Whether you're pouring concrete, balancing HVAC systems, or spraying crops, take the calculations and guess-work out of your job with the Kestrel 5200. Measures air density, air flow, air velocity, altitude, barometric pressure, density altitude, delta-T, dewpoint, evaporation rate, heat stress, humidity ratio, relative air density, relative humidity, temperature, wet bulb temperature, wind chill and CFM. Auto and manual memory stores up to 10000 data points with graphical display of data. Waterproof, floats and includes lanyard and soft carry pouch. Patented user-replaceable impeller. Quick response external thermistor. Made in USA.