Kestrel 5100 Racing Weather Meter

Make those last-minute dial-in or tuning decisions count.

$286.600

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Returnable until Jan 31, 2025

Kestrel | SKU: 0851RED | Barcode: 730650001880

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Product variants

Measures

Wind Speed
Current Wind Speed
Average Wind Speed
Maximum Wind Gust
Temperature
Altitude (Barometric)
Barometric Pressure
Pressure Trend
Dew Point Temperature
Wet Bulb Temperature (Psychrometric)
Relative Humidity
Wind Chill
Density Altitude
Relative Air Density
Air Density
Moisture Content (Grains)
Heat Stress Index
Bluetooth (LiNK model)

Includes

(1) AA Lithium Battery
Instructions
Protective Draw String Pouch
Lanyard
Certificate Of Conformity (Spec Sheet)

Warranty

5 year manufacturers warranty.

US Manufacturing

The entire Kestrel line is designed and built in the USA. No other handheld weather meter is. Some electronic components have to be sourced overseas these days, but Kestrel buys American wherever possible. Kestrel believes US manufacturing is the only way to ensure that every Kestrel will do its job right. Kestrel believes it’s important to do its part to keep manufacturing alive and well in the US.

State Sales Tax Information

State sales tax not charged / collected on orders outside of Pennsylvania

Government / Education Pricing Available

Sensor Specifications

Sensor Specifications:

Wind Speed
Units of Measure:	mph \| kt \| B \| m/s \| ft/min / km/h
Specification Range:	0.6 to 40.0 m/s 118 to 7,874 ft/min 2.2 to 144.0 km/h 1.3 to 89.5 mph 1.2 to 77.8 knots 0 to 12 B* 2-131.2 F/S*
Operational Range:	0.6 to 60.0 m/s 118 to 11,811 ft/min 2.2 to 216.0 km/h 1.3 to 134.2 mph 1.2 to 116.6 knots 0 to 12 B* 2-196.9 F/S*
Resolution:	0.1 m/s 1 ft/min 0.1 km/h 0.1 mph 0.1 knots 1 B
Accuracy (+/-):	Larger of 3% of reading, least significant digit or 20 ft/min
Notes:	1 inch\|25 mm diameter impeller with precision axle and low-friction Zytel® bearings. Startup 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 startup. Off-axis accuracy -1% @ 5º off-axis; -2% @ 10º; -3% @ 15º. Calibration drift < 1% after 100 hours use at 16 MPH \| 7 m/s. Replacement impeller (PN-0801) field installs without tools (US Patent 5,783,753). Wind speed calibration and testing should be done with triangle on impeller located at the top front face of the Kestrel. *F/S only in Ballistics units. Beaufort not available in Ballistics units.
Ambient Temperature:
Units of Measure:	Fahrenheit, Celsius
Specification Range:	-20.0 to 158.0 °F -29.0 to 70.0 °C
Operational Range:	14.0.0 to 131.0 °F -10.0 to 55.0 °C
Resolution:	0.1 °F 0.1 °C
Accuracy (+/-):	0.9 °F 0.5 °C
Notes:	Airflow of 2.2 mph\|1 m/s or greater provides fastest response and reduction of insolation effect. For greatest accuracy, avoid direct sunlight on the temperature sensor and prolonged sunlight exposure to the unit in low airflow conditions. Calibration drift is negligible for the life of the product. For further details, see Display & Battery Operational Temperature Limits.
Pressure:
Units of Measure:	inHg, hPA, mb
Specification Range:	25°C/ 77°F 750-1100 hPa\|mbar 22.15-32.48 inHg 10.88-15.95 PS
Operational Range:	0.30 to 48.87 inHg 10.0 to 1654.7 hPa\|mbar 0.14 to 24.00 PSI 14.0 to 131.0 °F -10.0 to 55.0 °C
Resolution:	0.1 hPa\|mbar 0.01 inHg 0.01 PSI
Accuracy (+/-):	1.5 hPa\|mbar 0.044 inHg 0.022 PSI
Notes:	Monolithic silicon piezo-resistive pressure sensor with second-order temperature correction. Between 1100–1600 mbar, unit will operate with reduced accuracy. Sensor may not operate above 1600 mbar and can be damaged above 6,000 mbar or below 10 mbar. Calibration drift is negligible for the life of the product.
Relative Humidity:
Units of Measure:	%
Specification Range:	5 to 95% 25°C non-condensing
Operational Range:	0 to 100%
Resolution:	0.1 %RH
Accuracy (+/-):	3%RH
Notes:	To achieve stated accuracy, unit must be permitted to equilibrate to external temperature when exposed to large, rapid temperature changes and be kept out of direct sunlight. Calibration drift is typically less than ±0.25% per year.

Calculated Measurements

Altitude:
Accuracy (+/-):	typical: 23.6 ft/7.2 m - 50 to 1100 mBar max: 48.2 ft/14.7 m – 300 to 750 mBar
Resolution:	1ft 1m
Sensors employed:	Pressure User Input (Reference Pressure)
Dew Point:
Accuracy (+/-):	3.4 °F 1.9 °C 15-95% RH. Refer to Range for Temperature Sensor
Resolution:	0.1 °F 0.1 °C
Sensors employed:	Temperature Relative Humidity
Wet Bulb Temperature - Psychrometric
Accuracy (+/-):	3.2 °F 1.8 °C
Resolution:	0.1 °F 0.1 °C
Sensors employed:	Temperature Relative Humidity Pressure
Wind Chill:
Accuracy:	1.6 °F 0.9 °C
Resolution:	0.1 °F 0.1 °C
Sensors employed:	Wind Speed Temperature
Density Altitude:
Accuracy:	226 ft 69 m
Resolution:	1ft 1m
Sensors employed:	Temperature Relative Humidity Pressure
Air Density:
Accuracy:	0.0002 lb/ft3 0.0033 kg/m3
Resolution:	0.001 lbs/ft3 0.001 kg/m3
Sensors employed:	Temperature Relative Humidity Pressure
Relative Air Density:
Accuracy:	0.3%
Resolution:	0.1%
Sensors employed:	Temperature Relative Humidity Pressure
Moisture Content \| Humidity Ratio (“Grains”)
Accuracy:	3gpp .4g/kg
Resolution:	0.1 gpp 0.01 g/kg
Sensors employed:	Temperature Relative Humidity Pressure
Heat Index:
Accuracy:	7.1°F 4.0°C
Resolution:	0.1 °F 0.1 °C
Sensors employed:	Temperature Relative Humidity

Downloads:

Kestrel 5100 Manual and Complete Sensor Specifications

Description

Ensure critical dial-in or tuning decisions are accurate with Kestrel 5100 Racing Weather Meter.

The compact, portable design makes this unit easy to take right to the track

Kestrel 5100 Meter at the track The Kestrel 5100 is just as accurate, reliable and user-friendly as the original Kestrel 4250. The Kestrel 5100 measures moisture content in grains, air density, relative air density, humidity and other critical factors. Count on it for the information you need to make perfect ET predictions and performance-maximizing tuning and jetting decisions. The compact, portable design makes this unit easy to take right to the track – exactly where you need to get the most accurate and race-relevant measurements. Pair it with the optional Kestrel Vane Mount for hands-free measurements logged over the course of the day. For maximum functionality, choose a Kestrel 5100 with LiNK to transmit live measurements to the Kestrel LiNK app on your iOS or Android device up to 100’ away (line of sight).

Affordable, accurate, portable and reliable, Kestrel meters have been proven at race tracks everywhere. Put the weather on your side – put a Kestrel in your toolbox.

The 5100 with LiNK Bluetooth Connectivity, gives you the option to transfer data wirelessly to an iOS (iPhone, iPad) device or Android smartphone or tablet when within range using the appropriate app (See Below). Also with the 5100 with LiNK Meter, you can transfer data wirelessly to a Windows or Mac computer using the optional Kestrel Bluetooth USB Dongle.

Who's using the Kestrel 5100?

Bracket Racers
Drag Racers
Pit Crews
Professional Auto Racing Teams

Features:

Measures moisture content (grains), air density, relative air density (RAD), relative humidity, temperature, barometric pressure, wind speed and much more. 14 measurements in all.
Easy to read, high resolution screen (standard and NV backlit).
Time & date
Waterproof & floats
Exterior temperature, humidity & pressure sensors for fast & accurate readings
Humidity sensor can soon be calibrated in the field via cable or Dongle.
Min, Max & Average values
Automatically store measurements, when powered on or off
Manually store measurements with the press of a button
Customizable data storage - 10,000 data points
Graph & recall trends
Customize screens to display user-selected measurements
Data charting
Data upload to iOS & Android phones & tablets
Data upload to Windows or Mac computers with optional USB Data Cable
Data upload to Windows & Mac computers via wireless Bluetooth (LiNK Enabled Meters only with the optional Kestrel Dongle)
Languages: English, French, Spanish, German & Italian
User-replaceable impeller
impeller cover allows use of other functions & protecting the impeller
All instruments and accessories are completely assembled in the USA