Wet Dry Bulb Psychrometer

When the psychrometer is swung around by its attached chain or handle the air causes the water on the wick to evaporate which.

Wet dry bulb psychrometer.

Fieldpiece prh2 is a pocket type digital psychrometer that comes with a friendly price point. 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. Evaporation from the wick surrounding the wet bulb cools the thermometer. A sling psychrometer is an instrument that measures the relative humidity and dew point in an area.

The lower the rh in the air the more is the evaporation from the wick and the lower the temperature of the wet bulb. The dry bulb is simply a thermometer. The psychrometer consists of a dry bulb thermometer and a wet bulb thermometer. A sling psychrometer has two thermometers.

The dry bulb thermometer shows the temperature of the air and the wet bulb thermometer whose bulb is wrapped with wet cambric shows a temperature that is dependent on the amount of evaporation from the surface of its bulb. A widely used device for measuring wet and dry bulb temperature is a sling psychrometer which consists of a pair of mercury bulb thermometers one with a wet sock to measure. A wet bulb and a dry bulb. This tool is very easy to use slim and provides instant reading through the screen over the wet bulb rh dew point and dry bulb temperatures.

The relative humidity rh is measured by reading the two thermometers. A psychrometer or a wet and dry bulb thermometer consists of two calibrated thermometers one that is dry and one that is kept moist with distilled water on a sock or wick. The wet bulb has a cotton wick over the bulb of the thermometer which is moistened with room temperature water. Wet bulb temperature is measured using a thermometer that has its bulb wrapped in cloth called a sock that is kept wet with distilled water via wicking action.

Such an instrument is called a wet bulb thermometer. Psychrometer a hygrometer composed of two similar thermometers the bulb of one thermometer is kept wet by means of a thin wet cloth wick so that the cooling that results from evaporation makes it register a lower temperature than the dry bulb thermometer. By definition wet bulb temperature is the lowest temperature a portion of air can acquire by evaporative cooling only. When readings are taken simultaneously it is possible with the use of psychrometric tables to determine the relative humidity and dew.

Due to the small 2 inch length probe we classify this one as the entry level model for duct inspection works. At temperatures above the freezing point of water evaporation of water from the wick lowers the temperature such that the wet bulb thermometer will be at a lower. The rh is found from a table.