| detector | metal GM counter tube |
| type of radiation | X、γ |
| measurement type | total counting cnt、counting rate cps、activity Bq |
| measurement range | 1~104 cps、1~105 Bq |
| energy response | 60 keV – 1.3MeV |
| sensitivity | 137Cs ≥ 1000 cps/MBq |
| background counting rate | < 5 cps |