To assess a radiation contamination of the environment the easiest instrument is the evaluation of the external gamma radiation. The next important assessment of the environment is the aerosol activity which finally in the air of the ground-level atmosphere is inhaled by people for this is all above the alpha- and beta activity the criterion.

The use of aerosol measuring instruments, which are able to work under the same conditions as the gamma stations so far failed primarily on the price and the possibility of establishing such facilities outdoor.

The ERAC is a fully automatic continuously working measuring instrument for the measuring of the  alpha and beta activity as well as the gamma radiation which can be used both in radiation early warning systems and for the monitoring of radon concentration in buildings and outdoor.

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date: 23. September 2009