When the dry bulb and wet bulb temperatures are the same, it indicates that the air is fully saturated with moisture, meaning the relative humidity is 100%. In this case, with both the dry bulb and wet bulb at 66°F, the relative humidity is indeed 100%.
The relative humidity is about 45%.
No, the humidity is high when wet and dry bulb temps are far apart.
It is used to ready humidity levels. You compare the readings off the wet and dry bulb, then find the humidity on the chart (see Sling Psychrometer).
You would use both to determine the relative humidity.
the relative humidity will decrease.
dry bulb temperature simply tells us the temperature of dry air.but the comfort also depends on humidity ie. water vapour presents in the air.Wet bulb temperature measures the humidity in the air.Because the evaporation of water in the bulb wick depends on the relative humidity of surrounding air.
To determine the relative humidity, we need a psychrometric chart that relates wet-bulb and dry-bulb temperatures. Without that information, we cannot provide the exact relative humidity at those temperatures.
The difference between wet-bulb and dry-bulb temperature is called the Wet-Bulb Depression. It is a measure of air humidity, with a larger depression indicating higher humidity levels.
No, the relative humidity will be low if the wet-bulb depression increases. Wet-bulb depression is the difference between the dry-bulb temperature and the wet-bulb temperature, and a higher wet-bulb depression indicates drier air.
Hygrometer
A sling psychrometer (or hygrometer) uses the difference in readings between a wet bulb thermometer and another with a dry bulb to measure the relative humidity. The bulb that is wet will cool by evaporation to the "dew point", which is the temperature at which the current humidity would be the maximum possible. Comparing that to the dry bulb (the general air temperature) on a comparative chart will yield the approximate relative humidity.
the wet bulb is cooler