Specification Brand : TOPINCN BulletPoint1 : [3 Wind Cup Structure]: Made of imported ABS material, the wind speed part adopts the traditional three wind cup structure, ensuring high strength and good startup. BulletPoint2 : [Robust Construction]: Withstand harsh weather conditions and operate in temperatures ranging from -35℃ to 60℃. Comes with a 5M power cord for easy use and installation. BulletPoint3 : [High Accuracy]: Accurate processing unit outputs with large range, good linearity, and stable reliability, meeting various user demands. BulletPoint4 : [Professional Design]: Equipped with accurate angle sensors and low-inertia wind vane, the wind direction changes can be easily observed with no dead angle, providing high accuracy and stability. BulletPoint5 : [Versatile Wiring Options]: Four installation methods compatible with different wiring requirements, making it easy to install and use. ExternallyAssignedProductIdentifier : 7671832988694 ItemName : Tower Crane Anemometer, 3 Fan Blades Alarm Wind Speed Meter Tower Crane Intelligent Alarm Anemometer High Accuracy Smart Wind Speed Aspirator Pumps ItemPackageDimensions_Height : 16 centimeters ItemPackageDimensions_Length : 35 centimeters ItemPackageDimensions_Width : 27 centimeters ItemTypeKeyword : science-lab-anemometers Manufacturer : TOPINCN Material1 : Acrylonitrile Butadiene Styrene (ABS) Material2 : Aluminum ModelName : TOPINCNakr0tcbs2u ModelNumber : TOPINCNakr0tcbs2u NumberOfItems : 1 PartNumber : TOPINCNakr0tcbs2u ProductDescription : Spec: Item Type: Wind Sensor Weight: 1598g / 56.4oz Material: ABS, Galvanized, Aluminum Widely Used in: Meteorology, Marine, Environment, Airport, Harbor, Laboratory, Industry, Agriculture and Transportation, etc. Output: RS485 Cable Length: Approx. 5M / 16.4ft Measuring Range Wind Speed: 0-70m/s Power Supply: DC 9-30V Output Serial port: RS485 (default protocol) Accuracy: Wind speed: ± (0.3 + 0.03V) m / s (V represents the real-time wind speed value) Wind Direction: ± 3 Degree Resolution: Wind speed: 0.1m/s, Wind direction: 1 Degree Start Up Wind Speed: ?0.5m/s Maximum Power Consumption: 0.9W Load Capacity: DC12V power supply, current type output impedance ?350? DC24V power supply, current type output impedance ?900? Voltage Type Output Impedance ?1K? Working Environment: Temperature -35?-60 Humidity ? 100%without condensation Grade: IP64 Cable Rating: Rated voltage 300V 80? Calculation formula Wind Speed Pulse type: F=0.5 + 0.101xM Wind speed and direction current type 4-20mA: F=(I-4)/16xA+B 0-20mA: F=I/20xA+B Voltage type for wind speed and direction 0-2.5V: F=V/2.5xA+B 0-5V: F=V/5xA+B 1-5V: F=(V-1)/4xA+B F: Indicates the wind speed or direction sensor value, m/s or degree; M: Number of pulses in 1 second; I: Sensor output current value, mA; V: sensor output voltage value, V; A: Sensor range width (upper range limit minus lower limit); B: sensor range minimum (lower range limit); For example: wind speed sensor range of 0-70m/s, then: A = 70, B = 0 Wind direction range of 0-359 degree, then A = 359, B = 0 Black: A+ Yellow: B- Green: Power negative