ABB FEP321 Electromagnetic Flowmeter

ABB FEP321 is a ProcessMaster electromagnetic flowmeter designed for industrial liquid flow measurement applications where stable performance, accurate measurement and flexible installation are required. As a remote mount flowmeter solution, the FEP321 separates the sensor and transmitter, allowing the measuring unit to be installed directly in the process line while the transmitter can be positioned in a more convenient location for operation, monitoring and maintenance.

The ABB ProcessMaster FEP321 series uses electromagnetic measurement technology based on Faraday’s law of electromagnetic induction. This measuring principle allows the instrument to provide accurate flow measurement without introducing mechanical moving parts into the measuring tube. The design makes the device suitable for a wide range of conductive liquid applications in industries such as water treatment, chemical processing, energy, pulp and paper, and general industrial automation.

Product Overview

ABB FEP321 belongs to the ProcessMaster FEP300 family of electromagnetic flowmeters. The remote transmitter configuration provides installation flexibility for process environments where direct mounting is not practical. The sensor is installed in the pipeline, while the transmitter is connected through a signal cable, allowing operators to place the display and control interface at an accessible location.

The FEP321 model supports different nominal sizes, process connection options and material combinations to meet various application requirements. According to the ABB technical documentation, the ProcessMaster FEP321 series supports nominal sizes from DN 3 to DN 2000, with different flange standards available depending on configuration requirements. The flowmeter can be configured with different lining materials including hard rubber, soft rubber, PTFE, PFA and ETFE, providing compatibility with different process media.

Measurement Principle and Performance

The ABB FEP321 electromagnetic flowmeter operates using electromagnetic induction technology. When a conductive fluid passes through the magnetic field generated inside the sensor tube, a voltage signal proportional to the flow velocity is produced. The transmitter processes this signal and converts it into a standardized output signal for industrial control systems.

This measurement method does not require any internal moving components, reducing mechanical wear and improving measurement stability over long operating periods. The flowmeter is designed for applications where reliable measurement of conductive liquids is important, with a minimum conductivity requirement depending on the specific application conditions.

The standard measurement accuracy of the FEP321 series can reach approximately ±0.4% of measured value, with an optional higher accuracy configuration available for applications requiring improved measurement performance. This makes the device suitable for process control systems that require consistent flow monitoring.

Technical Features

• Electromagnetic flow measurement technology for conductive liquids
• Remote mount sensor and transmitter configuration
• Wide selection of lining materials for different process conditions
• Multiple electrode materials for application flexibility
• Support for industrial process flange connections
• Protection classes including IP65, IP67 and IP68 depending on configuration
• Graphical display with configurable parameters
• Standard HART communication capability
• Programmable current, pulse and contact outputs

Process Connection and Material Options

ABB FEP321 provides flexible configuration possibilities through different process connection materials and sensor construction options. The available process connection materials include steel and stainless steel options, allowing the flowmeter to be adapted to different installation environments.

The electrode selection includes stainless steel 316Ti, 904L stainless steel, Hastelloy materials, platinum-iridium, tantalum and titanium options. These material choices allow engineers to select suitable electrode designs according to chemical characteristics, corrosion resistance requirements and process conditions.

The lining material is an important factor in electromagnetic flowmeter selection because it directly contacts the measured medium. ABB FEP321 supports various lining solutions including PTFE, PFA, ETFE and rubber lining options. Different materials provide different levels of chemical resistance, temperature capability and application suitability.

Remote Mount Design Advantages

The remote mount structure of ABB FEP321 provides additional installation flexibility compared with compact flowmeter designs. In applications where pipeline conditions, temperature limitations or accessibility requirements affect transmitter placement, the separate transmitter configuration allows engineers to optimize installation layouts.

The sensor and transmitter communicate through a dedicated signal connection. Depending on configuration, the signal cable length can support extended installation distances, making the FEP321 suitable for large industrial facilities where measurement points and control rooms are located separately.

Applications

ABB FEP321 is widely used in industrial process measurement applications requiring reliable liquid flow monitoring. Typical applications include water and wastewater treatment systems, chemical production processes, cooling water circulation systems, industrial utility monitoring, pulp and paper processing and energy-related facilities.

Because electromagnetic flowmeters do not contain moving measurement components, they are particularly suitable for applications involving liquids with particles or varying process conditions where traditional mechanical flow measurement technologies may face limitations.

Integration with Industrial Automation Systems

The ABB FEP321 transmitter supports standard industrial communication and output functions, allowing integration with automation systems, distributed control systems and supervisory monitoring platforms. The available 4–20 mA current output, pulse output and programmable contact functions provide flexible connection methods for different control architectures.

The graphical display interface allows operators to configure parameters and monitor measurement information directly. Combined with HART communication capability, the flowmeter can support easier commissioning, configuration and process monitoring in modern industrial environments.

Conclusion

ABB FEP321 is a flexible electromagnetic flow measurement solution designed for industrial applications requiring accurate and stable liquid flow monitoring. Its remote mount structure, multiple material options, configurable transmitter functions and wide application range make it suitable for complex process environments.

With ProcessMaster technology, ABB FEP321 provides a reliable measurement platform for industrial automation systems where precise flow information is essential for efficient process control and operation management.