Production of battery flowmeter

Ding HuanElectromagnetic FlowmeterProduct principle:

The measurement principle is based on Faraday's law of electromagnetic induction. The measuring tube of the flowmeter is a non-magnetic alloy short tube lined with insulating material. Two electrodes are fixed on the measuring tube through the tube wall along the diameter direction, and their electrode heads are basically flush with the inner surface of the lining.When the excitation coil is excited by two pulse waves, a magnetic flux density of will be generated in the direction perpendicular to the axis of the measuring tubeAt the working magnetic field of B, if a fluid with a certain conductivity flows through the measuring tube, it will cut the magnetic field lines and induce an electromotive force E. The electromotive force E is proportional to the magnetic flux density B, and the product of the inner diameter d of the measuring tube and the average flow velocity v. The electromotive force E (flow signal) is detected by the electrode and sent to the converter through the cable. After the converter amplifies and processes the flow signal, it can display the fluid flow rate and output signals such as pulses and analog currents for flow control and regulation.

In the equation, k and d are constants. Since the excitation current is constant, B is also constant. Therefore, from E=KBdv, it can be seen that the volume flow rate Q is proportional to the signal voltage E -, that is, the signal voltage E induced by the flow velocity is linearly related to the volume Q. Therefore, as long as E is measured, the flow rate Q can be determined, which is the basic working principle of electromagnetic flow meters.

According to E=KBdv, parameters such as temperature, density, pressure, conductivity, and liquid-solid composition ratio of the measured flow medium will not affect the measurement results. As for the flow state, as long as it conforms to axisymmetric flow (such as laminar or turbulent flow), it will not affect the measurement results. Therefore, electromagnetic flowmeter is a true volumetric flowmeter. For manufacturers and users, the volumetric flow rate of any other conductive fluid medium can be measured without any correction as long as it is calibrated with ordinary water. This is a prominent advantage of electromagnetic flow meters that other flow meters do not have. There are no active or obstructed components inside the measuring tube, so there is almost no pressure loss and high reliability.

Electromagnetic FlowmeterApplication:Widely used in environments such as sewage, petroleum, environmental protection, water treatment, etc., with a diameter of DN10L-DN500L optional. The electrode is made of 316L stainless steel Ti Ta HB HC stainless steel coated with tungsten carbide platinum iridium alloy. Before selection, the appropriate diameter, lining, and electrode material should be selected.