Dew Point Instrument in the Industrial Application

Posted by Binda on November 29th, 2023

The development of precision industry can not be separated from the dew point with the engine blade welding, if the argon arc welding using argon gas humidity is too high, there will be a blackening of the situation, the blade becomes brittle temperature resistance deterioration, with the accident. In a sense, the control of dew point is the key condition of industrial productivity and product quality. What is dew point? Why in the field of precision industry, manufacturers are pursuing low dew point?

01 Dew point is key to quality and efficiency in production

Dew point, also known as dew point temperature, is one of the ways used to measure the absolute humidity of a gas. It can be simply understood as the temperature of the air at which the water vapour content of the air is saturated and condenses into liquid water at a certain atmospheric pressure. At this temperature, condensed water floating in the air is called mist, and when it sticks to a solid surface it is called dew.

The dew point temperature is a critical parameter in industry. For example, in specific processes such as drying, refrigeration, and gas treatment, inadequate dew point temperature control can lead to corrosion and damage of components, which in turn can lead to mechanical failure, contamination, and freezing.

Real-time monitoring and control of dew point temperature is the key to controlling air humidity, ensuring product quality and improving production efficiency.

In addition, the higher the ambient dew point temperature, the shorter the time an object has to store an electrical charge, and the electrical conductivity of the air increases. Therefore, in the precision industry (such as precision semiconductor industry), some of the ultra-clean room and lithium battery production in the drying room, etc. are very high requirements for dew point detection.

Other common applications include medical gases, drying environments in lithium battery production and high voltage gas insulation equipment used in the power industry.

02 Stability and accuracy are the biggest challenges in dew point measurement

The importance of dew point temperature dictates that dew point measurement must remain accurate in order to avoid losses.

In many industries, such as petrochemical, electric power, electronics, aerospace, metallurgy, textile, etc., the dew point measurement requirements are increasingly high. In the field of dew-point measurement, dew-point technology has been perfected, and many measurement principles and a variety of dew-point measurement instruments exist at home and abroad.

Dew point meter is a kind of instrument that can directly measure the dew point temperature in air or gas, belongs to a kind of temperature and humidity sensor, and occupies an important position in modern humidity measurement technology.

Often used in workshops, factories, warehouses, laboratories and other environments where temperature and humidity need to be monitored, it can help the production and quality control departments to accurately grasp the dew point of compressed gases, and continue to accurately control the quality of the product and enhance the value of the product.

Although the dew point meter itself has a very good long-term stability, but it is very susceptible to a variety of interfering factors, such as particles, impurities, oil or liquid, resulting in a reduction in the accuracy of the measurement. The lower the humidity, the more difficult it is for a dew point meter to measure.

Because the measurement of low humidity gases require larger cooling power and longer cooling time, and because the low humidity gases contain very little water vapour, it requires enough measured gas and time to collect water molecules to establish and gas phase equilibrium of the stable frost layer.

Dew point meter can be applied to low humidity measurement, low humidity measurement <5% RH. suitable for industrial drying, compressed air systems, the semiconductor industry, drying room, oven and metal heating treatment and other industrial applications of low humidity environment. Overall, dew point meters are essential for use in a variety of industries.