The TA640A High Accuracy Digital Anemometer is a professional handheld air velocity measuring instrument, also known as a digital anemometer, handheld wind speed meter, air flow meter, air velocity tester, or wind speed measuring device. Equipped with a high-sensitivity vane sensor, it provides fast and stable measurement of airflow velocity while simultaneously monitoring ambient temperature for efficient field inspection and analysis. With a 0.3～30.0m/s wind speed measurement range, the TA640A supports five selectable wind speed units including m/s, km/h, ft/m, mile/h, and knots, while temperature measurement supports ℃/℉ conversion to meet different international measurement requirements. The instrument features data hold, maximum/minimum value recording, backlight display, and automatic power-off functions, making it ideal for portable testing and routine maintenance applications. The TA640A digital anemometer is widely used in HVAC system commissioning, air duct velocity testing, ventilation system inspection, building air circulation analysis, industrial factory airflow monitoring, fan and blower performance testing, power plant ventilation inspection, wind energy equipment maintenance, petrochemical facilities, underground warehouse ventilation checks, aviation ground wind measurement, outdoor weather monitoring, environmental airflow testing, and laboratory airflow measurement. Whether used for building acceptance testing, equipment installation and adjustment, industrial environment optimization, or daily equipment maintenance, the TA640A handheld anemometer provides a reliable solution for accurate air velocity and temperature measurement.