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Kestrel® 4000 Pocket Wind Meter
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Overview
In 2000, we introduced the Kestrel 4000 Pocket Weather Tracker, and today it is still the most comprehensive pocket weather meter on the market. For just under 4 ounces, you get every environmental reading with the press of a single button. The 4000 is unparalleled in its ease of use and totally customizable navigation and data display. In addition to measuring the current conditions, it tracks and stores up to 2000 sets of data, and data can be uploaded to a PC with the optional Kestrel Interface.
Durable? You bet. The 4000 has been subjected to impact, water submersion and extreme temperature tests, and keeps on working. Kestrel 4000’s have been put to the test in some of the harshest conditions on the planet. U.S. Special Forces, combat weather teams, wildland firefighters, smoke jumpers, Mt. Everest expeditions and IRL pit crews are just a few who rely on a Kestrel 4000 to provide them with the crucial environmental data they need. Watch the Weather Channel during a hurricane, and you’re sure to spot a Kestrel 4000 being wielded by an intrepid on-screen meteorologist.
Due to popular demand in a range of applications, the Kestrel 4000 is available in Gray, Olive Drab, and Safety Orange.
Available in the NV
Configuration
Military personnel and pilots flying in darkness
are often concerned with preserving their night vision. Due to overwhelming demand from our military customers,
the Kestrel NV line was added in 2005.
The Kestrel 4000NV has a night-vision preserving backlight which helps users to sustain natural night vision. The NV's backlight incorporates an optical filter to reduce overall brightness and minimize blue and green spectrum light to preserve night vision. Additionally, NV backlights are also much dimmer than a standard backlight, making it more difficult to detect with the naked eye in night operations. This backlight appears soft greyish pink, not red, and is still in the visible spectrum, so is not compatible with night-vision equipment.
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.
 
Kestrel 4000 Measures
Kestrel 4000 Features
- Waterproof and floats
- Easy to read, backlit display
- Time and date
- 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.
- 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)
- User-replaceable impeller
- 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
- 5-year warranty
Kestrel 4000 Includes
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K4000 User Instruction Manual 
