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Kestrel 4500 Pocket Weather Meter - Olive Drab Night Vision

5.0 out of 5 stars 1 customer review

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  • UPC: 730650045006
  • Weight: 0.400 lbs
1 new from $643.18

Product Description

Product Description

4500 Pocket Weather Meter - Olive Drab Night Vision Part #: 0845NVOLV The Kestrel 4500 Pocket Weather Tracker is Kestrel's flagship meter. Capable of monitoring and reporting an exhaustive list of environmental parameters - from temperature to barometric pressure, dewpoint, wind chill, and more**, the Kestrel 4500 is the most feature-rich pocket weather meter in the entire Kestrel catalog. In addition to the Kestrel 4000's extensive list of capabilities, the Kestrel 4500 has these distinct monitoring functions: Digital Compass Wind Direction Crosswind Headwind/Tailwind These added features make the 4500 the Kestrel Meter of choice for military professionals, HAZMAT teams, and flight crews. Like all the pocket weather meters in the Kestrel 4000 series, the Kestrel 4500 is capable of storing and charting up to 1400 data points for later analysis. For military professionals, the Olive Drab NV version of the Kestrel 4500 features a night-vision preserving backlight. Backlight incorporates optical filter to reduce overall brightness and minimize blue and green spectrum light to preserve night vision. (Note: This backlight appears soft greyish pink, not "red", and is still in the visible spectrum, so is not compatible with night-vision equipment.) For military professionals, the Olive Drab NV version of the Kestrel 4500 is equipped with a red night vision backlight. The backlight appears as a subdued, almost white-pink hue. This is not an issue with the meter - this is how the light is designed for optimal performance in low-light conditions. Weekend shooters and military snipers alike have been calling for a Kestrel Meter with crosswind calculation for years - and the Kestrel 4500 meets that demand completely. The elite Kestrel 4500 has the most complete list of features in the entire Kestrel Meter family, with the only absent elements being the airflow and humidity ratio measurements available with the Kestrel 4200 Air Flow Tracke


Military personnel and pilots flying in darkness are often concerned with preserving their night vision. In response, Kestrel created the 4500NV pocket weather tracker, which works just like the company's standard weather trackers but with a night-vision-preserving backlight. The 4500NV is designed to easily and accurately help you measure every major environmental condition right from the palm of your hand, including barometric pressure, altitude, density altitude, temperature, humidity, wind speed, wind chill, dew point, wet bulb, and heat index, all in a single pocket-sized instrument. The 4500NV also goes the extra mile by measuring wind direction with its built-in digital compass, in addition to calculating crosswind and headwind/tailwind with reference to a user-set target heading. It then stores the information along with all the other environmental readings in its 2,900-data-point memory.

Pair the 4500NV wind meter with Kestrel vane mount and you have a data-logging weather station that sets up in seconds and rotates in the slightest of breezes. Durable? You bet. The 4500NV has been subjected to impact, water submersion, and extreme temperature tests, yet keeps on working. U.S. Special Forces, combat weather teams, firefighters, smoke jumpers, Mt. Everest expeditions, and IRL pit crews are just a few of the people who rely on a Kestrel 4500NV to provide them with the crucial environmental data they need. Watch the Weather Channel during a hurricane and you're sure to spot a Kestrel being wielded by an intrepid on-screen meteorologist.

The major difference between the 4500NV and Kestrel's other weather trackers is the NV's backlight, which incorporates an optical filter to reduce overall brightness and minimize blue and green spectrum light to preserve night vision. Plus, 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 in a soft grayish pink, not red, and is still in the visible spectrum. Note that the NV is not compatible with night-vision equipment.

Why would a user need night-vision protection? In general, 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, however, does not cause this "bleaching out," preventing night blindness and night vision fatigue. The 4500NV is potentially useful for dozens of professions, from wild-land firefighters putting their lives on the line to kite surfers looking for the perfect play conditions. The night-vision line is particularly appropriate for the military, aviators, overnight hikers, professional rescue services, and other personnel who often work in the dark.

The 4500NV offers a number of additional features, including a multifunction three-line display; an automatic and manual data logger; a humidity sensor that can be recalibrated in the field with the Relative Humidity Calibration Kit (sold separately); exterior temperature, humidity, and pressure sensors for fast and accurate readings; graph and recall trends; a flip-top impeller cover that lets you use other functions while still protecting the impeller; and a waterproof, floatable housing. The 4500 NV--which comes with a soft carrying pouch, a neck lanyard, and two AAA batteries--measures 1.8 by 5 by 1.1 inches (W x H x D), weighs only 0.5 pounds, and carries a five-year warranty.

4500NV Measurements

  • Heading (true and magnetic)
  • Wind direction
  • Crosswind
  • Headwind/tailwind
  • Altitude
  • Pressure trend
  • Barometric pressure
  • Wet bulb temperature
  • Relative humidity in percentage
  • Heat stress index
  • Dew point
  • Wet bulb temperature
  • Density altitude
  • Wind chill
  • Air, water, and snow temperature in F or C
  • Current, average, and maximum air velocity

About Nielsen-Kellerman
Nielsen-Kellerman (NK) was founded in 1978, after Richard Kellerman--a physical chemist at Xerox--was recruited by a crew coach to develop a product that would simplify the coxswain's many jobs on the river. With the collaboration of Xerox associate Paul Nielsen, Kellerman set out to create a unit that combined the tasks of an amplifier, stroke meter, and timer. The Cox Box amplifier idea came to Kellerman after watching a coxswain run his crew into a bridge during a regatta. In 1984, NK expanded its product line to include the original Stroke Coach stroke meter, designed to let scullers and straight boats know their stroke rate and time. Following the success of the Stroke Coach, NK designed the Chronostroke rate and stopwatch for rowing coaches, and developed and manufactured the original monitor for the Concept II rowing machine. In 1996, the company expanded into a completely new product line by launching a line of wind and weather instruments called Kestrel pocket weather meters. In the ensuing years, NK moved into and out of a facility in Chester, Pennsylvania, and eventually landed in Boothwyn, Pennsylvania. The company now specializes in three broad product lines: rowing and sports monitoring instruments, pocket weather meters, and soaring instruments for cross-country soaring pilots.

Product Details

  • Product Dimensions: 6 x 3 x 2 inches ; 6.4 ounces
  • Shipping Weight: 8.8 ounces
  • ASIN: B00488AP4G
  • Item model number: 0845NVOLV
  • Average Customer Review: 5.0 out of 5 stars  See all reviews (1 customer review)
  • Amazon Best Sellers Rank: #965,914 in Sports & Outdoors (See Top 100 in Sports & Outdoors)
  • Product Warranty: For warranty information about this product, please click here

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I recently purchased this for a field exercise. I had my doubts as to whether it could stand up to the abuse and perform as described. It is worth every cent! Not only did it perform well, it is definitely rugged enough for regular field use. All of the readings were accurate and no major calibration was needed between missions or after travel. Humidity was spot on as well as elevation. Our air force contingent was actually using a Kestrel 4000 for our weather reading, but couldn't see it at night very well, so I let him borrow mine after dark. The night vision is actually easier to read than I expected. A low backlight illuminates the readings. User screens were very helpful. A great product and perfect for weather enthusiast or for those who need something dependable.
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