FLOWTECH Metal Tube Variable Area Flow Meters (Rotameters) are intended for application where high pressure, temperature OR corrosive conditions preclude the use of conventional glass tube. These are all Metal Variable Area type Flowmeter design to measure flow rate of liquids, gases & steam under critical conditions. It consists of a tapered metal tube, an indicating assembly and a float. A magnet encapsuled in float couples with rotating magnets connected to an indicating pointer, thus the movement of the float, is accurately indicated