The important instruments used to measure flow have been listed below:

Secondary or rate meters

Head Type Flow Meters

Obstruction meters

●      Orifice meter

●      Flow nozzle

●      Venturi meter

●      Rota meter (variable area meter)

Pitot tube (Total Pressure Probe)

Special Methods

●      Magnetic flow meter

●      Ultrasonic flow meter (travel time difference method and the oscillating loop system)

●      Turbine type anemometer or turbine meter

●      Hot Wire anemometer (constant current and constant temperature methods)