In WBGT, which term refers to radiant heat?

• A. Wet bulb temperature
• B. Dry bulb temperature
• C. Black Globe Temperature
• D. Dry Globe Temperature

Answer: (C)

Radiant heat is captured by the globe component of WBGT. The black globe thermometer absorbs radiant energy from the sun and surrounding surfaces, so its temperature reflects the radiant heat load on a person. This globe temperature (often called black globe temperature) is the radiant-heat term in WBGT, separate from the dry-bulb air temperature and the wet-bulb evaporative cooling. So the term that refers to radiant heat is the globe temperature measured by the black globe thermometer.