The development of the Clearance Monitor was initiated upon new clearance regulations in Germany (Radiation Protection Ordinance 2001 § 29).

The Monitor consists of a mobile detection unit with a measurement volume of 150 liters and an evaluation PC.

Six large area Xenon counter tubes measure both, Beta and Gamma radiation.

The approximate 4-pi geometry ensures a high sensitivity and a very good independence of the spatial distribution of the radioactivity in the waste container.

The weight is automatically taken into account by means of an integrated load cell scale. The measurement data are collected in the PC and are stored into a data base.

For radionuclides like ¹¹C, ¹⁸F, ⁵⁷Co, ⁹⁰Sr, ^99mTc, ¹¹¹In, ^125I or ¹³¹I in typical waste containers filled with low density waste it is possible to attain within minutes reliable Detection limits below 0.2 Bq/g.

The monitor also measures simultaneously the surface contamination of the container on all sides.

Comprehensive and flexible report protocols and labels make the Administrative tasks of the Clearance measurement easy.