Specifications:
          Power: 
            5VDC from logger (4mA from logger)
            Sensor Interface Operating Temperature: -20 to 60°C 
            Mounting: standard 1 inch (25mm) pipe 
            Size: 38 H×65Lcm, propeller 20cm 
            Weight: 0.7kg 
          Wind 
            Speed: 
            Range: 0 to 60 metres/sec (130kph) 
            Gust survival: 100 metres/sec (220kph) 
            Accuracy: speed ±0.2m/s (0.4mph) 
            Threshold: propeller 1.0m/s (2.2mph) 
            Output signal: 5.00V square wave. 3 pulses per revolution (0.098m/s 
            per Hz) 
            Required Logger Channel: 8 or 16 bit counter channel
          Wind 
            Direction 
            Range: 360° mechanical, 355° electrical (5° open) 
            Accuracy: ±3° 
            Threshold: vane - 0.5m/s (1.0mph) at 10° displacement, 0.7m/s 
            (1.6mph) at 5° displacement 
            Output signal; 0 to 2.50V, 0 to 355° 
            Required Logger Channel: analog channel
          Line 
            Driver (optional) The two channel line driver converts wind speed 
            and wind direction to separate 4-20mA signals. 
          Operating 
            temperature: -20 to 60°C 
            Output signals: 4-20mA full scale 
            Power: 12-30V dc