A portable dew point meter is a gas moisture content detection instrument based on capacitive polymer sensing technology, used to quickly and accurately measure the dew point temperature (unit: ℃ or ℉) in gases. The instrument complies with internationally recognized humidity measurement standards and has the characteristics of anti pollution, fast response, and high stability. It is suitable for real-time detection needs in industrial sites, laboratories, and outdoor environments. When the temperature drops, the temperature at which water vapor in the air turns into dew is called dew point. When the temperature is below zero degrees Celsius, it is also called a frost point, where water condenses into frost. Measuring dew point temperature is crucial for many industries and applications, as it can help determine the water vapor content in the air and predict the temperature at which water vapor will condense into water under specific conditions.