Wind Speed Sensor 2740/2740EX A sensor for measuring the average and maximum wind speed (gust) during the sampling interval. The sensor is designed for use with Aanderaa Dataloggers 3634/3660 and the Aanderaa Automatic Weather Station 2700. Features: • Low power • Low threshold speed • High maximum speed • User friendly • SR10 output format The Wind Speed Sensor 2740 consists of a three cup rotor on top of an aluminium housing. The sensor can be fitted directly onto the Sensor Cross Arms 3415/3435 of an AADI Automatic Weather Station or used separately if a connecting cable is used. The sensor foot will fit onto a 25 mm vertical tube. The rotor bearing assembly consist of two stainless steel ball bearings in an assembly protected by a surrounding skirt. The lower end of the skirt is furnished with a magnet, and the magnet’s rotation is sensed by a magneto inductive switch located inside the housing. A micro controller reads the pulses from the magneto inductive switch sensing the rotors rotation and use the pulse count to calculate the wind speed. The sensor has two output signals; average wind speed and maximum wind speed (gust) during the sampling interval. The average wind speed is obtained as the arithmetic mean of the wind regardless of the sampling interval, provided that the sampling interval is between four seconds and three hours. The maximum wind speed is the highest speed occurring over a two second period at any time during the sampling interval. The micro controller also provides the AADI SR10 output signals for wind speed and gust. Both output signals will have the same conversion factor for calculation of wind speed in engineering units from the ten bit output data. This factor is independent of the sampling interval used. From august 1998 the sensor has been supplied with a new and more rugged three cup rotor designated 2228A.

— Stainless Steel ball bearings inductive switch Electronic board Receptacle, exterior view; pin =• ;bushing =o ■9 volts -3x^s>c4- Bridge voltage Control Voltage Signal, gust Threshold speed: Distance constant: Output signals: Current consumption Operating voltage: Calibration factor: Operating temp.: Electrical connection: Material housing: Gross weight: 1. Average Wind Speed, SR10 2 counts each rotor revolution Receptacle 2843 mating Sensor contact factory for prices i/certified sensor; Gust Adapter Cable 2911 Signal, average Bridge ground The Wind Speed Sensor has nominal calibration For previously...