The normal data flow for a mass air flow sensor varies for each vehicle model. Generally, the signal voltage at idle ranges between 1.2 and 1.6. The operating voltage of a mass air flow sensor is consistently 12V, with the variable component being resistance. The working principle is as follows: When the driver presses the accelerator, the ECU determines the angle of the mass air flow sensor based on the fuel injection volume. As the angle changes, so does the resistance. Mass Air Flow Sensor: It is a device that converts the inhaled air flow into electrical signals. The advantages of a mass air flow sensor include minimal pressure loss and a wide measurable flow range. The ratio of maximum to minimum flow rates is typically above 20:1, suitable for a broad range of industrial pipe diameters up to 3m. The output signal is linear with the measured flow, offering high accuracy. It can measure the flow of fluids with conductivity ≥1μs/cm, including acid, alkali, salt solutions, water, wastewater, corrosive liquids, as well as slurry and mineral slurry. However, a mass air flow sensor cannot measure the flow of gases, steam, or pure water. During the operation of a mass air flow sensor: Gas passing through the sensor drives the rotation of turbine blades. The number of rotations of the impeller is proportional to the volume of gas passing through the sensor. A specially designed patented flow guide frame is installed at the inlet of the sensor to accelerate the incoming airflow as the velocity increases.
