An Optimised Technique for Low Flow Measurement by Trevor Forster, Titan Enterprises Ltd

There is an increasing demand for the improved measurement of low flow rates of liquids in the food, beverage, pharmaceutical, laboratory, medical and industrial sectors. The measurement of low flow rates is difficult for a number of reasons. With mechanical flow meters all the moving parts must move with virtually no friction or the linearity of the meter will be poor. In addition the bearings must be high quality or they could be contaminated by the fluid.

Typically low flow applications require flowmeters that can operate over a wide range of flows, providing a linear performance independent of the Reynold’s Number and with a meter construction which is clean bore such that the meter can be cleaned by the passage through the meter of the fluid being monitored.

For further reading, please read our introduction to measuring low flow rates of liquids: ultrasonic flowmeters: