Kestrel 4000NV Pocket Weather Tracker- Tan
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Kestrel 4000NV Pocket Weather Tracker- Tan Overview
The Kestrel 4000 NV measures every environmental condition simply with the press of a button! This unit 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. The US Military relies on the Kestrel NV Weather Meters to remain as tough as their operations.
Kestrel 4000NV Pocket Weather Tracker- Tan Feature
- Pocket weather tracker with backlight designed to preserve night vision
- Measures such data as barometric pressure, altitude, temp, humidity, and more
- Chart mode lets users recall and graph up to 2,000 measurements with date and time
- Backlight's optical filter reduces overall brightness and minimizes blue and green light
- Prevents night blindness and night-vision fatigue; weighs 0.5 pounds; 5-year warranty
Kestrel 4000NV Pocket Weather Tracker- Tan Specifications
Military personnel and pilots flying in darkness are often concerned with preserving their night vision. In response, Kestrel created the 4000NV pocket weather tracker, which works just like the company's standard weather trackers but with a night-vision-preserving backlight. The 4000NV is designed to easily and accurately help you measure every major environmental condition right from the palm of your hand, including barometric pressure, altitude, density altitude, temperature, humidity, wind speed, wind chill, dew point, wet bulb, and heat index, all in a single pocket-sized instrument. Furthermore, the unit's chart mode lets users recall and graph up to 2,000 measurements, along with the date and time of storage, and then upload the data to a PC with the optional Kestrel interface.
Durable? You bet. The 4000NV has been subjected to impact, water submersion, and extreme temperature tests, yet keeps on working. U.S. Special Forces, combat weather teams, firefighters, smoke jumpers, Mt. Everest expeditions, and IRL pit crews are just a few of the people who rely on a Kestrel 4000NV 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 being wielded by an intrepid on-screen meteorologist.
The major difference between the 4000NV and Kestrel's other weather trackers is the NV's backlight, which incorporates an optical filter to reduce overall brightness and minimize blue and green spectrum light to preserve night vision. Plus, 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 in a soft grayish pink, not red, and is still in the visible spectrum. Note that the NV is not compatible with night-vision equipment.
Why would a user need night-vision protection? In general, 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, however, does not cause this "bleaching out," preventing night blindness and night vision fatigue. The 4000NV is potentially useful for dozens of professions, from wild-land firefighters putting their lives on the line to kite surfers looking for the perfect play conditions. The night-vision line is particularly appropriate for the military, aviators, overnight hikers, professional rescue services, and other personnel who often work in the dark.
The 4000NV offers a number of additional features, including custom screens to display user-selected measurements; five language options; a flip-top impeller cover that lets you use other functions while still protecting the impeller; a waterproof, floatable housing; and customizable data storage. The 4000NV measures 1.8 by 5 by 1.1 inches (W x H x D), weighs only 0.5 pounds, and carries a five-year warranty.
