Kestrel 2500 Measures
Current Wind Speed
Maximum Wind Gust
Average Wind Speed
Air , Water & Snow Temperature
The Kestrel 2500 takes the great features of the Kestrel 2000 and adds in a pressure sensor. A three-hour pressure trend indicator helps you predict fish and wildlife activity and know when the weather's going to turn nasty. With its easy-to-use digital pressure altimeter , you have the perfect instrument for any outdoor activity.
In addition to predicting weather activity, barometric pressure also influences a bullet's trajectory, which is why the Kestrel 2500 is used by shooters and hunters when accuracy is important. US Olympic Rifle Champion Shooter Lones Wigger wouldn't trust any other instrument. “The Kestrel Meter is essential for target rifle shooting. It helps me win matches, and I rely on it for accurate weather information.”
Available in the Night Vison Configuration (Special Order)
Military personnel and pilots flying in darkness are often concerned with preserving their night vision. Due to overwhelming demand from our military customers, the Kestrel NV line was added in 2005.
The Kestrel 2500NV 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 greyish 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 2500 Features
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
Kestrel 2500 Includes
A slip-on protective cover
CR2032 coin cell battery (Average life 300 hours)
Kestrel Certificate of Conformity
|Units||Operational Range||Resolution||Accuracy (+/-)||Specification Range|
|m/s||0.4 to 60.0 m/s||0.1||Larger of 3% of reading or least significant digit||0.4 to 40.0 m/s|
|ft/min||59 to 11,948 ft/min||1||59 to 7877 ft/min|
|km/h||1.0 to 218.0 km/h||0.1||1.0 to 144.0 km/h|
|mph||0.8 to 135.0 mph||1||0.8 to 89.0 mph|
|knots||0.6 to 118.3 kt||0.1||0.6 to 78.0 kt|
|Beaufort||0 to 12 B||0.1||0 to 12 B|
|1 inch diameter impeller with precision axle and sapphire bearings. Off-axis accuracy -1% @ 5º off-axis; -2% @ 10º; -3% @ 15º. Calibration drift < 1% after 100 hours use at 16 MPH / 7 m/s. Sustained operation above 60 MPH / 27 m/s will wear impeller rapidly and may cause destruction of impeller. Replacement impeller (NK PN-0801) may be field-installed without tools (US Patent 5,783,753).|
|°F||-49.0 to 257.0 °F||0.1||1.8 °F||-20.0 to 158.0 °F|
|°C||-45.0 to 125.0 °C||0.1||1.0 °C||-29.0 to 70.0 °C|
|Measures air, water and snow temperature. Thermally isolated, hermetically sealed, precision thermistor mounted externally (US Patent 5,939,645). Calibration drift negligible.|
(mb & PSI 4000 model only)
|inHg||0.3 to 32.5 inHg||0.01||0.05 inHg||At 77.0 °F, 22.1 to 32.5 inHg|
|hPa / mb||10.0 to 1100.0 hPa / mb||0.1||1.5 hPa / mb||At 25.0 °C, 750 to 1100 hPa / mb|
|PSI||0.15 to 16.0 PSI||0.01||0.02 PSI||At 77.0 °F, 10.9 to 16.0 PSI|
|Monolithic silicon piezoresistive pressure sensor with second-order temperature correction. Maximum error over temperature range 32 to 158 °F (0 to 70°C) , +/- 0.06 inHg / +/-2.0 hPa. Calibration drift typically -0.03 inHg / -1.0 hPa per year. Pressure sensor may be recalibrated at factory or in field.|
|ft||-6000 to 30000 ft||1||50 ft||At 77.0 °F, <19,700 ft. Max error +/- 98 ft|
|m||-2000 to 9000 m||1||15 m||At 25.0 °C, <6,000 m. Max error +/- 30 m|
|Temperature compensated pressure (barometric) altimeter. |
|Wind Chill |
|°F||0.7 to 135.0 MPH, -49.0 to 257.0 °F||0.1||1.8 °F||1.8 to 89.0 mph, -50.0 to 50.0 °F|
|°C||0.4 to 60.0 m/s, -45.0 to 125.0 °C||0.1||1.0 °C||0.4 to 40 m/s, -45.6 to 10.0 °C|
|Calculated from the primary measurements of wind speed and temperature. Utilizes the NWS Wind Chill Temperature (WCT) Index, revised 2001, with wind speed adjusted by a factor of 1.5 to yield equivalent results to wind speed measured at 10 m above ground. (Specification temperature limits established by WCT Tables.)|
|Max/Avg Wind Speed||One-button clear and restart of Max Wind Gust and Average Wind measurement.|
|Pressure Trend||Continuously updating three-hour barometric pressure trend indicator: rising rapidly, rising, steady, falling, falling rapidly.|
|Display||Reflective 4 digit LCD. Digit height 0.36 in / 9 mm.|
|Display Update||1 second.|
|Display Backlight||Aviation green electroluminescent backlight.|
|Clock / Calendar||Real-time hours:minutes clock.|
|Operational Temperature Range|
(LCD and Batteries)
|The operational temperature range of the liquid crystal display and batteries is 14° F to 131° F / -10 °C to 55 °C. Beyond the limits of the operational temperature range, the unit must be maintained within range and exposed for minimum time necessary to take reading.|
|Storage Temperature||-22 °F to 140 °F / -30 °C to 60 °C.|
|Auto Shutdown||After 45 minutes of no key presses.|
|Certifications||CE certified. Individually tested to NIST-traceable standards (written certificate of tests available at additional charge). |
|Batteries||CR2032, one, included. Average life, 300 hours of use, +/-depending on backlight use.|
|Environmental||Waterproof (IP67 standard). Drop-tested (MIL.STD.810F; unit only. Substantial impact may damage replaceable impeller.).|
|Dimensions||Unit 4.8 x 1.7 x 0.7 in / 122 x 42 x 18 mm. Case 4.8 x 1.9 x 1.1 in / 122 x 48 x 28 mm.|
|Weight||Unit 2.3 oz / 65 g. Case 1.3 oz / 37 g.|
This sturdy padded nylon case lets you build
a Kestrel 4000 Toolkit perfect for your needs and still carry it on your
belt with ease. The top flap...
Replacement impeller for all Kestrel models.
Simply presses out, no tools required to change.
New for Spring 2008! A tripod fitted with
the same Kestrel friendly clamp as on our mini tripod. Will accommodate
any Kestrel model. Or remove the...
Clamp any Kestrel into this sturdy but lightweight
tripod to take readings in the field. The tripod?s legs extend to permit
a maximum height of 10",...
The Kestrel Portable Vane Mount is an ingeniously
simple accessory designed for extreme light weight and portability. The
Vane Mount assembles in...
This product was added to our catalog on Thursday 16 July, 2009.