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Specification

The detector is an industrial standard model of a Geiger-Mü ller tube, with a thin mica output window.
It is factory-calibrated using a pulse generator, and is usually ± 15% of the full scale relative to Cesium-137.
It carries out detections in milliroentgens/ hour and in events/ minute ( cpm) in three different measurement intervals. The unit is protected by an antisaturation circuit up to a value equivalent to 100 times the maximum reading in the greatest interval. The radiation detected is indicated by the hand moving on the graduated scale, a blinking LED and an audible beeper.