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Kestrel 2500NV Pocket Wind Meter with Night Vision at $154.00 with FREE shipping, 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 grayish 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 2500NV Measures:
- Current wind speed
- Maximum wind gust
- Average wind speed
- Air, water, & snow temperature
- Wind chill
- Barometric pressure
- Altitude
Kestrel 2500NV Features:
- Current, Max and average wind speed units: m/s, km/h, mph, fpm, kts, Beaufort
- Current, Max and average wind speed accuracy: +/- 3% of reading
- Current, Max and average wind speed range: 0.8 to 135 mph, 0.4 to 60.0 m/s
- Temperature, Wind chill units: Fahrenheit or Celsius degrees
- Temperature, Wind chill accuracy: +/- 1.0 degrees Celsius, +/- 1.8 degrees Fahrenheit
- Temperature, Wind chill resolution: 0.1
Temperature, Wind chill range: -45.0 to 125.0 degrees Celsius, -50.0 to 260.0 degrees Fahrenheit
- Barometric pressure units: hPa, inHg
- Barometric pressure accuracy: +/- 1.5 hPa, +/- 0.05 inHg
- Barometric pressure resolution: 0.1 hPa, 0.01 inHg
- Barometric pressure range: 300.0 to 1100.0 hPa 8.86 to 32.48 inHg
- Altitude units: m, ft
- Altitude accuracy: +/- 15 m / 50 ft
- Altitude resolution: 1
- Altitude range: -2000 to 9000 m, -6000 to 30,000 ft
- Real-time clock
- Protective cover with sure-grip overmolding
- Data hold function
- Large easy-to-read display with backlight
- Waterproof and floats
- Innovative design for stability and accuracy in abrupt condition changes
- Patented user-replaceable impeller
- Quick response, external thermistor
- High precision pressure sensor
- Reliable, portable and easy to use
- All instruments and accessories are completely assembled in the USA
- 5 year manufacturer warranty
- User Manual
Box Contents:
- A slip-on protective cover
- Neck lanyard
- CR2032 coin cell battery (Average life 300 hours)
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