Kestrel 4000

Price: $239.95

Please select color desired: Black ($239.95) Safety Orange ($239.95) Green ($239.95)

Quantity:

New for 2005, the Kestrel® 4000 was adapted to be more suitable for night-time activities. The Kestrel® NV units are olive drab with a visible red backlight, which helps sustain the user's natural night vision. Military personnel and pilots flying in darkness are often concerned with preserving their night vision.

It takes 30 to 45 minutes for the average eye to adapt to darkness and maximize night vision. Even a short burst of white, yellow, green or blue light “bleaches out” the rod cell photoreceptors in the eye and causes night blindness until the entire adaptation process can take place again. Light in the red spectrum does not cause this “bleaching out”, preventing night blindness and night vision fatigue. The units' red backlight is also much dimmer than a standard backlight, making it more difficult to detect with the naked eye in night operations.

Common Features:

Graph and recall trends
· Easy to read, backlit display
· Time and date
· Customize screens to display user-selected measurements
· Hard 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 with our Relative Humidity Calibration Kit.
· Includes neck and wrist lanyards, protective pouch and 2 AAA batteries
· Waterproof
· 5-year warranty
· Assembled in the USA
· US Patent Nos. 5,783,753 and 5,939,645 and 6,257,074


Full Specifications:

Wind Speed

Accuracy ±3%
Response Time 1 second
Calibration Drift <2% after 100 hours use at 7m/s
Units Display Res'n Range
Knots KTS 0.1 0.6 to 78
Meters per Second M/S 0.1 0.3 to 40
Kilometers per Hour KM/H 0.1 1.0 to 144
Miles per Hour MPH 0.1 0.7 to 89
Feet per Minute FPM 1 59 to 7877
Beaufort Force BEAU 1 1 to 16

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
Units Display Resolution Range
Celsius °C 0.1 -29 to 70
Fahrenheit °F 0.1 -20 to 158


Relative Humidity

Accuracy ±3%
Response Time approximately 1 minute for most conditions
Calibration Drift ±2% over 24 months (can be field calibrated)
Units Display Resolution Range
Percent % 0.1 5 to 95%


Barometric Pressure

Accuracy ±3hPa (between -10°C and 60°C)
Calibration Drift ±1hPa over 12 months (can be field calibrated)
Units Display Resolution Range
hectoPascal (mb) hPa 0.1 870.0 to 1080.0
Inches Mercury inHg 0.01 25.70 to 31.90


Altitude, Density Altitude

Units Display Resolution Range
Meters M 1 -500 to 9000
Feet FT 3 -1600 to 30000

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.]
*Specifications are preliminary and are subject to change

Warranty
NEW! FULL 5 YEAR WARRANTY on entire system, covering manufacturing defects.

EMAIL US AT sales@altimeters.net