What’s the Purpose and Use of a Psychrometer?

The natural way of water is that when it vaporises, it eventually cools down on the surface where it sits. The best example of this is when your sweat cools your body when it evaporates. However, it is worth mentioning that the air will only accommodate a specific amount of water. Once it becomes humid, it will increase its level of saturation, causing it to have a difficult time to vaporise. While you may be confused as to why we’re talking about this, the reason is that the process involved in vaporisation is what psychrometers use.


The typical psychrometer is a kind of hygrometer and is designed for determining the moisture content or relative humidity found in the air. The oldest types of psychrometers were known for their traditional humidity measurement which utilised electronic sensors. The sensors detect changes in the electrical resistance and capacitance instead of the modern way of relying on condensation temperature.



It is interesting to note though that traditional psychrometers are still being utilised in various industrial settings and they come in mobile and stationary variants. Also, the psychrometer is quite a useful instrument you can use at home. The reason is that you get to use it for measuring the quantity of water vapour in the air as well as its relative humidity.


Relative humidity refers to the moisture content found in the air in comparison to the moisture that the air can hold for a particular temperature. It is crucial to know about relative humidity if you are trying to figure out weather patterns. The psychrometer is the ideal device for counting wet as well as dry bulb temperatures.


Know that in the usual situation, you need two separate thermometers to count the temperatures. You need to obtain wet and dry bulb temperatures to know the exact figures for relative humidity. The advantage of a psychrometer is that it contains a thermometer with a dry and wet bulb measurement capability. The dry bulb will measure temperature and is given maximum exposure to the air by not covering it. On the other hand, the wet bulb requires liquid to keep it damp.


You also must be aware that getting an accurate reading for relative humidity and dew point using the psychrometer will need calculations that could eat up countless hours, especially if you don’t use some essential software. Therefore, it is advised that you take advantage of a psychometric chart that can conveniently be downloaded online. It will require you to locate your readings, and they match them to the relative humidity you measured.


Finally, do not forget that psychrometers can measure the humidity level in a general environment or a specific area. The same device is even useful in laboratory environments, specifically in getting accurate measurements in chemical reactions as well as in experiments.