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Measuring method
Comparison with alternative methods
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Sonic velocity measurement

The LiquiSonic® technology is based on sonic velocity measurement. With this ultrasonic measuring method the concentration in a liquid can be determined accurately and quickly, as the sonic velocity in a liquid depends on the concentration of the each liquid component and the temperature.

To determine the sonic velocity, a signal is transmitted through the liquid and the time is measured until the signal reaches the receiver. Since the distance between the ultrasonic transmitter and receiver is constant, the sonic velocity can be calculated.

Properties of the LiquiSonic® measuring method:
  • measurement is independent of the color, conductivity and transparency of the process fluid
  • measuring accuracy of 0.1 wt%
  • high, drift-free measuring accuracy even at high proportion of gas bubbles
  • updating of measuring values every 250 ms
  • installation directly in pipelines or vessels
  • bypass-free installation
  • robust sensor design without gaskets or moving parts
  • maintenance-free measurement technology
  • insensitive to contamination
  • use at temperature from –90 °C to 200 °C
  • use at pressure up to 500 bar
  • use of special sensor materials in corrosive liquids
  • integrated temperature measurement

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