Water and Wastewater Terms Beginning R

A B C D E F G H I J K L M N O P Q R S T U V W Y Z

rotameter (ROTE-uh-ME-ter)

A device used to measure the flow rate of gases and liquids. The gas or liquid being measured flows vertically up a tapered, calibrated tube. Inside the tube is a small ball or bullet-shaped float (it may rotate) that rises or falls depending on the flow rate.