Real-time measurement range of 0-99.99 /h and cumulative range of 0-999.9 / -compensated tube for accurate detection of hard rays, gamma rays, and X-rays. Data logging capability with storage for up to 1000 sets of measurements. Wide range from 20 keV to 3.0 MeV with a sensitivity of 80 cpm/μSv (Co-60). Operates in a temperature range of -20 to 60°C and measures humidity from 0-100% with high accuracy., Weight: 1.984160358 Pounds, Manufacturer: Gishbjka