Mass Flow’s fuel flow meter calculates the fuel consumption of vehicles. A two three-dimension ring type chambers are provided in this meter. The chambers are responsible for producing impulse at the point when the volume of the fuel passes through it. Electronic scheme is in-charge with the impulses deduction and output impulses formation. Kitagawa made this meter functional with vehicle tracking systems and fuel monitoring systems in the motor. Another feature of the meter include a built-in fuel filter and a wide clearing section that reduces hydraulic resistance of fluid flow. It is made with a strong metal case, and is easy to be mounted and operated. Digital processing of signal measures the extended work range and the fuel flow.