The anemometers are broadly divided into two categories:
Pressure Anemometers
Velocity Anemometers
As the name suggests, one measures the pressure of the wind and the other the velocity. Modern technology allows the instruments to provide both the measurements. The pressure and velocity anemometers are further sub divided into the following categories:
Pressure Anemometers
- Cup anemometers: This is an anemometer with a vertical axis and three cups for capturing the wind. The number of revolutions of the cups per minute is registered electronically. The wind speed is directly proportional to the rate of the rotation of the cups and thus is the wind speed measured.
- Windmill anemometers
- Hot-wire anemometers
- Laser Doppler anemometers: The wind velocity is measured through a beam of laser light. The speed of the air molecule in front of the beam of light is calculated to measure the wind speed.
- Sonic anemometers: The velocity of the wind is measured through ultra sonic sound effects in this weather instrument.
- Plate anemometers
- Tube anemometers
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