AIR XS USER MANUAL
31
16. GLOSSARY AND DEFINITIONS
Flow rate
The volume of air mixture which passes per unit time
Particles/litre
Particles per litre of air that passes through the sensing element
IP
Ingress Protection
µg/m³
Microgram per metre cubed. The concentration of an air pollutant
given in micrograms (one-millionth of a gram) per cubic metre of
air
mg/m³
Milligram per metre cubed. The concentration of an air pollutant
given in milligrams (one-thousandth of a gram) per cubic metre of
air
OPC
Optical particulate counter
ORT
Optical refraction technology
Particulate matter (PM)
General term for a mixture of solids and liquid droplets suspended
in the air from typical processes including combustion, industrial
activities or natural sources
PM
x
PM
x
is particulate matter x micrometer or less in diameter
