Concept: Beta ray attenuation in the measurementmethod vocabulary

Concept URI	http://dd.eionet.europa.eu/vocabulary/aq/measurementmethod/BETA
Preferred label	Beta ray attenuation
Definition	The instrument's primary operating mechanism is the radiometric microbalance system, which relies on changes in the strength of a beta ray beam passing through the filter paper to determine changes in particulate mass collected. A Beta Attenuation Monitor is comprised of three main components: the PM air inlet, the central instrument, and the vacuum pump.
Notation	BETA
Status	Valid
Status Modified	2013-03-22
Accepted Date	2013-03-22
Not Accepted Date
Scope note	Measurement of Particulate Matter (PM10, PM2.5 & PM1)