/ RDLs
/ ISO 15926 Part 4: Core reference data - Edition 4
/ VOLUME FLOW MEASURING ELEMENT - ULTRASONIC DOPPLER
VOLUME FLOW MEASURING ELEMENT - ULTRASONIC DOPPLER
Identifier
Definition
A <VOLUME FLOW MEASURING ELEMENT - ULTRASONIC DOPPLER> is a <VOLUME FLOW MEASURING ELEMENT - VELOCITY> that measures the Doppler shift resulting from reflecting an ultrasonic beam off the particulates in flowing fluid. The frequency of the transmitted beam is affected by the movement of the particles; this frequency shift can be used to calculate the fluid velocity. For the Doppler principle to work there must be a high enough density of sonically reflective materials such as solid particles or air bubbles suspended in the fluid