Measure every major environmental condition with this powerful hand-held instrument – barometric pressure, altitude, density altitude, temperature, humidity, wind speed, wind chill, dew point, wet bulb, and heat index. Using its chart mode, the Kestrel 4000 can recall and graph up to 250 measurements, along with storage times and dates. Measurements are stored manually at the touch of a button. Measurements can also be automatically stored when the unit is turned off. You can even customize screens so that only selected measurements are displayed. Wind speed can be displayed in knots, meters per second, kilometers per hour, miles per hour, feet per minute, or Beaufort force. Temperature, wind chill, dew point, and heat index are shown in either °C or °F. Relative humidity is displayed as a percentage, and barometric pressure can be viewed in hectoPascal (mb) or inches mercury. Altitude and density altitude are displayed in meters or feet. A durable hard cover protects the impeller while allowing other functions to be used. This versatile, waterproof instrument floats, features an easy-to-read backlit display, and has an auto shutdown feature which activates after 15 minutes without a button press (feature can be disabled). Neck and wrist lanyards, protective pouch, and 2 AAA batteries included.
Five-year manufacturer’s warranty. Minimum wind speed: 0.7 mph (0.6 knots, 1 km/h, 0.3 m/s, or 59 fpm). Maximum wind speed: 89 mph (78 knots, 144 km/h, 40 m/s, or 7,877 fpm). Wind speed accuracy: ±3%. Update: 1 second. Temperature and wind chill accuracy: ±1°C. Wind chill factor resolution: ±1°C. Relative humidity accuracy: ±3% from 5% to 95%. Dew point temperature accuracy: ±2°C. Heat index accuracy: ±3°C*. Temperature resolution: ±0.1°F (±0.1°C). Barometric pressure accuracy: ±3hPa (between -10°C and 60°C). Altitude and density altitude range: -1,638 ft. to 27,420 ft. (-500 m to 9,000 m). Operating temperature: -4°F to +140°F (-20°C to +60°C). Temperature range: -20°F to +158°F (-29°C to +70°C). Accurate readings can be taken by keeping the unit warmer than -4°F (-20°C) and exposing it for the minimum time necessary (less than one minute) to take a reading. Impeller: 1" diameter, sapphire bearings, lightweight. Temperature sensor: hermetically sealed precision thermistor. Humidity sensor: solid state silicone capacitive sensor. Display: graphical LCD. Sealing: electronics enclosure IP67 water resistant to 3 ft., floats. Battery: two AAA alkaline batteries (included). Battery life: 300 hrs. Dimensions: 5" x 1.8" x 1.1".