Ultrasonic metering technology The ultrasonic meter is without
any movable parts. Two ultrasonic transducers are used to send
sound signals both against and with the flow. The ultrasonic
signal traveling with the flow reaches the opposite transducer
first. The time difference between the two signals can be
converted into flow velocity and subsequently into volume. This
method has proven to be extremely measuring stable and
endurable. Mechanical meters contain an impeller which is
vulnerable to particles and chalk sediments. A possible
consequence is that the meter will over time stop registering
the very low flow rates that can be signs of leaks in the
system. Illustration 1: Sectioned ultrasonic meter showing the
ultrasonic metering principle. The ultrasonic metering method’s
accuracy and measuring stability over time are being repeatedly
confirmed by accredited international labs like the German
energy efficiency association, AGFW, and random checks performed
by Danish authorities3 Kamstrup’s ultrasonic met