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The Kestrel 3500NV has the same features as his more colorful counterpart, but is olive drab with a visible red backlight, which helps sustain the user's natural night vision. Military personnel and pilots flying in darkness are often concerned with preserving their night vision. 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. The units' red backlight is also much dimmer than a standard backlight, making it more difficult to detect with the naked eye in night operations.
The Kestrel 3500NV is a very fully featured pocket weather meter - it quickly and easily provides all the environmental data that the top-of-the-line Kestrel 4000 does, except for Density Altitude. The 3500NV scrolls through the current reading of 9 different environmental conditions, and is a great option for someone who needs the ability to measure a wide variety of environmental conditions, but doesn't need the data storage, graphing, or computer interface options found in the 4000 model.
This model includes all the functionality of the 3000 model, plus a great 3-hour pressure trend indicator, several additional environmental variables, and a clock feature.
Measures
- Current Wind Speed
- Maximum Wind Gust
- Average Wind Speed
- Air, Water & Snow Temperature
- Wind Chill
- Relative Humidity
- Dewpoint
- Heat Stress Index
- Barometric Pressure
- Altitude
- Wet Bulb Temperature
Features
- Measure environmental conditions quickly and accurately
- Forecast weather with pressure trend indicator
- Reliable, portable and easy to use
- Innovative humidity sensor designed for stability and accuracy in abrupt condition changes
- Thermally adjusted humidity sensor
- Patented user-replaceable impeller
- Quick response, external thermistor
- High precision pressure sensor
- Real-time clock
- Protective cover with sure-grip overmolding
- Data hold function
- Large easy-to-read display with backlight
- Waterproof and floats
- Lanyard and battery included
- Warranty: 5 years
- Humidity sensor can be recalibrated in the field with our Relative Humidity Calibration Kit
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