The amount of water contained in various properties of substances often affects the properties, uses, quality and storage of the substances. Solids contain water, liquids contain water, powders will absorb water, organisms contain water, and gases contain different amounts of water. Water penetrates into various types of substances at the same time. In addition to seas, rivers, and lakes, the atmospheric environment we live in is also rich in gaseous water, which is called water vapor. Water, with the molecular formula H2O, is the most widely distributed substance on the earth where we live.
According to the measurement principle, the technicians of York Instruments conducted comparative analysis and research on different sensors such as alumina, polymer and ceramics, and adopted different technical methods and methods. We have solved the problem of measuring trace moisture in different fields and environments from many instruments and equipment that directly and indirectly measure trace moisture in gas.
With the development of modern science and technology, people apply photoelectric technology, new material technology, infrared technology, microwave technology, microelectronic technology, optical fiber technology, acoustic technology and even nanotechnology to the measurement of moisture in gas.
Polymer capacitive dew point meter Using polymer capacitor materials, the general accuracy can reach within ☓℃, and the dew point above -60℃ is generally measured. Thin-film capacitive dew point meter Using thin-film capacitor materials, the general accuracy can reach within ☓℃, and generally measure the dew point above -55℃. The current accuracy is ☐.1℃, and companies that currently produce chilled mirror dew point meters basically use this principle.Ģ. This type of dew point meter can be used as a standard dew point meter under the premise of ensuring accurate dew detection, high efficiency of mirror cooling and precise measurement of dew temperature. The mirror-type dew point meter adopts a direct measurement method. The methods of mirror refrigeration include: semiconductor refrigeration, liquid nitrogen refrigeration and high-pressure air refrigeration. Using photoelectric detection technology, the exposed layer is detected and the temperature at the time of condensation is measured, and the dew point is directly displayed. Mirror dew point meter Gases with different moisture content will condense on the mirror surface at different temperatures. It is widely used for standard transmission, but its disadvantage is that it is more expensive and requires experienced personnel to operate and maintain.ġ. Among them, the chilled mirror dew point meter is the most accurate, reliable, and basic measurement method. The above-mentioned instruments of various principles have their own advantages and disadvantages. Among them, alumina capacitive dew point and dew point analyzers are generally used for measurement in the low humidity range, while chilled mirror and film capacitive dew point analyzers can be used not only for low humidity measurement, but also for medium and high humidity, that is, relative humidity measurement. In principle, the main mainstream dew point analyzers can be divided into chilled mirror type, alumina capacitor type, film capacitor type, polymer capacitor type and so on.
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