Testo 410-1 - Vane Anemometer (Part number 0560 4101) Integrated, small 1.5 inch vane Hold, Min, Max, and Timed averaging Bright backlit display for easy viewing, no matter the environment Lens cover and leather belt case keep it protectedThe vane anemometers testo 410-1 and testo 410-2 offer perfect flow velocity measurement results in handy pocket format. The small, user-friendly testo 410-1 measures airflow velocity and temperature, and is suitable for fast spotchecks on ventilation outlets thanks to the integrated measurement with the 40 mm vane. A timed mean value calculation is also possible. The measuring instrument has an illuminated display, a clip-on protective cap, and a wrist strap and a belt holder ensure safekeeping.In addition to air flow velocity and air temperature, the testo 410-2 also measures air humidity. This allows air conditions to be tested reliably. In addition to this, dewpoint and wet bulb are calculated and displayed fully automatically.