The Testo 410-2 Handheld Vane Anemometer (0560 4102) measures air flow, air temperature, and humidity quickly, easily, and accurately. The compact testo 410-2 air and humidity meter is ideal for fast comfort spot checks and timed averaging calculation. The testo 410-2 handheld anemometer with humidity is  both accurate and affordable. Good things do come in small packages.  This air and humidity meter is simple to use and feature packed. The testo 410-2 velocity and humidity instrument has the same superior vane sensor technology found in Testo’s comprehensive line of vane anemometers. Combine that with reliable temperature and humidity measuring, and you've got the primary comfort measurements in the palm of your hand.  As an added benefit, this handheld anemometer with humidity measurement calculates dew point and wet bulb.