Kestrel 4500NV Pocket Weather Tracker, Desert Tan More discount Kestrel 4500NV Pocket Weather Tracker, Desert Tan sale now, Best buy Kestrel 4500NV Pocket Weather Tracker, Desert Tan low price. Limit time offer! Kestrel 4500NV Pocket Weather Tracker, Desert Tan
 Amazon.com Military personnel and pilots flying in darkness are often concerned with preserving their night vision. In response, Kestrel created the 4500NV pocket weather tracker, which works just like the company's standard weather trackers but with a night-vision-preserving backlight. The 4500NV 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. The 4500NV also goes the extra mile by measuring wind direction with its built-in digital compass, in addition to calculating crosswind and headwind/tailwind with reference to a user-set target heading. It then stores the information along with all the other environmental readings in its 1,400-data-point memory. Pair the 4500NV wind meter with Kestrel vane mount and you have a data-logging weather station that sets up in seconds and rotates in the slightest of breezes. Durable? You bet. The 4500NV 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 4500NV 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 4500NV 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 4500NV 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 4500NV offers a number of additional features, including a multifunction three-line display; an automatic and manual data logger; a humidity sensor that can be recalibrated in the field with the Relative Humidity Calibration Kit (sold separately); exterior temperature, humidity, and pressure Features
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