Laboratory and Process Instrumentation Equipment

Field Instruments and Flow Monitoring


The suitable solution for each application. Tried and tested measurement systems to perfectly fit your needs. Measuring systems which accurately measures what they should reliably and accurately even under difficult conditions.

Product range:

  • Sensor technology
  • Transmitter
  • Intelligent transmission of measurement data
  • Software solutions

NivuFlow 750

Flow metering at the highest technical level. Universal use in wastewater for part filled pipes and channels.

  • Very high measurement accuracy
  • Suitable even for very difficult applications
  • Real-time measurement of real flow velocity profiles
  • Intuitive, modern operating concept for quick and easy initial start-up
  • No calibration required
  • Extensive diagnostic functions for reliable initial start-up and quick maintenance

Wedge Sensor Cross Correlation

For installation on channel bottom or channel wall various version:

  • Combined v- and 2 x h-measurement (ultrasonic and pressure)
  • Combined v- and h-measurement (pressure)
  • Combined v- and h-measurement (ultrasonic)
  • V-measurement only

Cross Correlation Method

  • The measurement method for universal use in slight to heavily polluted water
  • Very high accuracy
  • Measures the real flow velocity profile

Reflectors within the water are scanned by ultrasonic impulse and subsequently are saved as echo patterns. A second scan follows a few milliseconds later.
Correlating both signals allow us to calculate the flow velocity.
Repeating this procedure in varying flow levels enables determination of the real flow velocity profile.


Doppler Method

  • For measurement in slight to heavily polluted water
  • Latest intelligent fourth-generation Doppler technology

The Doppler method uses a continuous ultrasonic signal with a defined frequency and known angle to be sent into the water. The moving particles generate a frequency shift which is proportional to the flow velocity of particles.
These values are used for statistical averaging.


Transit Time Method

  • For clean to slightly polluted water
  • Very high measurement accuracy

It is based on detecting the transit time of ultrasonic signals between two sensors. The signal transit time towards flow direction is shorter than against the flow direction. The difference between both transit is proportional to average flow velocity along the measurement path.


Radar Method

  • Non-contact measurement
  • For all liquid media
  • Installation without interrupting processes

The radar merter detects the flow velocity on the water surface. The surface velocity can be detected by reflections of the radar signals on surface waves.
The evaluation of the signals are done by the Doppler method.

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