A split-type electromagnetic flowmeter is a high-precision flow measurement instrument designed with a separated structure of sensor and converter. It inherits the core measurement principle of electromagnetic induction while solving installation and application limitations of integrated models, making it widely used in complex industrial scenarios.

1. Core Structure & Working Principle

• Two key components: The sensor (installed on-site) consists of a measuring tube, electrodes, excitation coil, and lining. The converter (installed remotely) is responsible for signal processing, data display, and output.
• Working mechanism: When conductive medium flows through the sensor’s magnetic field, an induced electromotive force proportional to flow velocity is generated. The sensor collects this signal and transmits it to the converter via a dedicated cable. After amplification, filtering, and calculation, the converter outputs standard signals (e.g., 4-20mA, HART) or displays flow data directly.
• Connection requirement: The sensor and converter are connected by a special signal cable, with a typical maximum distance of 10-100 meters (varies by manufacturer and model).

2. Core Advantages

• Flexible installation: The separated design allows the converter to be installed in a convenient, dry, and low-interference location, even when the sensor is mounted in narrow, harsh, or hard-to-reach areas.
• Strong environmental adaptability: The sensor is designed with high protection levels (usually IP65/IP68) to resist high temperature, humidity, vibration, dust, and corrosive gases. The converter avoids direct exposure to harsh conditions, ensuring stable performance.
• Easy operation & maintenance: The converter can be placed in a centralized control room or at eye level, facilitating parameter setting, data reading, and routine maintenance without accessing the on-site sensor.

3. Typical Application Scenarios

• Harsh on-site environments: Such as chemical plants, oil refineries, or wastewater treatment plants with high temperature, high humidity, strong corrosion, or heavy dust.
• Space-constrained installations: For pipelines buried underground, installed at high altitudes, or in dense equipment areas where integrated meters are difficult to install or operate.
• Remote monitoring needs: Projects requiring centralized data collection, such as long-distance pipeline transportation, outdoor industrial pipelines, or large-scale production lines.

4. Key Selection & Installation Notes

• Cable matching: Use the dedicated signal cable provided by the manufacturer to prevent signal attenuation or electromagnetic interference.
• Sensor installation: Follow the same requirements as integrated models—ensure full-pipe flow, sufficient straight pipe sections (front 10D/back 5D), proper grounding (ground resistance <10Ω), and avoid installing near pumps, valves, or elbows.
• Converter placement: Install in a dry, well-ventilated area with ambient temperature within -10℃~60℃, away from frequency converters, high-voltage cables, or other strong electromagnetic interference sources.