Electromagnetic flowmeters are flow measurement instruments widely used in industrial automation and control. Based on their installation method and structural features, electromagnetic flowmeters can be divided into three types: insertion type, straight tube type, and split type.
Insertion Type Electromagnetic Flowmeter
The sensor of an insertion type electromagnetic flowmeter is inserted into the pipe to measure the flow rate of the fluid. They offer advantages such as simple structure, low price, and easy maintenance. They also have a wide measurement range and are suitable for measuring the flow of media such as liquids and steam. A disadvantage of insertion type electromagnetic flowmeters is that the insertion of the measuring sensor reduces the pipe cross-sectional area, resulting in significant pressure loss. Therefore, they are suitable for measuring small-diameter pipes and media with low flow rates.
Straight Tube Type Electromagnetic Flowmeter
The sensor of a straight tube type electromagnetic flowmeter is installed inside the pipe, connected to the pipe, to measure the flow rate of the fluid. They offer advantages such as high measurement accuracy, good stability, and strong anti-interference performance. They are also compact and do not occupy pipe space. However, straight tube type electromagnetic flowmeters are more expensive and more difficult to maintain and install. Suitable for small and medium-diameter pipelines and demanding flow measurement scenarios.
Split-type electromagnetic flowmeter
A split-type electromagnetic flowmeter consists of a sensor and a converter. The sensor is installed inside the pipeline, while the converter is installed outside. Split-type electromagnetic flowmeters offer advantages such as easy maintenance, simple operation, and flexible installation. They also feature multiple output modes and signal processing methods, making them suitable for various flow measurement scenarios. However, a disadvantage is the need for multiple connections, which can interfere with signal transmission.
Applicable Scenarios
Insertion-type electromagnetic flowmeters are suitable for measuring small-diameter pipes and media with low flow rates, such as drinking water, bioprocessing, and industrial water. They offer easy installation, require no changes to the pipe structure, and offer high measurement accuracy and excellent stability. However, since insertion-type electromagnetic flowmeters require inserting a probe into the pipe, they have certain requirements for pipe material and are only suitable for pipes made of certain materials.
Straight-tube electromagnetic flowmeters are suitable for measuring medium- to large-diameter pipes and media with high flow rates, such as in the chemical, steel, and power industries. They offer easy installation, require no changes to the pipe structure, have high measurement accuracy, and are widely applicable. Their compact structure and lack of pipe material requirements make them widely applicable.
Split-type electromagnetic flowmeters are suitable for measuring large-diameter pipes and media with high flow rates, such as in the cement, mining, chemical, and steel industries. Split-type electromagnetic flowmeters consist of a sensor and a signal converter. The signal converter can be placed in a safe area, making them suitable for hazardous environments. Split-type electromagnetic flowmeters offer easy installation, high measurement accuracy, and a wide range of applications. However, due to their complex structure, they are relatively expensive. In general, electromagnetic flowmeters offer advantages such as high measurement accuracy, excellent stability, and a wide range of applications, meeting flow measurement needs in various fields. When purchasing an electromagnetic flowmeter, it's important to select the appropriate type and specification based on your specific needs, taking into account its advantages and disadvantages, as well as applicable scenarios, to ensure you're choosing the most suitable product.