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Ultra Sensitive, Low Friction Bearings and Precision Engineered Aluminum Impellar Make Wind Speed Indicator Possible

From sailors to scientists, kite flyers to foresters, pilots to golfers, everyone's talking about the new Kestrel 1000 and 2000. Nielsen-Kellerman Company of Chester, PA recently released both new products to an eager marketplace, thanks to the design help of Bird Precision. Wind speed indicators have been around for many years, but an extremely lightweight and highly accurate digital one had remained elusive to manufacturers until Nielsen-Kellerman went to the drawing board. Other indicators previously on the market have often been cumbersome analog devices weighing more than one pound and only moderately accurate at best.

Nielsen-Kellerman's goal was a new hand-held anemometer less than five inches long and weighing only 1.5 ounces, yet delivering extreme accuracy. They approached Bird Precision of Waltham, MA to help in the design of an ultra sensitive, low friction jewel bearing and shaft. Bird Precision rose to the challenge, delivering super polished sapphire conical vee bearings, chosen for their ultra low coefficient of friction, which is better than 0.15 against steel. Sapphire is next to diamond in wear resistance, and was also chosen for its long life.

These bearings allow the Kestrel's precision engineered anodized aluminum impeller to register almost imperceptible breezes (0.7 MPH), yet also measure gale force winds (up to 89 MPH) with an accuracy of 3% or better. The 25 mm patented impeller is protected from damage by a sturdy fiberglass housing, but if necessary, can be replaced simply and inexpensively by the user without tools. Bird Precision's accurate bearing has provided a cost effective solution to Nielsen-Kellerman's problem with improved results.

Both the Kestrel 1000 Pocket Wind Meter and the Kestrel 2000 Wind Speed/Temperature/Wind Chill indicator are designed for use by anyone who works or plays outdoors, or in the case of the Kestrel 2000, anyone who needs an accurate and reliable thermo-anemometer for technical applications. Both products are being marketed to sailors, general aviation pilots, sky divers, balloonists, HVAC technicians, kite flyers, farmers, foresters, golfers, archers, meteorologists, and others in need of portable, accurate wind speed measuring capabilities. The digital display offers settings for knots, meters per second, kilometers per hour, miles per hour, feet per minute, and Beaufort.

Bird Precision of Waltham, MA creates synthetic ruby and sapphire bearings in a wide variety of shapes and sizes. They also manufacture precise orifices ranging in size from .0008" to .0350" that can be produced in high volume with extreme accuracy. Their products have been used in a variety of applications and industries, including medical equipment and instruments, OEM applications, aerospace equipment, transportation engines and parts, recreational products and many others


Paul Bailio
Bird Precision
One Spruce Street
P.O. Box 540569
Waltham, MA 02454
800-370-6308 (fax)


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