Measure volume air flow without a calculator

The Kestrel 4200 Pocket Air Flow Tracker has been designed for HVAC applications, allowing instant and accurate readings of air flow and environmental conditions whenever and wherever you are.

Ideal for HVAC, health & safety, facilities and maintenance engineers, the Kestrel 4200 offers a multitude of features to help monitor your environment in one single instrument – right in the palm of your hand.

The Kestrel 4200 combines all the features of the Kestrel 4000 and Kestrel 4100 (no longer available) and also makes the HVAC technicians job even easier with built-in wet bulb temperature and humidity ratio readings.

The Kestrel 4200 features automatic volume air flow readings. Simply enter the duct shape and dimensions, hold the Kestrel 4200 in the air stream and the volume air flow readings are displayed – no calculator required! With the convenient averaging mode, you can be sure the volume air flow readings are accurate in any airflow or duct size and shape.

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 4200 can be set up to log data automatically (as well as manually) at programmable intervals, in order to display a history of environmental information. Graphs display up to 3600 data points, 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.

The display is easy to read with illumination for use in poor lighting conditions.

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 +/- 1ºC. 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%.

The Kestrel 4200 Pocket Air Flow Tracker is as accurate and comprehensive as other instruments costing far more. On-screen customisation allows the technician to personalise their 4200.

The Kestrel 4200 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 five different languages: English, French, German, Italian or Spanish.

Kestrel 4200 measures

• Volume air flow
• Air velocity
• Air temperature
• Wind Chill
• Heat index
• Dew Point
• Relative Humidity
• Altitude
• Barometric pressure
• Density altitude
• Time & Date
• Wet bulb temperature

Choice of measurement units

• m3/s, m3/min, m3/hr, l/s, ft3/min
• kt, m/s, km/h, mph, ft/min, Beaufort
• ºC, ºF
• %
• mbar, inHg, hPa, psi
• m, ft
• cm, m, in, ft (for duct size diameter or length & width)

Accuracy

• Air flow ±3% of reading
• Velocity ±3% of reading or ±0.1m/s
• Temperature ±1ºC
• Relative humidity ±3%
• Dew point ±2ºC
• Barometric pressure ±1.5mbar

Operational Range

• Velocity 0.6 to 60 m/s
• Temperature -45 to +125ºC
• Relative humidity 0 to 100%
• Barometric pressure 10 to 1100mbar
• Duct size dimension up to 6.55m

Specification Range

• Velocity 0.6 to 40 m/s
• Temperature -29 to +70ºC
• Relative humidity 5 to 95%
• Barometric pressure 750 to 1100mbar

Available options:

• Bluetooth model

Kestrel 4200 features: What makes a Kestrel Unique?

• Multifunction instrument
• Graphical three-line displays
• Data capture up to 3600 readings
• Minimum/maximum/average values
• User defined screens
• Language selection
• Small robust design
• High accuracy
• High precision axle and low-friction Zytel® bearings
• Fast response temperature sensor
• User replaceable impeller
• Easy to read back-lit display
• Hard cover protects impeller
• Runs from 2 AAA batteries
• Data upload (with optional PC interface or integrated Bluetooth wireless technology)
• Available in safety orange
• 5 year warranty

Typical applications

• Heating and ventilation – air flow through fans, checking condition of filters
• Industry – air flow measurements, pollution control