The Kestrel 3500 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.
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.
Current Wind Speed
Maximum Wind Gust
Average Wind Speed
Air, Water & Snow Temperature
Heat Stress Index
Wet Bulb Temperature