KLINGER OUF is an ultrasonic level meter for measuring and monitoring liquid level in connection with flow measurement in open channels.

The flow measurement in open channels with the hydraulic relief method is carried out with the use, inside the channel or partially filled pipe, of a hydraulic modeller, a probe for measuring the level (in this case ultrasound, without contact with the liquid itself ) and an associated control unit for the conversion of the level in the corresponding instantaneous flow.