OLED Display (no backlight needed),...
Measures WBGT, Black Globe Temperature, Humidity, Air Temperature, Wet Bulb and Dew Point
Center 317 Humidity Temperature Meter with Dew Point and Wet Bulb temperature measurements
Extech HT30 Heat Stress WBGT (Wet Bulb Globe Temperature) Meter. Considers the effects of temperature, humidity, and direct or radiant sunlight
Extech EA20 EasyView™ Hygro-Thermometer. Dual display of RH, Temperature, Dew Point and Wet Bulb