Table of Contents
What are two parts of a psychrometer and what do they each measure?
12.3. A psychrometer measures the dry-bulb and wet-bulb temperatures simultaneously. The wet-bulb temperature-sensing element, covered with the wick, and the dry-bulb temperature sensor, are placed in the airstream to be measured.
What is a psychrometer made of?
The simplest psychrometer is, in fact, a system of two bulb thermometers (mercury or alcohol), one of which is dry, and the second is wet (moistened), i.e. wrapped in a damp cotton cloth. One end of this fabric is dipped into a reservoir of water. The water evaporates and cools the wet thermometer.
What steps should you follow to measure humidity with a psychrometer?
To compute the relative humidity, find 100% on the innermost scale and point it at the dry-bulb temperature T. Then follow the temperature scale counterclockwise until you find the dewpoint Td. Read the corresponding relative humidity on the innermost scale.
What is an example of a psychrometer?
Wet and dry bulb thermometer.
How do psychrometers work?
A psychrometer is a device used to measure the humidity of air. It accomplishes this by comparing the difference in temperature between a dry thermometer bulb and a wet thermometer bulb that has lost some of its moisture through evaporation.
How are the two thermometers in psychrometer different?
A psychrometer or sling psychrometer is a device used to measure relative humidity. It has two thermometers. The difference in temperature reading between the wet-bulb and dry-bulb thermometers indicates the amount of water vapor in the air. A table like the one below is used to determine the relative humidity.
What are the objectives of psychrometer?
A psychrometer measures the relative humidity in the atmosphere through the use of two thermometers: a dry bulb thermometer, is used to measure the temperature by being exposed to the air.
What is the principle of psychrometer?
What tool could you use to measure humidity?
Using Hygrometers to Measure Humidity A humidity monitoring device is called a hygrometer. Hygrometers may be designed for indoor or outdoor humidity monitoring use (or both).
How does a wet and dry bulb thermometer measure humidity?
Set the thermometers in front of the fan as before. After 5 minutes record the “wet bulb” temperature reading and the “dry bulb” temperature reading. 4. To determine relative humidity subtract the lower “wet bulb” temperature from the higher “dry bulb” temperature to determine the difference and compare to the chart.