How to Measure Humidity with a Wet Bulb
What is Wet Bulb Temperature ?
Wet bulb temperature (WBT) is the temperature of a liquid that is evaporating into air. The wet-bulb temperature is lower than the dry-bulb temperature, which is the temperature of the air that is not evaporating into the liquid.
The wet-bulb temperature is measured by wrapping a wet cloth around the bulb of a thermometer. The cloth is then allowed to evaporate into the air. The temperature of the thermometer is then read. The wet-bulb temperature is the temperature that is read on the thermometer.
Why is Wet Bulb Temperature Important?
Wet bulb temperature is an important tool for measuring the humidity and heat index of the air. It is used in a variety of applications, including:
* Agriculture: The wet-bulb temperature is used to measure the humidity of the air and to determine the need for irrigation.
* Construction: The wet-bulb temperature is used to determine the safety of working conditions in hot and humid environments.
* Energy: The wet-bulb temperature is used to determine the efficiency of air conditioners and other cooling systems.
* Health: The wet-bulb temperature is used to determine the risk of heat stroke and other heat-related illnesses.
How Does Wet Bulb Temperature Affect Human Health?
Wet bulb temperature can have a significant impact on human health. When the wet bulb temperature is high, it can be difficult for the body to cool itself down. This can lead to heat stroke, a serious medical condition that can be fatal.
The risk of heat stroke increases as the wet bulb temperature increases. For example, the risk of heat stroke is 10 times higher when the wet bulb temperature is 95 degrees Fahrenheit than when it is 75 degrees Fahrenheit.
How Can We Protect Ourselves from the Effects of High Wet Bulb Temperatures?
There are a number of things that we can do to protect ourselves from the effects of high wet bulb temperatures. Some of these things include:
* Stay hydrated: It is important to drink plenty of fluids, especially water, when the wet bulb temperature is high.
* Avoid strenuous activity: Strenuous activity can increase the risk of heat stroke. It is best to avoid strenuous activity when the wet bulb temperature is high.
* Wear loose-fitting, light-colored clothing: Loose-fitting, light-colored clothing will help your body to cool down more easily.
* Take breaks in the shade: If you must be outside in hot, humid weather, take frequent breaks in the shade.
* Use a cooling towel: A cooling towel can help to cool your body down.
* Seek medical attention if you experience symptoms of heat stroke: Symptoms of heat stroke include:
- Fever of 103 degrees Fahrenheit or higher
- Rapid heart rate
- Heavy sweating
- Confusion
- Dizziness
- Headache
- Nausea
- Vomiting
- Muscle cramps
- Pale or flushed skin
- Rapid breathing
- Unconsciousness
Humidity is an important factor in many fields
Humidity control has strict requirements in the fields of agriculture , industry, meteorological measurement , environmental protection, national defense, scientific research, aerospace, etc. Therefore, humidity measurement technology has been greatly developed as the requirements continue to be strict .
There are 3 Main Methods for Measuring Humidity:
Common humidity measurement methods are :
Dew point method, wet and dry bulb method and electronic sensor method. The dry-wet bulb method was applied earlier .
In the 18th century, humans invented the wet-dry bulb hygrometer. Its working principle is composed of two thermometers with exactly the same specifications.
One is a dry bulb thermometer, which is exposed to the air to measure the ambient temperature;
The other is a wet bulb thermometer, which is heated after being soaked. Wrap it with gauze to keep the gauze moist for a long time. The moisture in the gauze evaporates to the surrounding air and takes away heat, which reduces the temperature of the wet bulb. The moisture evaporation rate is related to the moisture content of the surrounding air. The lower the air humidity, the faster the moisture evaporation rate, resulting in the lower the wet bulb temperature. The wet and dry bulb hygrometer uses this phenomenon to determine the air humidity by measuring the dry bulb temperature and the wet bulb temperature.
Some Challenges of Using the Wet and Dry Bulb Method
However, it is more difficult to operate this way. First, you must keep the gauze moist at all times. Second, the dry and wet bulb thermometer will have a greater impact on the environment.
For example, dust and other pollutants will contaminate the gauze, or problems such as insufficient water flow will cause wetness. The temperature of the ball is too high, and the resulting relative humidity will eventually be too high. Although the cost of the wet and dry bulb hygrometer is relatively low and the price is cheap, the measurement is prone to errors, so we'd better use electronic measurement.
Many application fields need to measure dry and wet bulb data, such as agriculture, edible fungus cultivation, environmental testing equipment industry and so on. However, the environment in these industries is mostly harsh, prone to pollutants such as dirt, dust, etc. The selection of electronic sensor measurement can not only directly calculate the dry and wet bulb data, but also ensure the accuracy and accuracy of the measurement.
What HENGKO Supply You for Humidity Measurement ?
Shenzhen HENGKO Technology Co., Ltd. is a manufacturer dedicated to the development and manufacture of temperature and humidity sensing instruments, with more than ten years of rich production experience and strong manufacturing technology capabilities.
HENGKO HK-J8A102 / HK-J8A103 multifunction digital hygrometer/ psychrometer, it is an industrial grade, high-precision measuring instruments temperature and relative humidity. The instrument is powered by a 9V battery and uses an external high-precision probe. It has the functions of measuring humidity, temperature, dew point temperature, and wet bulb temperature. It can easily respond to the needs of accurate temperature and humidity measurement in various occasions. This product is a laboratory,
Ideal for industrial and engineering temperature and humidity measurement. The product is easy to operate. When selecting the dew point temperature and the wet bulb temperature, there will be symbols on the display screen, and the data is simple and clear and easy to record. And it also has the function of data recording, which can record 32,000 pieces of data, and can be installed with a battery to avoid the suspension of data recording due to unexpected situations such as power failure. It can be used for patrol inspection or fixed in a place for regular measurement.
Temperature and humidity sensing instruments and accessories series include: temperature and humidity sensor, temperature and humidity sensor housing, temperature and humidity probe, temperature and humidity sensor PCB module, temperature and humidity transmitter, dew point sensor, dew point probe housing, wireless temperature and humidity recorder, etc. We wholeheartedly provide our customers with corresponding products and support, and look forward to forming a stable strategic cooperative relationship with friends from all walks of life and working hand in hand to create a better future!
