As a result of the twist in the flow tubes, the sine waves generated by the pickoffs are now out of phase with each other because the inlet legs are lagging behind the outlet legs.

The time delay between the two sine waves is measured in microseconds, and is called Delta-T. Delta-T is always directly proportional to the mass flow rate – the greater the Delta-T created by the Coriolis force, the greater the mass flow rate.

With Micro Motion MVD™ digital signal processing, time delay is measured 2400 times faster enabling Delta T to be measured with faster response, less noise, and additional diagnostics.

Delta-T is a function of both the phase difference and the frequency of the sine wave signals.