Psychrometer – a device for determining the relative humidity. Do it yourself psychrometer, it’s not difficult: fix two alcohol thermometers on the stand next to it.
(do not use mercury thermometers, if the mercury thermometer breaks due to carelessness; mercury can be poisoned). Wrap the ball of one tightly with gauze and lower it into a container with water, the other should be dry.The relative humidity is determined from the table
The difference between the readings of both thermometers is an indicator of humidity. A wet bulb temperature will be lower than a dry bulb.For example, on a wet 9 * C, on a dry 12 * C, the temperature difference is 3 * C.We find in the table the intersection of the readings of the wet-bulb thermometer 9 * C and the difference between the readings of the dry and wet-thermometers 3 * C, we obtain a humidity of 65%.
That’s all ! Do it yourself psychrometer is ready.
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