Installation of electromagnetic flowmeters

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Electromagnetic flowmeters (EMF for short) are a new type of flow measurement instrument that developed rapidly in the 1950s and 1960s alongside the progress of electronic technology. An electromagnetic flowmeter is an instrument that utilizes the principle of electromagnetic induction to measure the flow rate of conductive fluids, based on the electromotive force generated when such fluids pass through an external magnetic field. Installation instructions: 1. Selection of installation location: To ensure the reliable and stable operation of the sensor, the following requirements should be taken into account when choosing the installation location: (1) Try to avoid ferromagnetic objects as well as equipment with strong magnetic fields (such as large motors, large transformers, etc.), so as to prevent the magnetic field from affecting the sensor’s operating magnetic field and flow signals. (2) It should be installed in a dry and well-ventilated area as much as possible; it is not suitable to be installed in damp places where water tends to accumulate. (3) Exposure to sunlight and rain should be avoided as much as possible, as well as conditions where the ambient temperature is above 60°C and the relative humidity is above 95%. (4) Choose a location that is easy to maintain and convenient for access. (5) The flow meter should be installed at the rear end of the water pump; it must not be installed on the suction side ； The valve should be installed on the downstream side of the flow. 2. Installation requirements: For accurate measurements, the following requirements should be considered when selecting a location on the pipeline: (1) The sensor can be installed on straight pipelines as well as on horizontal or inclined pipelines, provided that the line connecting the two electrodes remains horizontal. (2) The medium should flow fully within the pipe at the installation location, to avoid incomplete filling of the pipe and gas adhering to the electrodes. (3) For liquid-solid two-phase fluids, vertical installation is preferred to ensure even wear of the sensor lining and extend its service life. (4) When the medium in the installation location is not sufficient, the pipeline at the rear end of the flow meter can be raised to ensure a full pipeline; it is strictly prohibited to install the flow meter at the highest point of the pipeline or at the outlet.