It measures humidity
Relative humidity
A
There are a lot of places to buy a sling psychrometer. Any company which sells scientific equipment should have them, or one could buy it from Amazon or Bacharach.
hygrometer psychrometer
when was the sing psychrometer invente
A sling psychrometer (which is a hygrometer) measures the moisture content of the atmosphere surrounding it. It is called a sling psychrometer because it is whirled around in the air until a constant value/reading is obtained from the wet-bulb thermometer.
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It measures humidity
A
Relative humidity
There are a lot of places to buy a sling psychrometer. Any company which sells scientific equipment should have them, or one could buy it from Amazon or Bacharach.
it has changed a lot
hygrometer psychrometer
100 %
One of the better ways would be to use a sling psychrometer.
If a dry wick is present the temperature shown on both thermometers will be the same. This data, when entered into the psychrometric chart, will indicate that the air has 100% relative humidity.