Kestrel 4400 Heat Stress Tracker

Kestrel 4400 Heat Stress Tracker

The Kestrel 4400 proactively monitors and logs the environment to establish when employees should make provisions to prevent heat stress related illness. Within seconds, it assesses the level of heat stress and displays the index on the screen.

Key features of the Kestrel 4400 Heat Stress Tracker:-

Waterless Wet Bulb Globe Temperature (WBGT)

Before the Kestrel 4400, most accurate Wet Bulb Globe Temperature measurement tools were large, cumbersome to use (requiring the transport of distilled water along with the measurement unit) and/or expensive. The pocket sized Kestrel 4400 provides accurate waterless Wet Bulb Globe Temperature measurements within minutes of exposure to the air.

The Black Globe

The Kestrel 4400 contains a compact black globe thermometer which monitors the radiant heat exposure of one in sunlight. The 1" Black Globe is calibrated to achieve the same measurements as a 6" globe.

Thermal Work Limit (TWL)

The 4400 displays TWL, another recognized composite heat stress prediction tool. Clothing levels can also be customized, making the Kestrel 4400 particularly useful in activities requiring heavy protective gear which worsens heat stress.

On Screen Alarms

For both WBGT and TWL, the Kestrel 4400 provides on-screen alarms when conditions enter the caution and danger zones, providing clear and immediate guidance that heat illness prevention steps must be taken.

Mean Radiant Temperature

Mean Radiant Temperature is primarily used to define the comfort of an individual in a defined, closed space (four walls and a ceiling). It is regarded as the most important measurement governing indoors comfort.

Naturally Aspirated Wet Bulb Temperature

Naturally Aspirated Wet Bulb Temperature function accounts for the effects of humidity on the human body. By combining relative humidity and wind speed, the temperature displayed is indicative of the evaporative cooling happening to the Kestrel 4400.

Your Kestrel 4400 Heat Stress Tracker comes with 

  • Protective transport case
  • Kestrel Vane Mount
  • Batteries - 2 AAA
  • Kestrel Certificate of Conformity

Brochure Downloads

For more information please download the Kestrel 4400 Heat Stress Tracker brochure.

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