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Heat Stress WBGT Meter

Extech HT30

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The HT30 Wet Bulb Globe Temperature (WBGT) meter allows you to measure Heat Stress Index, or how hot it feels when humidity is combined with temperature, air movement, and radiant heat. The meter can also take individual temperature, humidity, and radiant heat measurements as well as monitor the effects of direct solar radiation on an exposed surface using the Black Globe temperature sensor. An in/out function displays the WGBT value with or without direct sun exposure. Additional features include Auto Power Off with override and a built-in RS-232 interface. Complete with 2 AAA batteries.

General Specifications
Black Globe Temperature (TG)
32 to 176 °F (0 to 80 °C)
Black Globe Temperature (TG) Basic Accuracy
±4 °F/2 °C
Relative Humidity
0 to 100%
Relative Humidity Basic Accuracy
Temperature (Air)
32 to 122 °F (0 to 50 °C)
Temperature (Air) Basic Accuracy
±1.8 °F/1.0 °C
Wet Bulb Globe Temperature (WBGT)
32 to 122 °F (0 to 50 °C)
Wet Bulb Globe Temperature (WBGT) Basic Accuracy
±4 °F/2 °C
Additional Details
10 × 1.9 × 1.1" (254 × 48.7 × 29.4mm)
2 × AAA (1.5V) batteries
2 years
4.8oz (136g)
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Export Restrictions

Export Restrictions

The information contained in this page pertains to products that may be subject to the International Traffic in Arms Regulations (ITAR) (22 C.F.R. Sections 120-130) or the Export Administration Regulations (EAR) (15 C.F.R. Sections 730-774) depending upon specifications for the final product; jurisdiction and classification will be provided upon request.

Extech HT30