Overview
For years our customers have been asking for wind
direction along with wind speed. The Kestrel 4500
does just that with its built in digital compass. But it doesn’t
stop there. It also calculates crosswind and headwind/tailwind
with reference to a user-set target heading, and stores the information along with all the other environmental readings
in its 1400 data point memory.
Pair the 4500 Wind Meter with the Kestrel
Vane Mount and you have a data-logging
weather station that sets up in seconds and rotates in the slightest
of breezes. Did we mention that the whole kit is the ultimate
in portability? It packs down into a 2 x 6 inch pouch and weighs
under 8 ounces.
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 4500NV is available with an Olive
Drab case or a Desert
Tan case. The 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.
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.
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