Portable Flowmeters 

The Portalok 7S Clamp on ultrasonic flow meter

Reliable and Extremely Easy to use

Standard Flow Meter Features

  • Transit Time ultrasonic Propagation technology with Doppler Assist
  • Waterproof System Design
  • Excellent tool for Flow Survey Companies
  • High Signal Strength even in difficult applications
  • Available as a purchase or rental item
  • Complete Flow Survey Package off the shelf
  • Improved Signal to Noise Ratio
  • Volumetric Flow Measurements in Metric or Imperial Units
  • Flow Totalizer

More about the Flow Meter


Sonalok 7S Stationary Mains Powered Ultrasonic Flow Meter


Standard Flow Meter Features

  • 110/240 VAC or 9/36 VDC
  • Wall Mount Die Cast Aluminium Enclosure (Optional Stainless Steel)
    Standard Analog and Digital Outputs
    Options Include
    • Additional Inputs/Outputs
    • Modbus
    • Hart
    • Math Functions (Thermal Energy Program)

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EESIFLO 8000 Series Explosionproof Ultrasonic Flow Meter

Dual Mode Field Transmitter

Standard Flow Meter Features

  • Dual mode field transmitter
  • Easy to install clamp-on sensors with no process interruption
  • Non-invasive flow measurement of liquids , no pipeline disturbance, no pressure loss
  • Suitable for all commonly used pipe materials with pipe diameters from 10 mm to 6.5 m (1/4" to 256" )
  • 2 flow channels standard, IP 66 housing
  • Certified for hazardous areas Zone 1 & 2

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Heat Calculator : Clamp on Flow Meter

HEAT CALCULATOR – Clamp on Flow Meter

Calculate the heat quantity

The EESIFLO Heat Calculator flow meter can supplied either as a portable or permanently clamped on unit. Flow is measured at the outlet of the heat source by non invasive transducers which do not require cutting of the pipe, while temperature measurements (T1/T2) are continually fed into the flow calculator to output the heat flow in KW/HR or BTU.

Flow and energy consumption data can be sent back to the control room using our standard analog output or optional modbus over RS 485.

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Portable Flowmeters 

Measuring Flow Worldwide

EESIFLO ® clamp on ultrasonic flowmeters have been installed in almost every geographical location in the world for more than a decade. We are a successful flow meter manufacturer supplying easy to use, highly accurate flow solutions to clients who wish to determine and report accurate liquid flow rate without having to halt a process or cut through pipes.  A high quality clamp on flow meter should be capable of maintaining accuracy in working in conditions where there are temperature fluctuations in the process and the surrounding environment.

The electronics and sensors should be able to measure the flow of clean liquids but also possess the ability to handle some amount of bubbles and solids. In addition, it is important that the manufacturer you purchase from has a successful track record and a long user list of satisfied clients who have benefitted from the devices. EESIFLO meets all the above criteria and more!



The EESIFLO clamp on Doppler meters rely a principal that requires moving reflectors in the liquid. The reflectors can be small or larger amounts of solids or bubbles but not necessarily moving at the same flow rate as the media. Ultrasonic waves are transmitted by the sensor through the pipe wall into the media where they are reflected back off the moving particles and again back up through the pipe wall where they are picked up by an ultrasonic receiver.


Transit Time Ultrasonic Flow Meter working principle. Bursts of signals are sent back and forth from sensor A to sensor B. If there is no flow, the time for sensor A-B and B-A is the same but when a velocity is present, it takes more time for the downstream to upstream sensor ultrasonic beam to reach its destination vs the upstream to downstream. This time differential is measured and referred to as the delta-T and corresponds to the uncorrected flow velocity. The pipe dimensional details enable a volumetric calculation while the fluid type information enables Reynolds correction for corrected flow e.g. laminar/transitional/turbulent.

Traditionally transit time meters have been recommended for clean applications where bubbles and solids are not present. Users ask questions like “Should I be using Doppler or Transit-Time Flow Meter?” Unless you are sure of the answer, your only solution is to carry a Doppler flowmeter in one hand and a Transit-Time meter in the other, and use both of them when one does not work.

The “Doppler” and “Transit-Time” technology have their advantages and disadvantages but EESIFLO transit time flow meters are capable of working in applications that contain a considerable amount of suspended solids and air bubbles so that it is possible to use a single device for more than 95% of applications.


Check list and current status of products previously manufactured by EESIFLO
that are not shown on this website.

A green tick   denotes that there is still full support for the product.

A red cross  denotes that the product has been discontinued.

An  means that there is limited support. Please check with EESIFLO on the availability of parts.


6000 Series – Portable ultrasonic flow meter.  Single and Dual Channel versions with Energy Options. Standard and High Temperature Transducers
EASZ-10FP  Hand Held Portable ultrasonic flow meter with sound laboratory type sound speed measurement option
EASZ- 11FP  Dual Channel Flow Meter in IP68 Enclosure
EASZ-10P – Portable Clamp on Doppler Flow Meter
EASZ-3000 – Fixed Type Clamp on Doppler Flow Meter
EASZ-11 – Open Channel Flow Meter (Ultrasonic level type)
TG-11 Ultrasonic Thickness Gage