Panametrics PanaFlow MV80, User Manual, Page: 14 / 184

FLOW
Chapter 1. Introduction
2 PanaFlow™ MV80, MV82 & MV84 User’s Manual
Figure 1: In-Line Vortex Multi-Parameter Mass Flow Meter
1.3 Velocity Measurement
The PanaFlow vortex velocity sensor is a patented mechanical design that minimizes the effects of pipeline vibration
and pump noise, both of which are common error sources in flow measurement with vortex flow meters. The velocity
measurement is based on the well-known Von Karman vortex shedding phenomenon. Vortices are shed from a
shedder bar and the vortex velocity sensor located downstream of the shedder bar senses the passage of these
vortices. This method of velocity measurement has many advantages including inherent linearity, high turn-down,
reliability, and simplicity.