Hygrometer

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Hygrometer

Wet and dry bulb thermometer

hygrometer

An hygrometer is composed by two different thermometer:

1. dry bulb thermometer
2. wet bulb thermometer

It measure the relative humidity, that is to say the ratio between the vapor pressure at wet bulb temperature and the vapor pressure at dry bulb temperature, showed in percentage.

HISTORy

When it was invented?

Most developed electronics hygrometers was invented

20th century

William Cullen and Joseph Black introduced the wet and dry bulb hygrometer

1755

Francesco Folli developed a more pratical version of hygrometer

1600s

Da Vinci invented first rudimental hygrometer

1480

how it works?

Dry bulb

As I said hygrometer is composed by dry and wet bulb. Dry bulb simply measures ambient air temperature in degrees Celsius, degrees Fahrenheit or Kelvin.

wet bulb

It consists in a bulb wrapped into a moist cloth. As water evaporates from the cloth, it cools the thermometer bulb, resulting in a lower temperature reading than that of the dry bulb thermometer

METEREOLOGY

In Heating, Ventilation, and Air Conditioning Hygrometer is used to monitor indoor humidity levels.

In research related to human comfort, double bulb hygrometers help evaluate how temperature and humidity interact to affect thermal comfort levels in indoor environments.

APPLICATIONS

COMFORT STUDIES

Farmers use double bulb hygrometers to assess humidity conditions for crop management. Understanding humidity levels helps in irrigation planning and frost protection strategies

AGRICULTURE

HVAC

Double bulb hygrometers are extensively used in meteorology for measuring atmospheric humidity. They help in weather forecasting by providing essential data on moisture levels in the air

In which subjects is it used?

weboGRAPHY

Britannica.com Meteosvizzera.admin.ch Elcometer.com Greenly.earth Mcscientific.com.au Byjus.com