When winning matters, take the Kestrel 5100 (MAVM51) for a ride. The Kestrel 5100 is just as accurate, reliable and user-friendly as the original Kestrel 4250. It 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 new Kestrel 5 Series platform adds many new features and options. If you’re familiar with the Kestrel 4500, the first thing you’ll notice is the larger, higher-resolution and contrast display and improved font readability. The Kestrel 5 series also includes a built-in dual color backlight, extra-strong polycarbonate lens and AA battery operation and offers optional LiNK iOS and Android wireless connectivity and app support. Like all Kestrel meters, the Kestrel 5100 is drop-proof, dust-proof, waterproof and able to withstand harsh environments without damage – so it can race as hard as you do, wherever you do. A range of carry pouch options makes it even easier to take your Kestrel meter with you.
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).
In addition to measuring the current environmental conditions, the Kestrel 5100 tracks and logs over 10,000 sets of time-stamped data for comparison to your actual run times later. Your data log can be transferred to a mobile device wirelessly, or to a PC with either the optional Kestrel LiNK Dongle or waterproof USB Data Transfer Cable (available separately).
Kestrels have been put to the test in some of the harshest conditions on the planet. U.S. Special Forces, combat weather teams, wildland firefighters, smoke jumpers, Mt. Everest expeditions and auto pit crews are just a few who rely on a Kestrel to provide them with the crucial environmental data they need. Watch the Weather Channel during a hurricane, and you’re sure to spot a Kestrel in action.
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.
Specification:
| Sensor | Accuracy (+/-) | Resolution | Specification Range | Notes |
| Wind Speed | Air Flow | Larger of 3% of reading, least significant digit or 20 ft/min | 0.1 m/s 1 ft/min 0.1 km/h 0.1 mph 0.1 knots 1 B* 0.1 F/S* | 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* | 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% @ 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). Wind speed calibration and testing should be done with triangle on impeller located at the top front face of the Kestrel. Measuring wind speeds above 60 m/s / 134.2 mph can damage the impeller. *F/S only in Ballistics units. Beaufort not available in Ballistics units. |
| Ambient Temperature | 0.9 °F 0.5 °C | 0.1 °F 0.1 °C | -20.0 to 158.0 °F -29.0 to 70.0 °C | 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 |
| Relative Humidity | ±2%RH | 0.1 %RH | 10 to 90% 25°C non-condensing | 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. |
| Pressure | ±1.5 mbar at 25°C, 700-1100 mbar/ ±0.044inHg at 77°F 20.67-32.48 inHg/ ±0.022 PSI 10.15-15.95 PS | 0.01 inHg 0.1 hPa|mbar 0.01 PSI | 25°C/77°F, 700-1100 mbar/20.67-32.48 inHg/10.15-15.95 PSI | Monolithic silicon piezoresistive pressure sensor with second-order temperature correction. Between 1100–1200 mbar, unit will operate with reduced accuracy. Sensor may not operate above 1200 mbar and can be damaged above 6,000 mbar or below 10 mbar. Calibration drift is negligible for the life of the product. |
| Compass | ±5° | 1° 1/16th Cardinal Scale | 0 to 360° | 2-axis solid-state magnetoresistive sensor mounted perpendicular to unit plane. Accuracy of sensor dependent upon unit’s vertical position. Self-calibration routine eliminates magnetic error from batteries or unit and must be run after every full power-down (battery removal or change). Readout indicates direction to which the back of the unit is pointed when held in a vertical orientation. Declination/variation adjustable for True North readout. |
Calculated Measurements
| Measurement | Accuracy (+/-) | Resolution | Sensors Deployed |
| Air Density | 0.0002 lb/ft3 0.0033 kg/m3 | 0.001 lbs/ft3 0.001 kg/m3 | Temperature Relative Humidity Pressure |
| Air Flow | 6.71% | 1 cfm 1 m3/hr 1 m3/m 0.1m3/s 1 L/s | Air Flow User Input (Duct Shape & Size) |
| Altitude | typical: 23.6 ft/7.2 m – 50 to 1100 mBar max: 48.2 ft/14.7 m – 300 to 750 mBar | 1 ft 1 m | Pressure User Input (Reference Pressure) |
| Barometric Pressure | 0.07 inHg 2.4 hPa|mbar 0.03 PSI | 0.01 inHg 0.1 hPa|mbar 0.01 PSI | Pressure User Input (Reference Altitude) |
| Crosswind & Headwind / Tailwind | 7.1% | 1 mph 1 ft/min 0.1 km/h 0.1 m/s 0.1 knots | Wind Speed Compass |
| Delta T | 3.2 °F 1.8 °C | 0.1 °F 0.1 °C | Temperature Relative Humidity Pressure |
| Density Altitude | 226 ft 69 m | 1 ft 1 m | Temperature Relative Humidity Pressure |
| Dew Point | 3.4 °F 1.9 °C 15-95% RH. Refer to Range for Temperature Sensor | 0.1 °F 0.1 °C | Temperature Relative Humidity |
| Evaporation Rate | 0.01 lb/ft2/hr 0.06 kg/m2/hr | 0.01 b/ft2/hr 0.01 kg/m2/hr | Wind Speed Temperature Relative Humidity Pressure User Input (Concrete Temperature) |
| Heat Index | 7.1°F 4.0°C | 0.1 °F 0.1 °C | Temperature Relative Humidity |
| Moisture Content | Humidity Ratio (“Grains”) | .3gpp .4g/kg | 0.1 gpp 0.01 g/kg | Temperature Relative Humidity Pressure |
| Relative Air Density | 0.3% | 0.1% | Temperature Relative Humidity Pressure |
| Wet Bulb Temperature – Psychrometric | 3.2 °F 1.8 °C | 0.1 °F 0.1 °C | Temperature Relative Humidity Pressure |
| Wind Chill | 1.6 °F 0.9 °C | 0.1 °F 0.1 °C | Wind Speed Temperature |
Additional Product Info
| Display & Backlight | Multifunction, multi-digit monochrome dot-matrix display. Choice of white or red LED backlight. |
| Response Time & Display Update | Display updates every 1 second. After exposure to large environmental changes, all sensors require an equilibration period to reach stated accuracy. Measurements employing RH may require longer periods particularly after prolonged exposure to very high or very low humidity. |
| Data Storage & Graphical Display, Min/Max/Avg History | Logged history stored and displayed for every measured value. Manual and auto data storage. Min/Max/Avg history may be reset independently. Auto-store interval settable from 2 seconds to 12 hours, overwrite on or off. Logs even when display off except for 2 and 5 second intervals. Kestrel 5 series units hold over 10,000 data points. |
| Data Upload & Bluetooth® Data Connect Option | Wireless range up to 100ft. Connection requires optional USB data transfer cable or Kestrel Link Dongle or Kestrel LiNK app. Employs Kestrel Link protocol for data transmission with Link supported devices. (Kestrel LiNK for iOS/Android, Kestrel Link for PC/MAC). |
| Clock / Calendar | Real-time hours:minutes:seconds clock, calendar, automatic leap-year adjustment. |
| Auto Shutdown | User-selectable – Off, 15-60 minutes with no key presses. |
| Languages | English, French, German, Spanish. |
| Certifications | CE certified, RoHS and WEEE compliant. Individually tested to NIST-traceable standards. |
| Origin | Designed and manufactured in the USA from US and imported components. Complies with Regional Value Content and Tariff Code Transformation requirements for NAFTA Preference Criterion B. |
| Battery Life | AA Lithium, included. Up to 400 hours of use, reduced by backlight or Bluetooth radio transmission use. |
| Shock Resistance | MIL-STD-810g, Transit Shock, Method 516.5 Procedure IV; unit only; impact may damage replaceable impeller. |
| Sealing | Waterproof (IP67 and NEMA-6) |
| Display & Battery Operational Temperature Limits | 14° F to 131° F | -10 °C to 55 °C Measurements may be taken beyond the limits of the operational temperature range of the display and batteries by maintaining the unit within the operational range and then exposing it to the more extreme environment for the minimum time necessary to take reading |
| Storage Temperature | -22.0 °F to 140.0 °F | -30.0 °C to 60.0 °C. |
| Size & Weight | 5.0 x 1.9 x 1.1 in / 12.7 x 4.5 x 2.8 cm, 4.3 oz / 121 g. (Lithium battery included) |
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