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We provide a brief explanation of terms related to dew point meters, oxygen concentration meters, and more. 【Contents】 ■ Thinking about water ■ About measuring instruments ■ Calibration ■ Building a measurement system ■ About standards *For more details, please be sure to visit the URL below.

■What is a Dew Point Meter? A device that measures trace amounts of moisture contained in gases such as gas or dry air. It is expressed in terms of the temperature at which moisture in the gas condenses, known as the dew point temperature (°C dp). ■What is Dew Point? The temperature at which condensation, or the process of liquefaction, occurs when cooling a gas. This ultimately represents the temperature at which air is in equilibrium with water and is saturated. The dew point is an important factor not only in everyday life but also in various industrial fields (such as painting, semiconductors, batteries, power, railways, pharmaceuticals, gas refining, renewable energy, chemical plants, agriculture, food, air, industrial gases, steel, air conditioning, heat treatment, etc.). ■Types of Dew Point Meters There are several types of dew point meters based on measurement principles. The dew point meters currently in use are as follows: 1) Capacitive Dew Point Meter (Aluminum Oxide) 2) Capacitive Dew Point Meter (Polymer) 3) Mirror-Cooling Dew Point Meter 4) Phosphorus Pentoxide Dew Point Meter 5) Laser Dew Point Meter

Techne Measurement Co., Ltd. applied to the Japan Anniversary Association to designate June 10 as Dew Point Meter Day, and it has been officially recognized. We hope that this anniversary will serve as an opportunity to convey the benefits of dew point measurement and encourage more people to consider and feel closer to it. We have provided materials and videos explaining dew point meters and Dew Point Meter Day. Please take a look. **Purpose of Registration** A "dew point meter" is a device that measures the moisture content in gases. In the industrial sector, dew point measurement contributes to improved manufacturing efficiency and more environmentally friendly production. It also helps enhance product quality. The goal is to spread awareness of the various benefits of dew point measurement, as well as basic knowledge about dew point meters, their correct usage, and the importance of calibration. **Origin of the Date** The date is derived from the wordplay of reading 6 and 10 as "ro (6) ten (10)."

○ What is the dew point? The dew point (dew point temperature) is the temperature at which condensation begins when a gas is cooled. If the amount of water vapor in the air is low, the dew point is low; if there is a lot of water vapor, the dew point is high. In other words, the dew point quantifies the amount of water vapor in the air and represents something similar to humidity. ○ What is saturated water vapor? The state in which "no more moisture can enter the air" is called "saturation," and the amount of water vapor in the state where "no more water vapor can enter the air" is referred to as "saturated water vapor." *For more details, please check the URL below.

○ What is humidity? It is a numerical value that represents the amount of water vapor contained in the atmosphere as a ratio. Even at the same temperature, the perception can differ with varying humidity levels. When humidity is high, it feels hotter. There are several indicators for humidity. This time, we will introduce the commonly used relative humidity. *For more details, please check the URL below.

Measuring instruments are designed and manufactured based on various standards such as electrical and material specifications. The Techne Measurement website provides explanations of relevant general industrial standards, regulations regarding hazardous substances, and electrical standards.