The Kestrel 4000 Pocket Weather Tracker allows you to take instant accurate readings of environmental conditions whenever and wherever you are. At the touch of a button important weather information is clearly shown in digital or graphical form.

Ideal for construction workers, engineers, sailors, flyers, farmers and those who love the outdoors, the Kestrel 4000 offers a multitude of features to help you monitor your environment in one single instrument.

For those with after dark requirements, the Kestrel 4000NV (with an olive drab or desert tan case) is available with a low intensity red backlight.

Individual functions can be displayed in 3 different formats: current, minimum/maximum/average and chart. There are also 3 user screens, which can be customised to simultaneously display the 3 most appropriate functions for the application.

The Kestrel 4000 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 4000 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 (+/-3% of reading) 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 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 0.1mb and 1m respectively.

The combination of the Kestrel 4000’s multiple sensors result in the following derived functions: wind chill, heat index, dew point and density altitude.

The Kestrel 4000 Pocket Weather Tracker 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 4000 measures

• Current wind speed
• Average wind speed
• Maximum wind speed
• Temperature
• Wind Chill
• Relative Humidity
• Heat index
• Dew Point
• Wet bulb temperature
• Barometric pressure
• Altitude
• Density altitude
• Time & Date

Choice of measurement units

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

Accuracy

• Speed ±3% of reading or ±0.1m/s
• Temperature ±1ºC
• Relative humidity ±3%
• Dew point ±3ºC
• Barometric pressure ±1.5mbar
• Altitude ±15m

Operational Range

• Speed 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
• Temperature -29 to +70ºC
• Relative humidity 5 to 95%
• Barometric pressure 750 to 1100mbar

Available options:

• NV model
• Bluetooth model

Kestrel 4000 features: What makes a Kestrel Unique?

• Multifunction instrument
• Graphical three-line displays
• Data capture up to 4000 readings
• Minimum/maximum/average values
• User defined screens
• 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
• Language selection
• Runs from 2 AAA batteries
• Data upload (with optional PC interface or integrated Bluetooth wireless technology)
• Available in grey, olive drab, desert tan or safety orange

Typical applications

• Agriculture – checking conditions prior to crop spraying or burning
• Aviation – gliders, para-gliders, micro-lights, parachutists and ballooning
• Construction – site safety, working conditions, working at height in cranes or access vehicles
• Education – air flow experiments, environmental studies, outdoor sports
• Heating and ventilation – air flow through fans, checking condition of filters
• Industry – air flow measurements, pollution control
• Science – aerodynamics, environmental science and meteorology
• Fire fighters – checking fire spreading hazard
• Outdoor activities – sailors, walkers, model boats/air craft, kite flyers, archery, shooting, fishing, golf & athletics