flowmeter

/ˈfloʊˌmiːtər/
noun
  1. An instrument used to measure the rate of flow of a liquid or gas.
    • The plumber used a flowmeter to check the water pressure in the pipes.
    • The lab technician read the flowmeter to ensure the gas was flowing at the correct rate.
    • A flowmeter on the fuel line helps monitor engine efficiency.
Synonyms