Dampness of air.


Related Terms

MOIST ROOM

An enclosed space that is maintained at a specified temperature, usually 73 F (23 C), with the humidity maintained at 98% or above and that is used to cure and store test specimens of cementitious material.

HYGROMETRY

The study which treats of the measurement of the humidity of the atmosphere and other gases.

HYDROTREATING

[CHEMENG] Oil refinery catalytic process in which hydrogen is contacted with petroleum intermediate or product streams to remove impurities, such as oxygen, sulfur, nitrodirect indication of the amount of moisture in the air or other gas, the indication usually being in terms of relative humidity as a percentage which the moisture present bears to the maximum amount of moisture that could be present at the location temperature without condensation taking place.

CLEAN ROOM

A facility or enclosure in which air content and other conditions (such as temperature, humidity, and pressure) are controlled and maintained at a specific level by special facilities and operating processes and by trained personnel.

ASPIRATING PSYCHROMETER

A device which draws sample of air through it to measure humidity.

SLING PSYCHROMETER

Measuring device with wet and dry bulb thermometers. Moved rapidly through air it measures humidity.

CRITICAL HUMIDITY

The relative humidity above which the atmospheric corrosion rate of some metals increase sharply.

TEMPERATURE-HUMIDITY INDEX

Actual temperature and humidity of air sample compared to air at standard conditions.

BAROTHERMOHYGROGRAPH

An instrument which automatically records pressure, temperature and humidity of the atmosphere

MARINE CLIMATE

The type of climate characteristic of coastal areas, islands, and the oceans, the distinctive features of which are small annual and daily temperature range and high relative humidity in contrast with CONTINENTAL CLIMATE, which is characteristic of the interior of a large landmass, and the distinctive features of which are large annual and daily temperature range and dry air with few clouds.

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