Nielsen-Kellerman Offers Latest Pocket Weather Station

Kestrel 4000 Weather Tracker

The Kestrel® 4000 Weather Tracker™ (shown here actual size) is Nielsen-Kellerman's latest pocket-size weather meter, providing measurements of wind speed, temperature, wind chill, relative humidity, dew point, barometric pressure, altitude, density altitude, wet bulb temperature and heat stress, plus a clock and calendar. The weather station's memory "allows users to log the environmental data for entire trips, expeditions, outings or flights," NK says.

Nielsen-Kellerman (NK), manufacturer of the Kestrel® line of pocket weather meters, has released "the next generation of weather-monitoring instruments - the Kestrel® 4000 Pocket Weather Tracker™," the company announces. "A complete hand-held weather station," NK says, "the Kestrel 4000 measures every major environmental condition: barometric pressure, altitude, density altitude, temperature, humidity, wind speed, wind chill, dew point, wet bulb temperature and heat stress."

And the new weather meter does more than just display the current conditions. "The Kestrel 4000 is a tracking device that allows users to log the environmental data for entire trips, expeditions, outings or flights," NK points out. "The 4000's extensive memory and recall functions give anyone playing or working outdoors the ability to accurately watch and predict weather trends."

How often the unit will take regular measurements is set by using the easy-to-use customization menu, according to NK. "Once programmed, the unit 'wakes up' at the predetermined interval to measure and store all the readings," NK notes. "The data can then be reviewed in a graph with a scrolling cursor that tells the date, time and value for each reading."

The Kestrel 4000 has memory storage for 250 data points, recording up to 4 months of data, depending on the storage interval, according to NK. Other features of the 3.6-ounce Kestrel 4000 Pocket Weather Tracker include:
* Full portability
* Guaranteed accuracy specifications that ensure precise and reliable readings
* Large back-lit display for easy use in any conditions, day or night
* New humidity sensor that yields ±3% accuracy, and offers greater stability in extreme low-humidity conditions
* Unit can automatically store measurements (even when it is turned off), or you can manually store measurements with the press of a button
* Optional PC interface to upload data to a personal computer
* Flip-top impeller cover that protects the user-replaceable (without tools) 1-inch impeller while still enabling all other weather readings
* Rugged waterproof case
* Clock and calendar providing day, date and time of every reading
* Three user-defined screens that can combine readings for quick and easy reference
* Minimum/maximum/average screens that provide the historic minimum, maximum and average values for every measurement
* Automatic shutdown, either after 15 or 60 minutes of no button presses. "This feature can be disabled," NK says.
* Multiple language capability - English, Spanish and French
* Neck and wrist lanyard, soft carrying pouch and two AAA batteries are included. "Battery life is at least 400 hours," NK says.
* Assembled in the USA, with a 1-year warranty

Specifications include:
* Windspeed is measured in miles per hour (mph - range is 0.7 to 89 mph), knots (kt - range is 0.6 to 78 kt), meters per second (mps - 0.3 to 40 mps), kilometers per hour (kph), feet per minute (fpm) or Beaufort scale (Bft - a scale on which successive ranges of wind velocities are assigned code numbers from 0 to 12 or from 0 to 17).
* Temperature is measured in Fahrenheit (-20° F to +158° F) or Celsius (-29° C to +70° C), with an accuracy of ±1° C for temperature, ±2° C for wind chill, ±3° C (above 20% relative humidity) for dew point, and ±3° C for heat stress. Temperature range for normal operation is from -20°C (-4° F) to +60° C (+140° F). "Below -20° C (-4° F)," NK adds, "accurate readings may be taken by keeping the unit warmer than -20° C and exposing it for less than a minute - the minimum time necessary to take a reading."
* Relative humidity is measured in percentage (5 to 95%), with an accuracy of ±3% and a calibration drift of ±2 % over 24 months (can be field calibrated).
* Barometric pressure is measured in millibars (mb) with a range of 870.0 to1,080.0 mb, inches of mercury (inHg) with a range of 25.70 to 31.90 inHg, pounds per square inch (psi) with a range of 12.66 to 15.72 psi, or hectopascals (hPa) which is a measurement in hundreds of pascals (1 pascal is equal to 1 newton per square meter). Accuracy of the barometric pressure measurement is ±3 hPa (between -10° and +60° C).
* Altitude and density altitude are measured in feet (range is -1,500 to +30,000 feet) or meters (range is -500 to +9,000 meters) with an altitude accuracy of ±30 meters (98.4 feet) at standard atmospheric conditions, and a density altitude accuracy of ±75 meters (246 feet).
* Dimensions are: 12.7 by 4.5 by 2.8 centimeters (5 by 1.8 by 1.1 inches).

Retail price of the Kestrel 4000 Weather Tracker pocket weather meter is $329, "available at national retail and catalog outlets or directly from NK," Nielsen-Kellerman notes.

"Nielsen-Kellerman is known worldwide for waterproof speed measurement, timing and audio systems for competitive rowers," the company says. "Virtually every rowing shell at the 2000 Olympic games in Sydney, Australia carried NK equipment."

- Buzz Chalmers

Info: Nielsen-Kellerman, 104 W. 15th St., Dept. UF, Chester, PA 19013.
Phone: (610) 447-1555 * Fax: (610) 447-1577 * e-mail: This e-mail address is being protected from spam bots, you need JavaScript enabled to view it .