• Rugged, handheld, portable weather station with onboard data logging and graphing; senses wind speed, temperature, humidity and pressure and displays up to 16 total measurements on large, clear LCD.
• Options include case color, Bluetooth® wireless data transfer and standard or red night vision preserving backlight.
• Waterproof (IP-67), floats, drop-tested to standards (MIL-STD-810G), patented.
• Includes soft pouch, neck lanyard, 2 Energizer° Ultimate Lithium AAA batteries and 5-year warranty.
• Used in firefighting, hazardous materials response, meteorology, , law , research, education, scientific expeditions and more.

The baseline wind and weather meter in the Kestrel 4000 series, the Kestrel 4000 Pocket Weather Tracker has all the wind and weather monitoring functions available with the Kestrel 3500 Wind Meter, plus the distinct advantage of data storage, graphing functions, and computer interface technology. With these additional options you will be able to record changes in the weather over time, view these changes as graphs on your Kestrel 4000's display, and even upload the data to your PC or Mac with the Kestrel Interface. The Kestrel 4000 accurately measures: * Wind Chill * Air, Water, and Snow Temperature (displayed in Fahrenheit or Celsius w/ accuracy of +/-1 degree) * Current, Average, and Maximum Wind Speed (displayed in Beaufort Wind Scale; Knots; MPH; KPH; or Feet Per Minute) * Barometric Pressure * Pressure Trend * Altitude * Relative Humidity * Dewpoint Temperature * Wet Bulb Temperature * Heat Stress Index * Density Altitude * Customizable navigation and data displays * Tracking and storage of up to 2000 data points (manual and automatic data storage; graphing) * Computer interface capability Features: * Waterproof and floats * Time and date * Easy-to-read, backlit display * Exterior temperature, humidity, and pressure sensors for fast and accurate readings * Humidity sensor can be recalibrated in the field in the field with the Kestrel Relative Humidity Calibration Kit. * Minimum, maximum, and average values * Automatically store measurements, even when the unit is turned off * Manually store measurements with the press of a button * Customizable data storage - 2000 data points * Graph and recall trends * Customize screens to display user-selected measurements * Data charting * Data upload (with optional interface) * Five languages (English, French, Spanish, German, and Italian) * Patented, user-replaceable impeller (no tools needed) * Ultralight impeller is ed in jewel bearings for precision, wide range of speeds and low startup speed * Impeller is shock-ed in a glass-reinforced plastic housing * Flip-top impeller cover allows use of other functions while protecting the impeller * US Patent Nos. 5,783,753 and 5,939,645 and 6,257,074 * All instruments and accessories are completely assembled in the USA * Actual size: 5.0 x 1.8 x 1.1 inches (size without case) * Power: 2 AAA batteries (average life of 400 hours) All Kestrel Pocket Weather Meters are made in the USA and covered by a 5-year warranty against manufacturing defects. Additionally, every single Kestrel manufactured is calibrated for every single value, either directly against NIST-traceable standards or against an intermediary standard that is calibrated daily. What's in the Box? Kestrel 4000, soft carry pouch, wrist/neck lanyard, 2 AAA batteries, Kestrel Certificate of Conformity