Product Manual
20
The Kestrel 5400 also displays a measure of human heat
stress known as “Thermal Work Limit,” or “TWL.” Unlike WBGT,
which is a measure of the environment, TWL is an estimate
of the cooling capacity of a human body in given conditions.
Accordingly, a higher TWL is safer because a person is able to
eliminate more heat from their body. TWL provides four work
level recommendations (Unrestricted, Acclimatization, Buer,
and Withdraw) to help guide work management in thermally
dangerous conditions.
THERMAL WORK LIMIT TWL
TWL w/m
2
154.2
Acclime
TWL CURRENT MEASUREMENT SCREEN
*Unacclimatized workers are dened as new workers who have been o work for more than 14 days due to illness or leave (outside the tropics).
TWL values, working zones, and interventions. Source: health Authority, Abu Dhabi. If available, refer to TWL standards for
your organization or for more information see http://www.tandfonline.com/doi/abs/10.1080/104732202753438261.
» Measurement & Icon
» Units
» T WL Measurement
» Working Zone