Features

The hand-held Wet Bulb Globe Temperature (WBGT) Heat Stress Monitor (HSM) measures WBGT readings, which is a composite temperature of the ambient temperature, wind speed, pressure and relative humidity. A portable device with a palm size of 16.5 x 5.9 x 2.8 cm and weighing at 125 grams, the WBGT HSM can provide a more accurate reading of a specific training environment. It enables commanders on the ground to closely monitor localised WBGT readings, which can be generated within a few minutes. Based on these readings, ground commanders can better advise soldiers on the work-rest cycle - intervals that they should train and rest - as they carry out strenuous training activities.

WBGT HSM and Work-Rest Cycle

To ensure that soldiers train safely even when outdoor temperatures are high, the Singapore Armed Forces has established a work-rest cycle guideline to correspond with the different WBGT readings. If a localised WBGT reading is high, shorter training intervals will be adopted as core temperatures of the soldiers are likely to rise at a faster rate in higher WBGT readings. Sufficient rest intervals during training can lower the chances of soldiers suffering from heat injuries.

Implementation

The WBGT HSM was introduced in Army units and its training centres in June 2014. Prior to the implementation, WBGT readings were provided by four supporting medical centres across Singapore.