Klinger’ Ultrasonic Flowtransmitters are based on the simultaneous transmission of one ultrasonic signal downstream and one countercurrent.
Since the countercurrent signal will be longer along the way, the difference in travel times will be an expression of the liquid velocity, which can be calculated purely electronically, as it turns out that measurement of the flow velocity, based on ultrasound, is:
- Independent of media density
- Independent of the viscosity of the media
- Independent of the speed of sound in the current media