The constant temperature and humidity test chamber is a test equipment that integrates temperature and humidity. One important aspect is the humidity test. Therefore, every producer and user should know the humidity related concept.
Humidity: refers to the amount of water vapor in the air;
Relative humidity: refers to the ratio of the actual air humidity to the humidity at the same temperature to reach saturation;
Absolute humidity: the ratio of the mass of water vapor in the air to the total volume of humid air;
Dew point temperature: The temperature at which a constant temperature and humidity test chamber is mixed with water at a given pressure and saturated with γ. The saturated vapor pressure of water at this temperature is equal to the partial pressure of water vapor of the moist air having a mixing ratio of γ;
Dew point: refers to the temperature at which saturated water vapor in the air begins to condense to dew. At 100% relative humidity, the ambient temperature is the dew point temperature. The lower the dew point temperature is than the ambient temperature, the less the possibility of condensation, which means that the drier air is, the dew point is not affected by temperature, but it is affected by pressure;
Saturated water vapor pressure: the pressure generated under saturated air, the saturated water vapor pressure indirectly reflects the water vapor pressure in the atmosphere, which is the coefficient of temperature. The higher the temperature, the greater the number of water molecules in the air, and vice versa;
Specific humidity: the ratio of the volume of water vapor in wet air to the volume of dry air;
Water vapor mole fraction: The ratio of the number of moles of water vapor to the total moles.
The constant temperature and humidity test chamber humidity refers to the relative humidity. The domestic humidity range is generally 30%-98% or 20%-98%RH, and it can also be achieved or 10%. Relatively speaking, the cost will vary.
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