![]() ![]() The dew point is then determined in the device from both values. Measuring ranges of the dewpoint thermometer To determine the dew point, the dew point measuring instrument must be able to register the temperature and humidity content of the air. Then it must be checked whether the endangered areas can be heated or whether it is possible to switch to moisture-insensitive materials. In some cases the change of temperature and humidity of the air is not possible or not desired. These are the two values that the room user can usually influence by heating and ventilating. It is helpful that the dew point thermometer always measures the air temperature and humidity to determine the dew point temperature. Dew point thermometers are often used to exclude condensation as a cause of moisture damage in buildings. If you determine with a dewpoint meter that there is a risk of condensation, you can either raise the temperature above the dew point or lower the humidity. To be able to take remedial action in critical areas at an early stage, dew point thermometerrs are used. The endangered materials often absorb the moisture, so that the moisture on the surface can only be detected when discoloration has already developed. Uncontrolled moisture ingress can lead to mold growth and other damage to building components, interior decoration and stored materials. The temperature from which the condensation water precipitates is called dew point temperature or dew point. If you know the temperature and moisture content of the air, you can determine the minimum temperature of surfaces to prevent the condensation formation on them. Whether the condensation occurs depends on how much water vapor is contained in the air and how far the air is cooled down. Also on cold water pipes that lead through warmer areas and on tiles, windows and mirrors in bathrooms, condensation is often visible after showering. For example, the lenses of the glasses can fog up when you come from the cold into the heated rooms. It is not necessary to cool down the entire air, it is sufficient that the air passes by small cold surfaces. Since warm air can absorb more moisture than cold air, condensation or condensation water is formed when the humid air is cooled down. Other names for this liquid formed from the humidity in the air are condensate or condensation water. Condensation water, on the other hand, is the water that settles as the liquid on the inner side of tents or on cool glass or metal. ![]() Dew drops are the visible drops of water that can often be seen on the grass in the morning, even when it has not rained. On the other hand, the water that has become liquid from the gaseous phase is also called dew or condensation. The term thawing stands for the transition from the solid to the liquid phase. For the transition from one state to the other, there are the generally used terms freezing, thawing, evaporation, evaporation. The temperature of the metal at this state represents the dew point temperature.Įveryone knows the three states of aggregation of water: solid, liquid and gaseous. One possibility to measure the dew point temperature is to let metal cool down until its surface is steamed with water vapour. When the dew point temperature and the air temperature are known, meteorological phenomena like fog, dew or rain can be predicted in many cases. With a dewpoint meter, you can determine the dew point temperature and the air temperature, so that you can always keep the environmental circumstances in mind and prevent undesirable condensation which might cause damage to electrical devices or injuries.Ī dew point thermometer can also be used to forecast the weather to a certain degree. The dew point temperature does not depend on the current temperature. If the air temperature falls below the dew point temperature, the water begins to condense. The dew point temperature is the temperature (at a specific atmospheric pressure) at which the air is completely saturated with water. You can change the display option by changing the number in the box above.Įntering a zero eliminates all formatting.Here you can find a dew point thermometer for measuring the temperature, the relative humidity and the dew point temperature. The default numeric display is 3 significant figures. Now we put the value of 'n' into the second equation: The air temperature is 20° Celsius and the relative humidity is 50%. Let's calculate a dew point using the equation above. Whenever the relative humidity is less than 100% the dew point is always less than the air temperature. When the dew point equals the temperature, the relative humudity is 100%. Dew point is defined as the temperature at which dew will form. ![]()
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