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Electromagnetic flowmeters are classified by application into general-purpose, explosion-proof, sanitary, submersible-resistant, and submersible types. The so-called sanitary-grade electromagnetic flowmeter is essentially a type of flowmeter designed for use in hygienic conditions. It is primarily used in industries such as cheese production, food processing, pharmaceuticals, and biochemistry, where regular steam sterilization is required. The sensor must be easy to disassemble and clean, and the connections to the pipes should feature a fast-installation design that meets hygienic standards. The materials in contact with the liquid must be non-toxic and harmless. The sanitary-grade electromagnetic flowmeter was developed precisely to meet the above requirements. Next, a brief introduction to the selection method for sanitary-grade electromagnetic flowmeters is provided. Selection method for sanitary-grade electromagnetic flowmeters: 1. Flow rate – determine the scale of the flowmeter based on the maximum flow rate. 2. Determine the diameter of the flow meter based on the flow rate and the size of the industrial pipeline. Generally, a flow meter that matches the pipeline is chosen. 3. Select the flow meter lining based on the properties of the measured medium. Such as temperature, corrosivity, and whether there might be negative pressure inside the pipeline, etc. Common linings include PTFE, soft rubber, hard rubber, PFA, ceramics, and so on. 4. Select the material of the measuring electrode based on the properties of the medium. Commonly, there are 304, 316, Hastelloy, titanium, tantalum, and so on. 5. Select the pressure rating of the flanges at both ends based on the pressure rating of the process pipeline. 6. Select the protection rating: if the sensor is entirely underwater, IP68 should be chosen. The above covers the sensor part; there is also the transmitter part. 1. Determine whether to choose an integrated or separate type based on the requirements of the installation location. 2. What type of output is required: 4-20 mA signals, Hart, Profibus PA, FF, etc. 3. Are explosion-proof requirements necessary? Determine the explosion protection rating.