Home > Instruments, Solar, and Multi-Function Watches >   Kestrel 4000 Pocket Weather Tracker
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Description   The Kestrel® Tracker is the next generation of weather monitoring.  You can now measure EVERY major environmental condition, easily and accurately, right in the palm of your hand.  The chart mode allows users to recall and graph up to 250 measurements, along with the date and time of storage.  Barometric Pressure, Altitude, Density Altitude, Temperature, Humidity, Wind Speed, Wind Chill, Dew Point, Wet Bulb, and Heat Index... all in one pocket sized instrument.   Features Graph and recall trends Easy to read, backlit display Time and date Customize screens to display user-selected measurements Flip-top impeller cover allows use of other functions while protecting the impeller Automatically store measurements, even when the unit is turned off Manually store measurements with the press of a button Chart up to 250 measurements Impeller can be replaced without tools Exterior temperature, humidity, and pressure sensors for fast and accurate readings Humidity sensor can be recalibrated in the field. Includes neck and wrist lanyards, protective pouch and 2 AAA batteries Waterproof and floats. 2-year warranty Assembled in the USA US Patent Nos. 5,783,753 and 5,939,645 and 6,257,074 Features and Specifications Wind Speed Accuracy ±3% Response Time 1 second Calibration Drift <2% after 100 hours use at 7m/s Temperature Accuracy Temperature ±1°C Wind Chill ±1°C Dew Point ±2°C Heat Index ±3°C Response Time approximately 1 minute for most conditions Relative Humidity Accuracy ±3% Response Time approximately 1 minute for most conditions Calibration Drift ±2% over 24 months (can be field calibrated) Barometric Pressure Accuracy ±3hPa (between -10°C and 60°C) Calibration Drift ±1hPa over 12 months (can be field calibrated) Display Update 1 second Temperature Range Normal operation from -20°C to 60°C [-4°F to 140°F]. Below -20°C [-4°F], accurate readings may be taken by keeping the unit warmer than -20°C [-4°F] and exposing it for the minimum time necessary to take a reading (less than 1 minute). Storage Temperature -30°C to 60°C [-22°F to 140°F]. Auto Shutdown After 15 minutes of no button presses. (This feature can be disabled.) Physical Battery Two AAA alkaline batteries (included). Typical life, 400 hours. Impeller 25 mm. [1in.] diameter, sapphire bearings, light weight. User-replaceable impeller/housing assembly. Temperature Sensor Hermetically sealed precision thermistor. Humidity Sensor Solid state silicon capacitive sensor. Pressure Sensor Monolithic silicon piezoresistive sensor. Dimensions 12.7 x 4.5 x 2.8 cm. [5 x 1.8 x 1.1 in.] Weight 102 g. [3.6 oz.] Warranty Standard 2-year covers parts and labor. Specifications are are subject to change.

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