Instrument at a Glance
Heat stress index
Heat illnesses can be fatal. However, with proper precautions, it can be avoided. Thermal Work Limit
(TWL) is a heat index calculated from environmental parameters, including dry bulb temperature,
wet bulb temperature, globe bulb temperature and wind speed and accommodates for clothing
factors as well as human physiological status to estimate a safe maximum continuous suitable
metabolic rate. It is designed primarily for self-paced workers who are well hydrated and
acclimatized in the working condition.
Instrument
TWL-1S Heat Stress Meter offers a compact-designed hardware with deliberate software and user-
friendly interface. 3-color backlight based on TWL index informs users the risk level.
Work break timer reminds users the work/rest schedule and actively notifies the remote pager
(optional ) when it counts down to zero.
1
Please contact sales representative for wireless paging function.
1
3
Power
Mode
TWL
Black bulb
Temperature &
humidity sensors
inside
Backlight
Timer
Page (optional)
Wind cup
LCD display
