The electromagnetic flowmeter is an inductive instrument that measures the volumetric flow rate of conductive media in a pipe based on Faraday's law of electromagnetic induction. It mainly consists of two parts: the sensor and the converter.
When a conductive liquid flows through the measuring pipe, it cuts the magnetic lines of force generated by the excitation coil. As a result, an induced electromotive force is generated in a direction perpendicular to both the magnetic field and the flow direction. This induced electromotive force is proportional to the flow velocity of the fluid. By measuring the magnitude of the induced electromotive force, the volumetric flow rate of the fluid can be calculated.
High measurement accuracy: It can accurately measure the flow rate of various conductive liquids without being affected by changes in fluid density, viscosity, temperature, pressure, and conductivity (within a certain range). The measurement accuracy can reach ±0.2% - ±0.5%.
Capable of measuring multiple fluids: Suitable for measuring the flow rate of various acid, alkali, and salt solutions, as well as conductive liquids such as mud, slurry, and pulp.
No pressure loss: There are no components in the measuring pipe that impede the fluid flow, so there is no pressure loss, which greatly reduces energy consumption, especially suitable for flow measurement in large - diameter pipelines.
Bidirectional measurement: It can measure both forward and reverse flow rates, facilitating the monitoring and control of bidirectional flow in industrial production.
Diverse lining materials: According to different measuring media, different lining materials can be selected, such as neoprene, polyurethane rubber, polytetrafluoroethylene, etc., to ensure good corrosion resistance and wear resistance.
High degree of intelligence: The converter is usually equipped with intelligent interfaces, enabling remote data transmission, display, alarm, and integration with other automated systems.
Parameter | Details |
---|---|
Nominal Diameter | 15mm - 3000mm (special specifications can be customized) |
Measurement Accuracy | Generally ±0.2% - ±0.5% (varies by model) |
Repeatability | ≤0.1% |
Flow Velocity Range | 0.3m/s - 15m/s (optimal measurement range is 1m/s - 5m/s) |
Fluid Conductivity | ≥5μS/cm (slightly different requirements for different models) |
Operating Pressure | Generally 1.6MPa, 2.5MPa, and the high - pressure type can reach 6.4MPa and above |
Medium Temperature | Depends on the lining material. Neoprene: -20°C - +60°C; Polyurethane rubber: -20°C - +80°C; Polytetrafluoroethylene: -40°C - +180°C |
Ambient Temperature | -25°C - +60°C |
Output Signal | 4 - 20mA analog signal, frequency signal (0 - 1kHz), RS485 digital signal, Modbus protocol, etc. |
Power Supply | AC: 220VAC ±10%, 50Hz; DC: 24VDC ±10% |
Protection Level | Sensor: IP65, IP67, IP68 (submersible type); Converter: IP65 |
Explosion - proof Level | Flame - proof type ExdⅡBT4, Intrinsic safety type ExiaⅡCT6, etc. (optional) |
Lining Material | Neoprene, polyurethane rubber, polytetrafluoroethylene, acid - resistant rubber, etc. |
Electrode Material | Stainless steel 316L, Hastelloy C, titanium, tantalum, platinum - iridium alloy, etc. |