Open on 26, 27 and 28 December / Closed 24, 25, 31 December and 1 and 2 January

Machinery Resale will be at MATEXPO 2017. Visit us and discover our range of NEW machines. Stand 211B. Order here your free entrance ticket.

The term for the amount of water vapor in air is called humidity. Just to be clear, “humid air” is not the same as “moist air” (which is a mixture of water vapor and other substances or particles in the air). Humidity is defined in terms of the water part of this mixture, it is called the "absolute humidity". It is commonly referred to as relative humidity, expressed as a % (like on household humidistats). It is called relative because it measures the absolute humidity relative to the maximum. Imagine a cube of 1 metre by 1 metre by 1 metre filled with air. The temperature is 16° Celsius, and the weather is fair. That cube contains one cubic metre of air, which is also saturated with water vapor.