Of the many different types of flowmenters in use today pehaps Helical gear flowmeters
(which get their name from the shape of its helix shaped rotors) is perhaps the most unusual. This flowmeter works by the measured fluid flowing through the meters internal compartments causing the rotors to rotate. The flow rate is then determined as a predetermined factor related to the of speed of the rotor
Glossary for Water Quality Testing Terms
Below are the terms relating to Water Quality Testing for the section you have selected.