Variable Area (VA) Flow Meters

McMenon Variable Area (VA) Flowmeters (rotameters), provide a fail-safe, cost-effective solution for measuring liquid and gas flow across various industries. Designed for precision, durability, and flexibility, our VA meters are available in metal or glass tube configurations, offering real-time visual flow rate monitoring with either a clear glass tube or an easy-to-read dial indicator.

With customisable tube lengths and tapers, our flowmeters are engineered to meet specific process fluid requirements, ensuring accurate and reliable performance. Key benefits include:

Flexible Measurement Options – Direct scale reading, standard/normal condition corrections, or ratio-based measurement along the tapered tube.
Precision & Compliance – Scales can be adjusted to match required accuracy classes with full compliance to VDI/VDE standards.
Ideal for Laboratory & OEM Applications – Affordable, high-performance flow measurement with integrated pressure and flow control via regulators and control valves.
Hazardous Area Approvals – Certified for zones 0, 1, and 2, making them suitable for demanding industrial environments.

McMenon’s VA Flowmeters are trusted globally for their efficiency, simplicity, and adaptability, delivering precise flow measurement across oil & gas, water treatment, food & beverage, pulp & paper, chemical processing, and laboratory applications.


McMenon Engineering Services Ltd
FAM540 Metal
Engineered for durability in extreme conditions, the McMenon FAM540 Metal Variable Area Flow Meter delivers reliable performance under high pressure and temperature environments. With easy installation, minimal piping requirements, and advanced diagnostics, it ensures cost-effective, precision flow measurement across a wide range of industrial applications.
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McMenon Engineering Services Ltd
FAM3200 Metal Tube
The McMenon FAM3200 Metal Tube Variable Area Flowmeter offers a durable and adaptable flow measurement solution for liquids and gases. Its compact design and short lay length make it easy to install, even in tight spaces or retrofit applications. Built for demanding environments, it excels in measuring aggressive or opaque media, providing reliable performance where glass tube meters may not be suitable due to pressure and temperature constraints.
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McMenon Engineering Services Ltd
FGM1190 Glass
The McMenon FGM1190 Glass Variable Area Flowmeter is a cost-effective and long-lasting solution for measuring clear liquids and gases across various industries. With transparent glass tubes, it allows for quick and easy flow rate visualisation, making it ideal for low flow rate applications in both laboratory and field environments. Designed for flexibility, it offers multiple measurement scale options and adjustable accuracy to meet VDI/VDE standards, ensuring reliable performance in laboratory, OEM, and process industries.
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McMenon Engineering Services Ltd
A6 Glass
The McMenon A6 Variable Area Flow Meter delivers fail-safe flow measurement for low-capacity liquids and gases, offering optimum flexibility with a compact, corrosion-resistant stainless steel body. Designed for quick, easy installation, it features snap-in tube construction and a safety-tested operator protection shield. With clear glass tubes for real-time flow visualisation and adjustable scales to meet VDI/VDE 3513 standards, the A6 is an economical, precise solution for laboratory, OEM, and process applications.
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