# BGT

Black Globe Temperature (BGT) is measured by a thermometer placed at the centre of a blackened sphere made of thin copper. It is currently determined using the following equation:

where T represents the air temperature in degrees Celsius and SR the solar radiation in W/m2.

BGT
• 0 – 19
• 20 – 24
• 25 – 29
• 30 – 34
• 35 – 39
• 40 – 44
• 45+