Kestrel 4000NV Weather Anemometer

The Kestrel 4000NV 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.
Kestrel takes weather monitoring to a whole new level with the 4000NV Pocket Weather Tracker. Kestrel has packed this hand-held weather tracker with the technology to monitor barometric pressure, altitude, density altitude, temperature, humidity, wind speed, wind chill, dew point, wet bulb, and heat index. No other hand-held comes close to the power and accuracy of the Kestrel 4000NV. If you are serious about the weather or need to be on top of the environmental conditions around you, this unit will never leave your side. You simply cannot find a weather tracker that measures every major environmental condition as easily and accurately as the 4000NV.

Measures
- Current wind speed
- Maximum wind speed
- Average wind speed
- Air temperature
- Water temperature
- Snow temperature
- Wind chill
- Relative humidity
- Dewpoint
- Heat stress index
- Barometric pressure
- Altitude
- Density altitude
- Wet bulb temperature

Features
- Graph and recall trends
- Easy to read, backlit display
- Time and date
- Customize screens to display user-selected measurements
- Flip-top impeller cover allows use of other functions while protecting the impeller (hard cases available.)
- Automatically store measurements, even when the unit is turned off
- Manually store measurements with the press of a button
- Chart up to 2,000 measurements
- Impeller can be replaced without tools
- Exterior temperature, humidity, and pressure sensors for fast and accurate readings
- Humidity sensor can be recalibrated in the field with our relative humidity calibration kit
- Includes neck and wrist lanyards, protective pouch and 2 AAA batteries
- Waterproof and floats
- Warranty: 5 years