Rotating-vane thermo-anemometer that simultaneously displays air velocity and air temperature on a dual LCD, with a low-friction 2.8 in vane rated for speeds up to roughly 6900 fpm (35 m/s) and temperatures from 14-122F. Calculates air volume (CFM), logs Min/Max/Average readings, and can hold continuous averaging runs for up to two hours, drawing power from a single 9V battery. This NIST version adds a traceable calibration certificate with full data and uncertainty values.