Analysis and Introduction of Installation Methods for Electromagnetic Flowmeters

How to install electromagnetic flowmeter: horizontal and vertical installation; Ensure full pipe installation; Installation between bends, valves, and pumps; Sensors cannot be installed at the inlet of the pump; The inlet and outlet straight pipe sections of the sensor; Installation when the pipeline outlet is empty; Series installation and parallel installation.

1．Electromagnetic FlowmeterHorizontal and vertical installation: The sensor can be installed horizontally and vertically, but it should be ensured to avoid the impact of sediment and bubbles on the measured electricity, and the axis of the electricity should be kept horizontal. When installed vertically, the fluid should move from below. Sensors cannot be installed in pipelines Location, this location is prone to accumulating bubbles.

2Electromagnetic flowmeter ensures full pipe installation: Ensure that the flow sensor is filled with the measured fluid in the pipeline during measurement and that there is no non full pipe state. If the pipeline is not full or the outlet is empty, the sensor should be installed on the siphon tube.

3Installation of electromagnetic flowmeter bends, valves, and pumps: To ensure measurement stability, a straight pipe section should be installed before and after the sensor, with the length given in the following figure. If it cannot be achieved, a current stabilizer should be used or the cross-sectional area of the measurement point should be reduced.

4The electromagnetic flowmeter sensor cannot be installed at the inlet of the pump: to avoid negative pressure, the sensor should not be installed at the inlet of the pump, but at the outlet of the pump.

5The inlet and outlet straight pipe sections of the electromagnetic flowmeter sensor: An ideal installation location should be chosen with sufficient straight pipe sections before and after the measurement point. Imported straight pipe sections should≥5DExport straight pipe section≥3D（DThe nominal diameter of the sensor. The plug-in inlet straight pipe section should≥20 DExport straight pipe section≥7D（DThe nominal diameter of the sensor.

6Installation of electromagnetic flowmeter when the outlet of the pipeline is empty: When the outlet is empty, the sensor should not be installed at the empty position of the pipeline, but should be installed at a lower position. When the sensor is installed below the pipeline, it should be ensured that the sensor is filled with liquid and there should be no empty tube state.

7Electromagnetic flowmeter series installation and parallel installation: If there are several sensors that need to be connected in series on the same pipeline in order, the distance between each sensor should be less than2The length of a sensor. If two or more sensors are installed in parallel with each other, the distance between the sensors must be greater than1mThe flow signal generated by the sensor is very small, only a few millivolts at full range, so the sensor grounding should be good.

Electromagnetic FlowmeterWhat are the advantages:

1.The sensor structure is simple, with no movable parts inside the measuring tube and no throttling components that hinder fluid flow. When the fluid passes through the flowmeter, it will not cause any additional pressure loss.

2.It can measure the flow rate of contaminated media, corrosive media, and suspended liquid-solid two-phase flow. This is because there are no obstructing flow components inside the instrument measuring tube, and only the inner lining and electricity of the measuring tube are in contact with the measured fluid. The material can be selected according to the properties of the measured fluid.

3.Electromagnetic flowmeter is a volumetric flow measurement instrument that is not affected by the temperature, viscosity, density, or conductivity (within a certain range) of the measured medium during the measurement process. Therefore, after being calibrated with water, electromagnetic flow meters can be used to measure the flow rate of other conductive liquids.

4.The output of an electromagnetic flowmeter is only proportional to the average flow velocity of the measured medium, and is independent of the flow state under symmetric distribution (laminar or turbulent). soElectromagnetic FlowmeterThe measuring range is wide, and its measurement range can reach up to100：1Some are quite impressive1000：1The operational flow range.

5.Electromagnetic flowmeter has no mechanical inertia, sensitive response, can measure instantaneous dynamic flow, and can also measure flow in both positive and negative directions