Automatic detection of power in the air over the concentration of ... personal dose X, γ-ray and hard to monitor β-ray radiation protection for nuclear power plants, accelerators, isotope applications, industrial X, γ nondestructive testing, medical radiation, cobalt ... ≤ ± 10% 15. measuring time: measuring time automatically selected based on ray intensity, faster response 16. alarm threshold: 0.5,1.0 ...