Datalogging vane anemometer measures air volume, air flow, relative humidity (RH), and temperature, and is used by HVAC/R technicians to measure wind flow and temperature in air conditioning systems Conventional angled vane arms with low-friction ball bearing, and flexible cord for remote vane access Measures air velocity in feet per second (ft/s), and meters per second (m/s), air flow volume in cubic meters per minute (CMM) and cubic feet per minute (CFM), and dual-scale thermistor temperature sensor measures temperature in F and C Measures single-point air flow source for continuous moving average for up to two hours, up to 99 readings for multi-point sources, or up to 2,400 points with datalogging capability USB port exports data, and data hold for recording data, and minimum, maximum, and average temperature readings