Variable Area Rotameter Acrylic Flow Meter
Instrava’s acrylic body variable area flow meters provide an ideal balance of cost efficiency, measurement accuracy, and wide flow range availability. Designed to cover applications from microflow to larger flow rates, these variable area rotameters offer a practical solution for many industrial flow measurement needs.
The flow meter features a one-piece transparent acrylic body with PVC or metal process fittings, ensuring durability while allowing clear visual observation of flow conditions. A large, easy-to-read scale with additional reference marks improves readability and reduces interpretation errors during operation.
Low flow models use an inherently stable float design, while higher flow models incorporate a float stabilization mechanism for enhanced indication stability. Many models are available with or without integrated control valves, combining accuracy, value, and low cost in a compact and reliable flow measurement solution.
Flow Meter Description
Acrylic Body Variable Area Flow Meters Features
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Clear, high-contrast scales for fast and accurate flow reading
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Compact and lightweight design for easy installation in limited spaces
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Durable acrylic body with robust fittings for long-term operation
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Cost-effective flow measurement solution for standard industrial applications
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Metric scales available as standard or optional configuration
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Air sampling and gas analysis equipment
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Aquaculture and water treatment systems
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Desalination and filtration processes
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Medical and laboratory equipment
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OEM and skid-mounted systems
Variable Area Rotameter Application Scenarios
The variable area rotameter (acrylic flow meter) is widely used for visual flow monitoring in systems requiring simple, reliable, and cost-effective flow indication. Typical applications include:
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Air sampling and gas analysis systems
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Aquaculture and water treatment processes
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Desalination and filtration systems
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Medical and laboratory equipment
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Chemical dosing and fluid handling systems
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OEM equipment and skid-mounted assemblies
Flow Meter Parameter
Model: INAR115 (Customizable)
| Item | Specification |
|---|---|
| Measuring Medium | Liquid / Gas |
| Measuring Range – Liquid | ml/min: 6–60, 8–80, 30–120, 40–400 (custom ranges available) GPH: 10–70, 16–160, 25–250, 80–400, 100–500, 100–600, 200–800, 100–1000 |
| Measuring Range – Gas | L/min: 0.05–0.5, 0.1–1, 0.2–2, 0.25–2.5, 0.6–6, 1–4, 1–5, 1–10, 1–12 0.1–0.8, 0.1–1.5, 0.3–3 0.4–4, 0.5–8, 1–5, 1–12, 2–10, 2–20, 3–15, 3–30, 4–20, 5–25, 6–30 m³/h: 0.05–0.25, 0.04–0.4 |
| Scale Type | Metric scale (custom calibration available) |
| Regulator / Valve Option | With regulating valve / Without regulating valve |
| O-ring Material | Silicone rubber / Fluorocarbon rubber (FKM) / Nitrile rubber (NBR) |
| Connector Material | ABS / PP / PVC / Brass / Chrome-plated brass / Stainless steel |
| Installation Orientation | Vertical |
| Customization | Flow range, scale calibration, valve option, sealing material, connector material |
Instrava OEM/ODM
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What is a variable area rotameter used for?
A variable area rotameter is used for visual measurement of liquid or gas flow in pipelines and process systems. It is commonly applied where simple, reliable, and cost-effective flow indication is required without external power or electronic output.
Can an acrylic flow meter measure both liquid and gas?
Yes. Acrylic flow meters can be designed and calibrated for liquid or gas measurement. The flow range, float design, and scale are selected according to the medium to ensure stable and accurate indication.
How do I select the correct flow range for a rotameter?
The recommended operating flow should fall within 30–70% of the full scale of the rotameter. Selecting a proper flow range improves reading stability and measurement repeatability while avoiding float saturation at high flow.
Are variable area rotameters suitable for corrosive media?
Acrylic rotameters can handle mildly corrosive media by selecting compatible body materials, connectors, and sealing O-rings such as PP, PVC, or fluorocarbon rubber. Material compatibility should always be verified for specific chemical applications.
Do acrylic variable area flow meters require power supply or signal output?
No. Acrylic variable area flow meters operate on a purely mechanical principle and do not require electrical power, wiring, or signal output. Flow is indicated directly by the float position on the scale.
What installation conditions are required for accurate rotameter measurement?
Variable area rotameters should be installed vertically with upward flow. Proper vertical alignment and stable mounting are essential to ensure correct float movement and accurate flow indication.
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