Towards the end of the 1970s, Endress+Hauser founder Georg H. Endress created a vision of a permanently sealed sensor made entirely of metal. Endress’ vision involved a sensor with a single rod to check the presence of liquid. Capacitive and conductive measuring principles were unsuited to the task, since they could not be used in an instrument composed entirely of metal.
At the start of the 1980s, a group of developers devised a solution to their employer’s conundrum by developing a symmetrical double-rod device. A new measuring principle was born: vibronic.
A piezoelectric device causes the fork to vibrate. When the medium covers the metallic fork, the vibration frequency changes, and the sensor converts this information into an output signal.
Until today an installed base of more than 6 million vibronic Point level switches worldwide is testament to the Liquiphant’s day-to-day reliability. The universal measuring principle does not need any adjustment for different media. Today you have mobile access to the data. Liquiphant is designed according to functional safety principles and is very easy to use.