Relative Humidity Calculator Wet Bulb Dry Bulb

In of mercury mm of mercury millibars hpa.

Relative humidity calculator wet bulb dry bulb. Dry bulb temperature and. By definition wet bulb temperature is the lowest temperature a portion of air can acquire by evaporative cooling only. Note that continuously air flow around the thermometer is important to evaporate. There is a converter below this calculator if you only know the celsius temperature for the entries required.

Dry bulb temperature t db can be measured with a simple thermometer as shown above. 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. Enter a temperature wet bulb and actual station pressure. Dry bulb temp c.

Wet bulb temp c. Calculate dewpoint wet bulb temperature from relative humidity. This script will determine the relative humidity from the entered dry and wet bulb temperatures data. When the psychrometer is swung around by its attached chain or handle the air causes the water on the wick to evaporate which.

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. Wet bulb temperature t wb can be measured with a standard thermometer with some wet clothing cotton or similar around the bulb. Enter the two different temperatures. A simple online weather calculator to find the dewpoint and the wet bulb temperature by knowing the values of relative humidity temperature and actual station pressure.

Air humidity can be estimated by measuring. Enter dry bulb temperature plus either wet bulb temp rh or dewpoint temp. In of mercury mm of mercury millibars hpa. 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.

At lower humidity the wet bulb temperature is lower than dry bulb temperature because of evaporative cooling. Relative humidity dewpoint temp c results. Enter a temperature relative humidity and actual station pressure. Enter your actual station pressure not the altimeter setting.

If the air is fully saturated 100 relative humidity the water cannot evaporate so both the wet and dry bulb temperatures are the same. Enter your actual station pressure not the altimeter setting. The entry required is in fahrenheit degrees.