Like in a Hygrometer to measure humidity you use percentage (%)
Its used to measure the amount of moisture in the air.
There is no difference, a psychrometer is a type of hygrometer.
A hydrometer looks like a thermometer only that it is more advanced. This is an instrument which is used to measure specific gravity.
One of the better ways would be to use a sling psychrometer.
Humidity
Humidity
The unit for a sling psychrometer is degrees Celsius (°C) for measuring air temperature and percentage (%) for measuring relative humidity.
It measures humidity
The temperature and dewpoint of the air (degrees), eventually indicating the relative humidity (percent). Both are dimensionless numbers ... they have no units.
psychrometer
Relative humidity
Like in a Hygrometer to measure humidity you use percentage (%)
The sling psychrometer was invented in 1887 by Adolph Richard Assmann, a German meteorologist. It is a simple instrument used to measure the relative humidity of the air.
Its used to measure the amount of moisture in the air.
A device used to measure humidity is called a psychrometer or hygrometer.
Because u have to put it in water then spin it around