Product Description
Kestrel 2500 Weather Meter
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The Kestrel 2500 Handheld Weather Meter measures wind and temperature with total accuracy, and has the added benefits of an air pressure sensor that provides altitude and barometric information. Kestrel 2500 technology enables you to follow changes in air pressure that help predict impending changes in the weather. Factor in the 2500’s digital altimeter, and you have most of the weather information you need for outdoor activities ranging from model airplane flight to rifle practice. A quick compare chart of the basic models shows you the differences between several Kestrel models.
As with all Kestrels, the 2500’s sensitive and user-replaceable impeller technology provides accurate wind speed info. Additionally, an external temperature sensor and waterproof casing allow you to gauge the temperature of water and snow, as well as the open air. A hard slide-on case, lanyard, and battery are included.
The Kestrel 2500 was originated as a basic model for long range shooters at an affordable price and someone who didn’t need the ballistic features built in like the 5700 Elite or any others in the Kestrel Ballistics Line of meters. A simple video shows how to achieve station pressure with a Kestrel 2500.
For those using it at night, the Olive Drab NV version of the Kestrel 2500 features a night-vision preserving backlight. This backlight incorporates an 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.)
Features Kestrel 2500 Wether Meter
- Real-time clock
- Protective cover with sure-grip over molding
- Data hold function
- Large easy-to-read display with white backlight (or soft red backlight on the NV model)
- Waterproof to IP67 Standards (Can be submerged up to 3’/1M for up to 30 minutes)
- 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
Specifications Kestrel 2500 Wether Meter
| Primary Measurement | Units | Resolution | Accuracy (+/-) | Range: Max Operational Specification (if less) |
Notes |
| Wind Speed or Air Velocity |
m/s | 0.1 | Larger of 3% of reading, least significant digit or 20 ft/min | 0.6 to 60.0 m/s 0.6 to 40.0 m/s |
1 inch diameter impeller with precision axle and low-friction Zytel® bearings. Start-up speed stated as lower limit, readings may be taken down to 0.4 m/s | 79 ft/min | 1.5 km/h | .9 mph | .8 kt after impeller start-up. Off-axis accuracy -1% @ 5° off-axis; -2% @ 10° -3% @ 15°. Calibration drift < 1% after 100 hours use at 16 MPH | 7 m/s. Replacement impeller (NK PN-0801) field installs without tools (US Patent 5,783,753). |
| ft/min | 1 | 18 to 11,811 ft/min 118 to 7,874 ft/min |
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| km/h | 0.1 | 2.2 to 216.0 km/h 2.2 to 144.0 km/h |
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| mph | 0.1 | 1.3 to 134.2 mph 1.3 to 89.5 mph |
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| knots | 0.1 | 1.2 to 116.6 knots 1.2 to 77.8 knots |
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| Beaufort | 1 | 0 to 12 B | |||
| Temperature | °F | 0.1 | 1.8 °F | -49.0 to 257.0 -20.0 to 158.0 |
Air, water or snow temperature. Hermetically-sealed, precision thermistor mounted externally and thermally isolated (US Patent 5,939,645) for rapid response. Airflow of 2.2 mph | 1 m/s or greater provides fastest response and reduction of insulation effect. Calibration drift negligible. |
| °C | 0.1 | 1.0 °C | -45.0 to 125.0 -29.0 to 70.0 |
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| Pressure | inHg | 0.01 | typical 0.04 inHg max 0.07 inHg |
0.30 to 32.48 inHg | Air pressure at the location. Adjustable reference altitude allows display of station pressure or barometric pressure corrected to MSL. Monolithic silicon piezoresistive pressure sensor with second-order temperature correction. Pressure sensor may be recalibrated at factory or in field. Kestrel 2500 and 3500 display continuously updating three-hour barometric pressure trend indicator: rising rapidly, rising, steady, falling, falling rapidly. Kestrel 4000 series displays pressure trend through graphing function. |
| hPa (mb) | 0.1 | typical 1.5 hPa max 2.5 hPa |
300.0 to 1100.0 hPa 10.0 to 1100.0 hPa | ||
| Wind Chill | °F | 0.1 | 1.8 °F | Refer to stated ranges for wind speed and temp. | Perceived temperature resulting from combined effect of wind speed and temperature. Calculated based on 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. |
| °C | 0.1 | 1.0 °C | |||
| Altitude | ft | 1 | typical 50 ft max 98 ft |
-2,300 to 85,000 ft | Height above Mean Sea Level (“MSL”). Temperature compensated pressure (barometric) altimeter requires accurate reference barometric pressure to produce maximum absolute accuracy. |
| m | 1 | typical 15 m max 30 m |
-700 to 25,900 m | ||
| Max/Avg Wind | One-button clear and restart of Max Wind Gust and Average Wind measurement by powering down and restarting unit. | ||||
| Display & Backlight | Reflective 5 digit LCD. Digit height 0.36 in / 9 mm. Choice of aviation green or visible red (NV models only) electroluminescent backlight. Manual activation with auto-off. | ||||
| Response Time & Display Update | All measurements except those based on relative humidity respond accurately within 1 second. Relative humidity and all measurements which include RH in their calculation may require as long as 1 minute to fully equilibrate to a large change in the measurement environment. Display updates every 1 second. | ||||
| Clock / Calendar | Real-time hours:minutes clock. | ||||
| Operational & Storage Temperature Range | The operational temperature range of the liquid crystal display and batteries is 14° F to 131° F / -10 °C to 55 °C. Measurements beyond the operational range can be taken by briefly exposing unit to extreme conditions such that the display and batteries remain within the operational range. Storage range -22 °F to 140 °F / -30 °C to 60 °C. | ||||
| Auto Shutdown | After 45 minutes of no key presses. | ||||
| Certifications | CE certified, RoHS and WEEE compliant. Individually tested to NIST-traceable standards (written certificate of tests available at additional charge). | ||||
| Battery | CR2032, one, included. Average life, 300 hours. Battery life reduced by backlight use in 2000 to 3500 models. | ||||
| Environmental | Waterproof (IP67 and NEMA-6). MIL-STD-810F, Transit Shock, Method 516.5 Procedure IV; unit only; impact may damage replaceable impeller. | ||||
| Size & Weight | 4.8 x 1.9 x 1.1 in / 12.2 x 4.8 x 2.8 cm, 3.6 oz / 102 g (including slip-on cover). | ||||
Includes:
- Battery – 1 x CR2032
- Certificate Of Conformity (Spec Sheet)
- Lanyard
- Protective Cover – Hard Slip-on
Kestrel 2500 – Datasheet
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