Suitable for Water, Saline Water, Air, N2, H2, O2, and Natural Gases etc.
A flow rotameter is one of the most widely used instruments in industrial flow measurement. Simple in design, easy to read, and cost-effective to maintain, rotameters are trusted across hundreds of industries for measuring the flow rate of liquids and gases in real time.
A flow rotameter, also known as a variable area flow meter, measures the flow rate of a fluid by allowing it to pass upward through a tapered tube, lifting a float to a height that corresponds directly to the flow rate. The higher the float, the greater the flow.
Unlike electronic meters, rotameters require no external power source, making them ideal for remote installations and hazardous environments.
The operating principle is straightforward:
This gravity-based mechanism makes rotameters self-regulating and maintenance-friendly.
Q: What is the difference between a rotameter and a flow meter?
A: A rotameter is a type of flow meter, specifically a variable area flow meter. While all rotameters are flow meters, not all flow meters use the same working principle.
Q: Can a rotameter measure gas flow?
A: Yes, rotameters can measure both gas and liquid flow. Selection depends on fluid properties such as density and viscosity.
Q: Are rotameters accurate?
A: Typical accuracy ranges from ±1% to ±5% of full scale, depending on design and calibration.
Q: How do I choose the right rotameter?
A: Consider fluid type, flow range, pressure, temperature, and connection size before selecting a rotameter.
Q: Do rotameters need calibration?
A: Yes, periodic calibration is recommended, especially for critical measurement applications.
