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Micronics Portaflow 300

The Portaflow 300 brings a new simplicity to the non-invasive measurement of liquid flow. This clamp-on ultrasonic instrument offers the user quick and accurate flow measurement from outside the pipe.

Micronics engineers have utilised their 15 years experience of developing portable flow measuring instruments to design a compact rugged and reliable unit. The instrument gives a digital readout of velocity or volumetric flow rate and total integrated flow in either imperial or metric units. Output include an RS232, 4-20mA and pulse that allow the user more versatility when collecting application data.

The Portaflow 300 is supplied in a waterproof carrying case which houses the electronics, transducer assemblies and all mounting hardware suitable for most flow applications. A separate carrying case is used when transducer set "D" is included within the kit of parts supplied.

The instrument is able to work on a wide variety of pipe sizes from 13mm up to 5000mm, simply by selecting the correct transducers and attaching them to the outside of the pipewall using the hardware provided.

Operation is push button easy such that the user is only required to know the pipe dimensions and the type of pipe wall material. All other application parameters can be measured by the instrument itself.


The Portaflow 300 is a Transit Time ultrasonic flow meter that has been designed to work with clamp-on transducers, thus enabling liquid flowing within a closed pipe to be measured accurately, without the need for any mechanical parts to be inserted through the pipe wall or to protrude into the flow system. When ultrasound is transmitted between transducers X and Y, the speed at which the sound travels through the liquid is accelerated slightly by the velocity of the liquid through the pipe.

When ultrasound is transmitted in the opposite direction, the flow of the liquid causes the transmitted sound to decelerate. The subsequent time difference is directly proportional to the flow velocity in the pipe. Having measured the flow velocity and knowing the pipe cross-sectional area, the volumetric flow can be easily calculated. Micronics engineers have developed a measurement technique which has the ability to resolve extremely small time differences down to 25 pico seconds (25x10-12 seconds), thus giving extremely good performance on small pipes or in large pipes with low velocity flows.


The Portaflow 300 electronics are housed in an IP66 enclosure which incorporates the graphic display, keypad, sensor and output facility connections. The Microprocessor driven electronics makes the instrument respond quickly to any instructions given. Programming the unit is carried out by selecting the options displayed in the main menu and by following the simple instructions given. Flow readings can then be achieved on most applications within a few minutes.

The use of rechargeable batteries allows the unit to be operated for a period in excess of 24 hours depending on the facilities used. Continuous operation via the PSU is possible while also recharging the battery pack. The graphic display provides flow data in large highly visible characters which can be enhanced by the use of the back light facility, making it possible to read the flow rate from a distance of 5-10 metres away under extremely poor lighting conditions. Error messages, battery status, signal strength, application temperature, time and date are all continuously displayed, as well as flow information in either numerical or graph format, keeping the user fully aware of the measurement process.

Languages are available as an option, in English, French or German. They can be supplied on disc to be downloaded via the RS232 or already programmed into the instrument.


The Portaflow 300 is able to work with four different transducer sets, depending on the application. High temperature sensors are now supplied as standard. The instrument is supplied with transducer sets 'A' and 'B' as standard. Transducer sets 'C' and 'D' are available as options to increase the velocity and pipe range of the instrument. 'D' transducers will only work up to +80°C and are supplied and are supplied seperately with webbing straps. Chains are used to secure the guide rails to the pipe. Magnetic assemblies are available for the 'B' guide rail only.

Data Sheet

Please note - Product designs and specifications are subject to change without notice. The user is responsible for determining the suitability of this product.

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