Fundamentals of hydrostatic level measurement

By E Bossart, WIKA


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Published in:

Electricity+Control, June 2013 (pages 50 - 55)

Enquiries: WIKA Instruments South Africa.

Tel. 011 621 0000 or email


Level measurement has seen considerable change over the past decades - from purely mechanical level measurement through to complex electronic sensors using various measuring principles. The large number of different technologies for measuring level (such as hydrostatic, reed chain, magneto-resistivity, radar, ultrasound, optical and many more) makes it possible for the user to choose the most suitable sensor technology for every individual application. In continuous level measurement, hydrostatic pressure (also known as hydrostatic level measurement) is the principal sensor technology and measuring principle, with a market share of approximately 40% by sales volume. Still considerably ahead of ultrasound and radar technologies, hydrostatic sensors for level measurement are installed in more than every second measuring point.


Take note

  • Level measurement has moved from being purely mechanical to involving complex electronics.
  • Hydrostatic level measurement however, remains the most important measuring principle.
  • Hydrostatic sensors are expected to continue to show increased market share.