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Overview

This model was discontinued in 2009 - the Kestrel 4200 offers all the same features and more.

The Kestrel 4100 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. At the touch of a button air flow information is clearly shown in digital or graphical form.

Ideal for HVAC, health & safety, facilities and maintenance engineers, the Kestrel 4100 offers a multitude of features to help monitor your environment in one single instrument - right in the palm of your hand.

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 4100 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 2000 data points, the value, time and date of capture point can be shown. An optional interface is available to upload the data direct to a PC.

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

High precision jewel bearings and a lightweight impeller provide accurate air flow measurements (+/-3% of reading) and the ability to operate at speeds as low as 0.3 metres a second. 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%.

Volume air flow is based on the air velocity and dimensional shape of the opening or duct, the user simply selects the shape type and enters the diameter or length and width.

The combination of the Kestrel 4100's multiple sensors result in the following derived functions: wind chill, heat index and dew point. Wind chill is the combination of air velocity and air temperature, so the greater the air velocity the colder it feels. Heat index is the combined effect of air temperature and relative humidity. Hot, humid air actually feels hotter than hot, dry air. Dew point is the temperature at which moisture forms on a surface.

The Kestrel 4100 Pocket Air Flow 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 five different languages: English, French, German, Italian or Spanish.

Kestrel 4100 features

• Multifunction instrument
• Graphical displays
• Data capture up to 2000 readings
• Minimum/maximum/average values
• User defined screens
• Language selection
• Small robust design
• High accuracy
• Precision jewel mounted impeller
• Fast response temperature sensor
• User replaceable impeller
• Easy to read back-lit display
• Hard cover protects impeller
• Runs from 2 AAA batteries
• Optional PC download
• 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

Check out the Kestrel prices at our online shop