Kestrel 5500AG Agriculture Weather Meter
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Agricultural production necessitates data specific to each location's indoor climate and outdoor conditions.
The Kestrel 5500AG is your comprehensive meter for condition monitoring and record keeping on the farm, ranch, or in the field. The Kestrel 5500AG provides you with data for risk identification, environment assessments, and action plan development. This meter includes THI, compass for direction and Delta T, an additional measurement to aid spraying applications.
Get the environmental data you need for livestock and crop production and other farm and ranch activities. This lightweight, handheld, multi-function meter can be used inside and out for barn/facility condition assessments to spraying decisions where both wind speed and direction must be recorded. This comprehensive meter will deliver spot measurements, log and store data, and aid in auditing and record keeping. The Kestrel 5500AG is easily carried in a pocket or glove box and is ready to help whenever and wherever needed. Its rugged build and waterproof case mean it can work as hard as you do. Be prepared: be informed of local and micro-climate environments at your site.
Clip the Kestrel 5500AG into the optional Kestrel 5 Series Rotating Vane Mount and you have a sturdy weather station that can be left in place for days or weeks.
Spray Management:
The Kestrel 5500AG provides Delta T measurements to aid in assessing acceptable spraying conditions and ensure you're within guidelines. Based upon ambient temperature and dew point, Delta-T provides guidance on the evaporation rate of sprayed chemicals to help you select the right spray nozzle. The compass provides direction to minimize spray drift. The Kestrel 5500AG calculates and logs on-site Delta T, wind speed, and direction without any additional user input. When combined with the Kestrel’s average wind and max wind gust measurements, agriculture professionals can ensure they spray safely, every time. Use an accessory carry pouch to keep your Kestrel handy on your belt, ready to go before any spraying operations. Spraying with Dicamba can be harmful if it drifts to a neighbors crop. With the Kestrel 5500AG, you can log important data including wind speed, direction and Delta T. You can also email data logged with the Kestrel 5500AG with LiNK, and the Kestrel LiNK app for your smartphone.
Heat Stress Management with THI:
THI, (Temperature-Humidity Index) has been used for decades as a measure to classify heat stress risk in many livestock production and transportation operations. This measurement includes both temperature and relative humidity and is a basis for both strategic and tactical management practices which benefit animal health, productivity and well-being. The Kestrel 5500AG calculates and logs on-site THI based on user selection of either the NRC(National Research Council, 1971) or Yousef(Yousef, 1985) accepted THI calculations. Objective and accurate site-specific measurements are critical to ensuring a heat stress management strategy that is cost effective; and they're at your fingertips with the 5500AG.
Barn / Housing Ventilation Assessments:
Regardless of the type of barn/house design all livestock require proper ventilation and air movement to maximize health, growth, and comfort. The Kestrel 5500AG provides wind speed and air flow measurements to quickly quantify air movement in the vicinity of livestock, locate drafts, measure fan effectiveness and confirm duct discharge velocity. Volume air flow takes duct shape and dimensions into account and allows for accurate comparison of various locations in a system. No calculator is needed to determine airflow with the Kestrel 5500AG – a few quick menu picks and built-in averaging gives you accurate readings instantly.
Microclimate, Harvest and Storage Conditions:
Many livestock professionals also grow and store grains, hay and other feedstuffs. The Kestrel 5500AG can measure micro-climates around the farm to determine where mold and disease may be a problem, ensuring conditions are right for harvesting, drying, and storage. Leave the Kestrel 5500AG in place anywhere in the field, barn or greenhouse to get a graphical history of overnight conditions, (the Kestrel 5 Series Rotating Vane Mount and a ¼-20 camera clamp or tripod makes it easy).
Choose Kestrel LiNK Option to add the power of Apps:
LiNK is Kestrel’s wireless data communication system, powered by Bluetooth® low energy. Choose the Kestrel 5500AG with LiNK option and you get full iOS, Android, PC and Mac app support. See real-time readings on your phone or tablet on a customizable dashboard up to 100’ away (line of sight). Download stored data from your Kestrel to save or share it. Plus, you can update the firmware on your Kestrel when improvements are released.
Note: Bluetooth® low energy is built into all recent iOS and Android devices. PC and Mac connectivity require purchase of a Kestrel LiNK USB Dongle. Non-LiNK units can be connected to PC’s and Mac’s, but NOT phones and tablets, using the Kestrel USB Data Cable.
Features:
- Rugged (drop tested to MIL-STD-810G standards – 10 drops from 4’).
- Waterproof and dustproof (sealed to IP67 standards – 30’ submersion to 3’).
- Small – carry in your pocket or store in your glove box.
- High visibility case to avoid loss.
- Large, hi-res, hi-contrast, graphic display is perfectly readable in the brightest sunlight and is backlit for use in low-light conditions.
- Airflow impeller can be field-replaced without tools if damaged – patented!
- Protective pouch, neck lanyard and Lithium AA battery included.
- 5-year warranty.
- Handheld, portable, data logger with on-screen graphing and measurement statistics.
- Optional LiNK connectivity powered by Bluetooth® low energy provides wireless communication to mobile devices and computers.
- Kestrel COC regarding accuracy of measurements
- User-Replaceable Impeller
| MEASUREMENTS | DROP D2AG | 5000AG | 5500AG | 5400AG |
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| Temperature | yes | yes | yes | yes |
| Relative Humidity | yes | yes | yes | yes |
| Heat Stress Index | yes | yes | yes | yes |
| Temperature-Humidity Index (THI) | yes | yes | yes | yes |
| Dew Point Temp. | yes | yes | yes | yes |
| Wind Speed/Air Speed | yes | yes | yes | |
| Wind Chill | yes | yes | yes | |
| Wet Bulb Temp. (Psychrometric) | yes | yes | yes | |
| Station Pressure (Absolute Pressure) | yes | yes | yes | |
| Barometric Pressure | yes | yes | yes | |
| Altitude | yes | yes | yes | |
| Density Altitude | yes | yes | yes | |
| Volume Air Flow | yes | yes | ||
| Wind Direction | yes | yes | ||
| Crosswind / Headwind / Tailwind | yes | yes | ||
| Delta T | yes | yes | ||
| Globe Temp. | yes | |||
| Naturally Aspirated Wet Bulb Temp. | yes | |||
| Wet Bulb Globe Temp. (WBGT) | yes | |||
| Heat Load Index (HLI) | yes | |||
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Sensor Specifications
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Wind Speed |
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| Units of Measure: | mph | kt | B | m/s | ft/min / km/h |
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| 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. |
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Ambient Temperature |
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| Units of Measure: | Fahrenheit, Celsius |
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| 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. |
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Pressure |
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| Units of Measure: | inHg, hPA, mb |
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| 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. |
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Relative Humidity |
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| 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. |
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Compass |
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| Units of Measure: | Compass Heading in True or Magnetic |
| Specification Range: | 0 to 360° |
| Operational Range: | 0 to 360° |
| Resolution: | 1° 1/16th Cardinal Scale |
| Accuracy: | ±5° |
| Notes: | 2-axis solid-state magneto resistive 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
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Altitude |
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Dew Point |
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Wet Bulb Temperature - Psychrometric |
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Wind Chill |
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Density Altitude |
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Heat Index |
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Air Flow |
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THI (NRC) |
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THI (Yousef) |
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Delta T |
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