Elliptical gears are a type of positive displacement gear that has an elliptical shape rather than the traditional circular gear design.  This unique geometry allows for precise and consistent fluid measurement in flowmeters.  The elliptical gears rotate within a chamber, trapping and moving a known volume of fluid through each revolution.

Advantages of Elliptical Gears in Flowmeters

Accuracy: One of the primary advantages of elliptical gears is their high level of accuracy.  The consistent volume displacement per revolution leads to precise flow measurement, even at low flow rates.

Wide Range: Elliptical gears are capable of measuring a wide range of flow rates, making them versatile across various industries and applications.

Viscosity Insensitivity: Unlike some other flow measurement technologies, elliptical gears are relatively insensitive to changes in fluid viscosity.  This characteristic makes them suitable for measuring fluids with varying viscosities without significant calibration adjustments.

Minimal Maintenance: The design simplicity of elliptical gears contributes to their reliability and low maintenance requirements.  They are less prone to wear and tear compared to some other types of flow measurement devices.
Bi-Directional Flow Measurement: Elliptical gears can measure flow in both directions, providing flexibility in applications where reverse flow measurement is necessary.