Electromagnetic flowmeters measure volumetric flow of conductive liquids using Faraday's law. Choosing the right model and specification ensures accuracy, stability, and long service life. A typical model code includes meter size, liner, electrode, pressure rating, output, and power supply. For example, an EM-FM-100-PTFE-HC-1.6-4-20mA model may indicate DN100, PTFE liner, Hastelloy C electrodes, 1.6 MPa, and 4-20mA output.

Key specifications include nominal diameter from DN6 to DN3000, flow range, accuracy ±0.5% or ±0.2%, repeatability, conductivity requirement above 5 µS/cm, and fluid temperature depending on liner. Liner options: rubber, PTFE, PFA, F46, and ceramic. Electrode options: stainless steel, Hastelloy, titanium, tantalum, and platinum. Pressure ratings: 0.6, 1.0, 1.6, 2.5, 4.0 MPa. Ambient temperature, protection IP65/IP67/IP68, and explosion-proof Exd/Exia.

Outputs may include 4-20mA, pulse, frequency, HART, RS485 Modbus, Profibus, and Ethernet. Power supply: 220V AC, 24V DC, or battery. Body material: carbon steel, stainless steel, or aluminum. Installation requires straight pipe runs, grounding, and full pipe. Models vary for sanitary, wastewater, chemical, slurry, and high-temperature use.

Before ordering, confirm fluid, pipe size, flow range, temperature, pressure, connection standard, and communication. This prevents model mismatch and ensures reliable measurement.