Wet Bulb Dry Bulb Dew Point

Enter your actual station pressure not the altimeter setting.

Wet bulb dry bulb dew point.

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. The knowledge of only two of these values is enough to determine the state of the moist air including the content of water vapor and the sensible and latent energy enthalpy in the air. There is a converter below this calculator if you only know the celsius temperature for the entries required.

The temperature where the two meet is the dew point temperature in c. Dry bulb wet bulb and dew point temperatures. The dry bulb wet bulb and dew point temperatures are important to determine the state of humid air. Use the dry bulb temperature on the y axis and the difference between the wet and dry bulb on the x axis.

Enter a temperature wet bulb 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. The dry bulb wet bulb and dew point temperatures are important to determine the state of humid air. The entry required is in fahrenheit degrees.

Dew point and wet bulb temperatures are very important in indicating the state of the humid air. The knowledge of only two of these values is enough to determine the state including the content of water vapor and the sensible and latent energy enthalpy. Enter the two different temperatures. These can be calculated automatically using wildland fire rh calculator apps for ios and android available for free.

At 100 relative humidity the wet bulb temperature is equal to the air temperature dry bulb temperature. At lower humidity the wet bulb temperature is lower than dry bulb temperature because of evaporative cooling. The key difference between dewpoint and wet bulb temperature is that dewpoint temperature is the temperature to which we should cool the air to saturate the air with water vapor whereas wet bulb temperature is the temperature that we get from a moistened thermometer bulb that is exposed to air flow. By definition wet bulb temperature is the lowest temperature a portion of air can acquire by evaporative cooling only.

Find the dew point temperature by using the top chart from the resource listed below.