Reliable flow measurement for demanding applications
The McMenon FAM540 Metal Variable Area Flowmeter is built for performance in some of the most demanding industrial environments. Designed to handle high operating pressures and extreme temperatures, this flowmeter is a trusted solution for industries such as oil and gas, chemical processing, power generation, and many other process-critical sectors.
Engineered with durability and flexibility in mind, the FAM540 offers accurate flow measurement for a wide range of liquid and gas applications. Its robust metal construction ensures long-term reliability, even in corrosive or high-risk environments, while delivering consistent, repeatable results. Whether it’s installed on a production platform, in a processing plant, or within an energy facility, the FAM540 is a dependable choice for monitoring and control.
Ease of installation is a key advantage of the FAM540. Unlike many traditional flowmeters, it does not require long straight piping runs upstream or downstream, allowing for integration into space-constrained or retrofit systems. Combined with its low initial cost and straightforward installation, the FAM540 offers a cost-effective solution that does not compromise on performance or quality.
The FAM540 also includes an intelligent converter that adapts to changing process conditions, helping to maintain measurement accuracy and improve overall process control. Additionally, it features integrated diagnostics aligned with NAMUR NE107, providing operators with valuable insights into instrument health and system performance.
Available in a variety of materials and pressure ratings, the FAM540 can be tailored to suit specific application requirements. With hazardous area approvals and a design focused on efficiency, safety, and long-term value, the McMenon FAM540 delivers exceptional performance where it matters most.
Sizing and selection is simplified by use of McMenon Solve, the ultimate tool for DP flowmeter sizing and more, used on-line
or off-line and available to download now

Special features
- Tube diameter ranges from 1/2” to 3” Accuracy classes: ±1.6% (acc. to VDI/VDE 3513-2)
- Reproducibility: 0.25% of measured value
- Rangeability: (10:1 turndown)
- Analog indicator with transmitter 4 to 20 mA, with or without LCD indicator Gas damping option to prevent compression oscillation
- Stainless steels housing
- Heat jacketing design
- Easy installation
- High & Low flow alarm
- Special design available for Hygienic service
Applications
- Apparatus engineering
- Food, beverage & pharmaceutical industries
- Water treatment systems and chemical industries
- Oil & Gas
- Power plants
- Petrochemical
- Steel plants
- Furnace gas measurement
- Air or cooling water