Kestrel 3500


Kestrel 3500NV

The Kestrel 3500NV 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 3500 Measures:
• Barometric Pressure
• Pressure Trend
• Relative Humidity
• Heat Stress Index
• Dewpoint
• Wet bulb temperature
• Wind Chill
• Air, Water & Snow Temperature
• Current Wind Speed
• Maximum Wind Gusts
• Average Wind Speed

Features:
• Real-time clock
• Data hold function
• Waterproof and floats
• Large, easy-to-read display with backlight
• High precision pressure sensor
• Quick-response, external themistor
• Forecast weather with pressure trend indicator
• Humidity sensor can be recalibrated in the field with our Relative Humidity Calibration Kit
• Patented user-replaceable impeller
• Reliable, portable and easy to use
• Protective cover with sure-grip overmolding
• All instruments and accessories are completely assembled in the USA
• 5 year warranty

Includes:
• A slip-on protective cover
• Neck lanyard
• CR2032 coin cell battery (Average life 300 hours)
• Certificate of Conformity