Using Ultrasonics to Measure Process Variables

Abstract

Ultrasonics can be used in industrial processes to measure a number of variables. Liquid level can be determined by pulse-echo techniques. Flowrates can be measured by time-of-flight or doppler methods. The latter can also provide flow distributions. Fluid temperature and solute concentrations can be deduced from the sonic velocity. Particle and gas contents can also be monitored. Ultrasonics is essentially a non-invasive technique, and technology suitable for high temperature or corrosive conditions is available.