Amazon.com: Wearable 2-in-1 WBGT + HI Heat Index Checker Wet Bulb Globe Temperature Heat Stress Meter Air Globe Temperature Humidity Tester with Dangerous Level Indicator Audible Alarm : Industrial & Scientific
How to make a black globe sensor
Analogue Thermometers Glass Globe Thermometer, For Laboratory
Wet Bulb Globe Temperature: How and when to use it