Dry bulb temperature and.
Relative humidity calculator wet bulb dry bulb.
Wet bulb temperature t wb can be measured with a standard thermometer with some wet clothing cotton or similar around the bulb.
Air humidity can be estimated by measuring.
Enter dry bulb temperature plus either wet bulb temp rh or dewpoint temp.
If the air is fully saturated 100 relative humidity the water cannot evaporate so both the wet and dry bulb temperatures are the same.
Dry bulb temp c.
Enter a temperature relative humidity and actual station pressure.
The wet bulb temperature wbt is the temperature read by a thermometer covered in water soaked cloth wet bulb thermometer over which air is passed.
In of mercury mm of mercury millibars hpa.
Dewpoint is the atmospheric temperature below which water droplets begin to condense and become dew.
Enter a temperature wet bulb and actual station pressure.
Enter your actual station pressure not the altimeter setting.
Enter the two different temperatures.
Dry bulb temperature t db can be measured with a simple thermometer as shown above.
There is a converter below this calculator if you only know the celsius temperature for the entries required.
Note that continuously air flow around the thermometer is important to evaporate.
In of mercury mm of mercury millibars hpa.
This script will determine the relative humidity from the entered dry and wet bulb temperatures data.
The entry required is in fahrenheit degrees.
Enter your actual station pressure not the altimeter setting.
Wet bulb temp c.
If the dry and wet bulb temperatures are set to the same value the calculator will show the saturation mixing ratio the amount of water in saturated air at that temperature.
Relative humidity is measured using a device called a sling psychrometer this consists of 2 side by side conventional thermometers one of which the wet bulb thermometer has a wetted wick placed at the bottom the other the dry bulb thermometer has no wetted wick.
Calculate dewpoint wet bulb temperature from relative humidity.
At 100 relative humidity the wet bulb temperature is equal to the air temperature dry bulb temperature.
By definition wet bulb temperature is the lowest temperature a portion of air can acquire by evaporative cooling only.
Relative humidity dewpoint temp c results.
It includes a dry bulb thermometer a wet bulb thermometer and a psychrometric chart a graph that plots the relationships between the dry and wet bulb temperature relative humidity and dew point at constant pressure.
