Variable area flowmeters or rotameters are suited for laboratory and industrial applications. Flowmeter design consists of a float—usually a sphere—enclosed in a tube. The float responds to change in velocity of the fluid (gas, air, or liquid) by moving up or down the flow tube. We offer corrulated and direct flowmeters for common, aggressive, and ultrapure fluids. Or, create your own component system with our single or multitube flowmeter systems. We have a variety of frames and flowtubes, so you can create a flowmeter system to meet your exact needs.