Tel: 01270 757400
Email: mail@fileng.com
The air around us contains millions of small particles in every cubic metre of air. We can easily divide this contamination into settling and unsettling impurities, and present a range of airborne particulate in a visual format as illustrated below.
Particle diameter (micron)
To illustrate the relationship between count, area and weight of dust in air we can consider the following well-known work by Dr. Wiley.
A Sample of Atmospheric Air
Count curve: Measured with electron microscope
Area curve: Calculated
Weight curve: Solid section measured by sedimentation,
dotted section calculated.
Count = 99.95% < 1mm
Area = 80% < 1mm
Weight = 30% < 1mm
You will note that only a fraction of the dust by count – that quantity
above one micron in size, accounts for the majority of the weight and dust
in the air.
Design, installation and management of air quality control systems
Air filtration products, Air conditioning, Mini-environments,
Isolation containment, Air process hardware, Consultancy,
Re-commissioning