1. What is WBGT (Wet Bulb Globe Temperature)?

Definition: WBGT is a measure of heat stress in direct sunlight that takes into account temperature, humidity, wind speed, and solar radiation.

Purpose: It's widely used in industrial, military, and sports settings to assess heat stress risk and prevent heat-related illnesses.

2. How Does the Calculator Work?

The calculator uses the basic WBGT formula:

Where:

• \( WBGT \) — Wet Bulb Globe Temperature (°C)
• \( T_w \) — Wet Bulb Temperature (°C)
• \( T_d \) — Dry Bulb Temperature (°C)

Explanation: The formula weights the wet bulb temperature more heavily (70%) because it accounts for both temperature and humidity, which are critical factors in heat stress.

3. Importance of WBGT Measurement

Details: WBGT is crucial for preventing heat-related illnesses like heat stroke, heat exhaustion, and heat cramps. It's used to establish work/rest cycles and hydration requirements in hot environments.

4. Using the Calculator

Tips: Enter the wet bulb temperature (T_w) and dry bulb temperature (T_d) in degrees Celsius. The calculator will compute the WBGT index.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between wet bulb and dry bulb temperatures?
A: Wet bulb temperature measures evaporative cooling potential (affected by humidity), while dry bulb measures actual air temperature.

Q2: What WBGT level is considered dangerous?
A: Generally, WBGT above 28°C requires caution, above 30°C requires increased breaks, and above 32°C may require stopping strenuous activity.

Q3: Is this the full WBGT formula?
A: This is the basic formula. The full outdoor formula includes globe temperature: 0.7T_w + 0.2T_g + 0.1T_d.

Q4: How do I measure wet bulb temperature?
A: Use a psychrometer or a properly ventilated wet bulb thermometer.

Q5: Why is WBGT better than just temperature for heat stress?
A: Because it accounts for humidity and radiation, which significantly affect how the body experiences and copes with heat.