Kestrel 4400BT

Wet Bulb Globe Temperature (WBGT) Thermal Work Limit (TWL) Globe Temperature Naturally Aspirated Wet Bulb Temperature Wind Speed (Current, Average, & Maximum) Altitude Pressure trend Barometric pressure Relative humidity in % Heat stress index Dewpoint Wet bulb temperature Density altitude Wind chill Air, water, and snow temperature °F or °C Waterproof and floats Time and date Easy- to-read backlit display Data Logger (automatic and manual) Customizable data storage 2900 data points Humidity sensor can be calibrated in the field with our Relative Humidity Calibration Kit Customize screens to display user-selected measurements Graph and recall trends User-replaceable impeller Data charting Upload to a computer (with optional interface) Meets MIL-STD-810F 516.5 Procedure IV Transit Shock test 20 drops from 5 ft. IP-67 sealed to exclude dust and water at 3 ft. submersion Five languages (English, French, Spanish, German, and Italian) US Patent Nos. 5,783,753 and 5,939,645 and 6,257,074 Made in the USA > Each Units Include Batteries 2 AAA Kestrel Portable Vane Mount Belt carry case Neck lanyard Kestrel Certificate of Conformity A chart with suggested Heat Stress warning zones