducting measurements in a wide variety of poor conditions as the equipment is affixed firmly to the wall
    No installation costs such as drilling into pipes, therefore no downtime to the pipe network is present. Only one individual is required to operate the instrument


  • ACCURATE: Accurate to +/- 0.5% under ideal conditions. Repeatability of 0.15% of measured value
    24/7 flow rate monitoring and alert is available
    Sensors rated IP66. Sensor temperature range -20°C to +150°C
    Unique Human Machine Interface (HMI) driven menu emphasises userfriendliness

Datalogging & Communications Ready

  • 16 MB datalogger included as standard – all measurement values can be logged
  • Serial Communications RS232 and USB included as standard, can be used for device control (command line interface) and datalogger download via PC
  • 4 – 20 mA, Digital, Modbus, Relay, OPTO, Open Collector Output available as optional plug-in modules

Optional Plug-in Modules

  • PT100 Thermometer Input (for heat metering applications)
  • 4 – 20 mA Current Input
  • 4 – 20 mA Current Output
  • Digital InputModbus RTU
  • Relay Output
  • OPTO Output
  • Open Collector Output

Part of the Level-Flow-Pressure Range

See the other 3 products in this range:

  • Portatank – handheld ultrasonic tank liquid level indicator
  • Portasonic 2.FL0 – handheld clamp-on ultrasonic flow meter
  • Portasonic CALCULATOR – convert flow rate into pressure

level-flow-pressure final News Pieces Images (7)

Get in touch to solve your flow and heat monitoring now

  • use the enquiry form at the top of the page
  • download the free brochure
  • go on our live webchat  
  • further contact details on the Contact Us page:


1 x Main Unit 

RS232 and USB communications included

DC power supply included

Any additional plug-in modules that are selected

1 x Pair of Standard Transducers for pipes DN15 – DN700 (set of 2)

1 x Pair of Jubilee Clips for your pipe sizes (set of 2)

1 x Measuring Tape

1 x Ultrasonic Couplant

1 x User Manual

1 x Installation Manual


215mm (L) x 185mm (W) x 100mm (D)



Pipe Diameter Range

DN15 – DN 2500 (1/2 inch – 98 inches), please enquire for larger pipes

Liquid Types

Most clean liquids with gas/solids less than 10% volume

Flow Velocity

0.01m/s – 25 m/s


0.25 mm/s


0.15% of measured value

Turn Down Ratio

  • 1/100

Measurement Rate

1 Hz as standard

Measurement Units

  • Flow Velocity, Volumetric Flow Rate, Mass Flow Rate, Energy Flow Rate (Heat Quantity), Volume, Mass, Energy – also suitable for heat metering applications


Full 240 x 160 pixel graphics with backlight

Power Supply

12V – 36V DC configurations at 10W, DC PSU supplied as standard (AC options are available, please enquire)

Additional Features

Signal oscilloscope for sensor positing and diagnostics

Operating Temperature

Main Unit: -10°C to +65°C

Sensors: -20°C to +150° C

IP Rating

Main Unit: IP 65 enclosure

Sensors: IP 66

Sensor Dimensions

Standard Model No. DM10: 40mm (L) x 20mm (W) x 25mm (D)

Large Model No. DS10: 60mm (L) x 30mm (W) x 35mm (D)

Sensor Material

Housing: Stainless Steel

Front Face: PEEK (Polyetheretherketone)

Cable Lengths

3.0m as standard (additional lengths available upon request)


Main Unit: 3 years

Sensor: 1 year

Lifetime customer support


CE, Coltraco is ISO 9001:2015 and ISO 14001 approved
Thank you for your interest in Permaflow® Simply enter your name and email for your free instant brochure download.