1. What is Relative Humidity?

Relative humidity (RH) is the ratio of the current amount of water vapor in the air to the maximum possible amount at that temperature, expressed as a percentage. The wet/dry bulb method is a classic way to measure it.

2. How Does the Calculator Work?

The calculator uses the Magnus formula:

Where:

• \( T_{wet} \) — Wet bulb temperature (°C)
• \( T_{dry} \) — Dry bulb temperature (°C)
• \( e \) — Exponential function

Explanation: The formula calculates the ratio of saturation vapor pressure at wet bulb temperature to that at dry bulb temperature.

3. Importance of Wet/Dry Bulb Measurement

Details: Wet/dry bulb measurements are crucial for HVAC systems, weather forecasting, industrial processes, and agricultural applications where humidity control is important.

4. Using the Calculator

Tips: Enter both temperatures in Celsius. Wet bulb must be equal to or lower than dry bulb temperature. For accurate results, ensure proper psychrometer technique was used.

5. Frequently Asked Questions (FAQ)

Q1: Why does wet bulb temperature matter?
A: Wet bulb temperature indicates the lowest temperature air can reach by evaporative cooling, which directly relates to humidity.

Q2: What's the difference between wet bulb and dew point?
A: Wet bulb is affected by both temperature and humidity, while dew point is the temperature at which air becomes saturated.

Q3: How accurate is this method?
A: With proper measurement technique, accuracy is typically ±5% RH. Electronic sensors may be more precise.

Q4: What if my wet bulb reading is higher than dry bulb?
A: This is physically impossible - check your measurements as this indicates an error.

Q5: Can I use Fahrenheit measurements?
A: The formula requires Celsius. Convert Fahrenheit to Celsius first: °C = (°F - 32) × 5/9.