The Kestrel 4500 Pocket Weather Tracker is a complete weather instrument, offering all the features of the Kestrel 4000 with instant and accurate measurement of wind speed, temperature, humidity and barometric pressure and numerous other derived functions.

In addition, the Kestrel 4500 has a built in digital compass. This allows you to track and log wind direction as well as wind speed. The wind direction is displayed in degrees and cardinal compass points. This makes the Kestrel 4500 the required model for HAZMAT teams, flight crews and military personnel as well as paragliders, flying enthusiasts and kite boarders who need to understand the impact of crosswind, headwind and tailwind.

By setting a reference target or runway heading, the Kestrel 4500 will automatically calculate crosswind, headwind and tailwind when measuring the wind speed.

The digital compass can also be used to display forward heading with reference to either magnetic or true north.

Coupled with the Kestrel Vane Mount and Mini Tripod the Kestrel 4500 becomes a full data-logging weather station measuring the slightest of breezes. All items are easily portable and can be set up in seconds.

At the touch of a button environmental conditions are clearly shown in digital or graphical form. Individual functions can be displayed in three different formats: current, minimum/maximum/average and chart. There are also three user screens, which can be customised to simultaneously display the three most appropriate functions for the application.

The Kestrel 4500 can be set up to log data automatically (as well as manually) at programmable intervals, in order to display a history of weather information. Graphs display up to 2900 data points and the value, time and date of capture point can be shown.

The stored data can also be uploaded to a PC, for analysis/storage with the optional Kestrel Interface and Communicator software. With the Bluetooth® model, data may be streamed live via Bluetooth wireless technology.

High precision Zytel® bearings and a lightweight impeller provide accurate air flow measurements and the ability to operate at speeds as low as 0.6 m/s. The impeller is user-replaceable in case of damage, also ensuring high accuracy levels are maintained for life. An integral flip-open hard cover protects the impeller when not in use.

A precision external thermistor sensor provides fast response temperature readings and accuracy of +/- 1°C. The 0.1 degree resolution of the display aids in determining when a consistent reading has been reached. A special housing protects the relative humidity sensor from contamination providing an accuracy of +/-3%. A monolithic silicon based pressure sensor enables barometric pressure and altitude to be calculated, with a resolution of 0.1mbar and 1m respectively.

The combination of the Kestrel 4500 Pocket Weather Tracker’s multiple sensors result in the following derived functions: wind chill, heat index, dew point, wet bulb temperature and density altitude.

For those with after dark requirements, the Kestrel 4500NV (with an olive drab case) is available with a low intensity red backlight to preserve night vision.

The Kestrel 4500 is powered by two easily replaceable, AAA batteries and has two power saving modes to prolong battery life. All text can be displayed in one of several languages including: English, French, Italian, Spanish or German.

Kestrel 4500 measures

• Current wind speed
• Average wind speed
• Maximum wind speed
• Wind direction
• Crosswind
• Headwind/tailwind
• Temperature
• Wind Chill
• Heat index
• Dew Point
• Relative Humidity
• Barometric pressure
• Altitude
• Density altitude
• Wet bulb temperature
• Digital compass
• Time & Date

Choice of measurement units

• kt, m/s, km/h, mph, ft/min, Beaufort
• º, cardinal points
• ºC, ºF
• %
• mbar, inHg, hPa, psi
• m, ft

Accuracy

• Speed ±3% of reading or ±0.1m/s
• Direction ±5º
• Crosswind, headwind, tailwind ±5%
• Temperature ±1ºC
• Relative humidity ±3%
• Dew point ±2ºC
• Barometric pressure ±1.5mbar

Operational Range

• Speed 0.6 to 60 m/s
• Direction 360º
• Crosswind, headwind, tailwind 0.6 to 60 m/s
• Temperature -45 to +125ºC
• Relative humidity 0 to 100%
• Barometric pressure 10 to 1100mbar

Specification Range

• Speed 0.6 to 40 m/s
• Direction 0 to 360º
• Crosswind, headwind, tailwind 3.8 to 40 m/s
• Temperature -29 to +70ºC
• Relative humidity 5 to 95%
• Barometric pressure 750 to 1100mbar

Available options:

• NV model
• Bluetooth model

Kestrel 4500 features: What makes a Kestrel Unique?

• Multifunction instrument
• Graphical three-line displays
• Data capture up to 2900 readings
• Minimum/maximum/average values
• User defined screens
• Language selection
• Compact, rugged design
• High accuracy
• High precision axle and low-friction Zytel® bearings
• User-replaceable impeller
• Fast response temperature sensor
• Easy to read back-lit display
• NV version in olive drab or desert tan has red backlight
• Hard cover protects impeller
• Runs from 2 AAA batteries
• Data upload (with optional PC interface or integrated Bluetooth wireless technology)
• Available in yellow, olive drab or desert tan
• 5 year warranty

Typical applications

• Field studies
• Meteorology – small, portable weather station
• Target shooting