Split Type Electromagnetic Flow Meter

The core feature of the split magnetic flow meter is the separate installation of the electromagnetic flow sensor (flow tube) and the intelligent signal converter (transmitter). These two main components are connected via specialized signal cables.

Main components

• Electromagnetic flow sensor (flow tube): This is the part installed directly on the pipe and contains the measuring tube, excitation coil, electrodes, etc. The electromagnetic flow sensor (flow tube) is used to measure the flow of a liquid. When the conductive liquid flows through the measuring tube, an induced electromotive force is generated under the action of the magnetic field, and this signal is collected by the electrodes.
• Intelligent Signal Converter (Transmitter): This is the part that is installed in a control room or other place with good environmental conditions away from the pipe. It receives the weak electrical signals from the sensor, amplifies, filters, digitizes, and finally outputs signals proportional to the flow rate (e.g., 4-20mA current signals, pulse signals, digital communication signals, etc.), which are used for display, recording, control, or data acquisition systems.

Connection method

Sensors and converters are connected via shielded cables, usually requiring the use of specialized multi-core cables to ensure the accuracy of signal transmission and anti-interference capability. Depending on the installation environment and distance requirements, the length of the cable will vary, but there is usually a certain limit.

Advantages

1. Suitable for harsh environments: This is the main advantage of the split electromagnetic flow meter. As the converter contains sophisticated electronic components, it is more sensitive to ambient temperature, humidity, corrosive gases, vibration and other factors. Separate installation of the converter and the sensor can be placed in the control room or other safe areas with better environmental conditions, thus protecting the electronic components, extending the service life of the instrument and improving the reliability of the measurement.
2. Facilitates installation of transducers in overhead or hard-to-reach piping: At some industrial sites, piping may be located in high places, confined spaces, or other hard-to-reach areas. It is easier and safer to install the lightweight transducer separately.
3. Easy maintenance and commissioning of the transducer: The transducer is usually equipped with a display and operating buttons for parameterization, troubleshooting, etc. The transducer can also be used as a control panel. Mounting them in an easily accessible place makes it easier for the operator to perform maintenance and commissioning.
4. Reduce the weight of the sensor part: For large diameter electromagnetic flowmeter, the weight of the sensor itself may be large. Split design makes the weight borne by the pipeline is only the weight of the sensor part, reducing the burden on the pipeline.

Applications

• High-temperature or low-temperature environments: such as boiler feed water, high-temperature steam piping, low-temperature liquid piping, etc.
• High humidity or corrosive environment: such as chemical industry, metallurgy, sewage treatment and other industries in harsh working conditions.
• Strong vibration or shock occasions: such as the outlet of pumps, piping near large machinery and equipment.
• Pipelines with limited installation space but in harsh environments: Sensors can be installed in small spaces, while converters can be installed in far away places with good environments.
• The need for centralized monitoring and management of the occasion: a number of split electromagnetic flowmeter converter unified installation in the control room, to facilitate centralized monitoring and data collection.