When the bar flowmeter is magnetized by two-way square wave pulse, a flux density will be generated in the direction perpendicular to the axis of the measuring tube as the working magnetic field. At this time, if the liquid with a certain conductivity flows through the measuring tube, the cutting magnetic field line will induce the electromotive force. The electromotive force is proportional to the flux density, and the product of the inner diameter D of the tube and the average velocity V is measured. The electromotive force is detected by the electrode and sent to the converter through the cable. After the converter becomes large flow signal, the rod steam flowmeter can display the information flow and output single pulse, touch current and other signals to carry out flow monitoring and adjustment. When the controller is installed in the step pipeline with sufficient long nozzle section, there is no need for vortex in the flow section.

    The bar flowmeter is not easy to block in front of the camera to produce high pressure area, and the working pressure is slightly higher than the negative pressure of the pipeline to block the particles from entering. The velocity of the fluid at the high pressure tap hole of the probe is zero, and no object will enter the tap hole. Under the static pressure of the pipeline, the fluid enters the elbow and forms the state of pressure balance quickly. When the pressure equilibrium state is formed, the fluid will encounter high pressure at the inlet of the elbow, bypass and no longer enter the elbow. The rod type steam flowmeter is vertical to the pipe axis, and there are several measuring pressure holes on the surface of the measuring rod. The static pressure of the flow tube wall can also be used to replace the static pressure of the back flow surface of the sensor.