IMPORTANT NOTE: This standalone wind sensor fan does not include an anemometer. It must be paired with the BT-856A or BT-846A anemometer for accurate measurements. - Original Air Flow Sensor: This replacement USB wind sensor is designed specifically for the BT-846A and BT-856A Pro HVAC CFM meters. Simply plug the sensor into the main unit, and it is ready for immediate use. - Low Friction Impeller: Equipped with a low friction impeller, this sensor can detect wind speeds as low as 0.001 mph, ensuring precise readings even in calm conditions. - Wide Measurement Range: The sensor offers an impressive wind speed range of 0.001 to 100 mph, with an accuracy of +/- 3% plus 0.2 reading. It also features a temperature measurement range of 32.0 to 113.0 ℉ (0 to 45℃), providing a resolution of 0.1. Applications: - HVAC Professionals: Ideal for technicians who need to measure airflow in heating or cooling systems accurately, ensuring optimal performance and energy efficiency. - Environmental Monitoring: Useful for researchers or enthusiasts monitoring wind conditions for outdoor activities or studying local climates. - Industrial Settings: Perfect for engineers assessing airflow in manufacturing processes or ventilation systems to maintain safety and efficiency. This wind sensor is built for durability and reliability, making it a critical tool for professionals in various fields. Ensure you have the right equipment for accurate and effective wind measurement.