MONITORS AND REGULATION APPARATUS FOR INDUSTRIAL AUTOMATION; NAMELY, INSTRUMENTS FOR LOW LEVELS OF RADIOACTIVITY COUNTING, DISCRIMINATION AND SPECTROMETRY OF ALPHA AND BETA PARTICLES; MONITORS, GAUGES AND REGULATION APPARATUS FOR THE MEASUREMENT OF RADIOACTIVITY; NAMELY, INSTRUMENTS FOR LOW LEVELS OF RADIOACTIVITY COUNTING, DISCRIMINATION OF SPECTROMETRY OF PARTICLES FOR SECURITY AND SAFETY PURPOSES; INSTRUMENTS FOR SAMPLING WATER AND FILL UP CONTAINERS ACCORDING TO PREDEFINED CONDITIONS; INS...