Wind speed sensor (frequency output)
The sensor FAR2xxxx is provided with a Robinson 3 cup rotor which rotates around a vertical axis. This element is mounted on the top of the sensor body and is joint to an internal axis which is linked to stainless steel bearings with low friction in order to increase sensor sensitivity.
Coupled to the rotation axis, an optical transducer converts the rotation rate to a digital electric signal. The frequency of the impulsive signal is proportional to rotation rate of the rotor and so to wind speed.
The sensor body is made in anticorodal aluminum, a material which guarantees a substantial durability and high resistance to corrosion, making the instrument suitable for applications in marine environments.
The sensor provides a good response over the entire range of wind speed, it is able to detecting low inten- sity of wind and high speeds up to 50 m/s (corresponding to 180 km/h).
On the bottom end of the sensor there is a connector for the signal and supply cable. The connector is watertight and has a screw connection.
For the calibration of the sensor, a certified instrument is used (reference ACCREDIA). The calibration based on comparison allows to maintain continuity with the metrological chain and assigns a scientific value to the measurement.
The sensor requires minimal maintenance: at least once a year, it is recommended to check the regular rotation of the cup-wind mill, which must take place without any particular friction, but rather with the normal smoothness of a mechanical component rotating on bearings.
Optionally, a heating set is available in order to avoid the block of the rotor due to freezing.