放射性是不稳定原子核因辐射失去能量的过程。它以Becquerels（BQ）进行测量。
1 mSv = 0.001 cps
1 cps = 1,000 mSv
例子:
将15 毫米转换为每秒计数：
15 mSv = 0.015 cps
| 毫米 | 每秒计数 |
|---|---|
| 0.01 mSv | 1.0000e-5 cps |
| 0.1 mSv | 0 cps |
| 1 mSv | 0.001 cps |
| 2 mSv | 0.002 cps |
| 3 mSv | 0.003 cps |
| 5 mSv | 0.005 cps |
| 10 mSv | 0.01 cps |
| 20 mSv | 0.02 cps |
| 30 mSv | 0.03 cps |
| 40 mSv | 0.04 cps |
| 50 mSv | 0.05 cps |
| 60 mSv | 0.06 cps |
| 70 mSv | 0.07 cps |
| 80 mSv | 0.08 cps |
| 90 mSv | 0.09 cps |
| 100 mSv | 0.1 cps |
| 250 mSv | 0.25 cps |
| 500 mSv | 0.5 cps |
| 750 mSv | 0.75 cps |
| 1000 mSv | 1 cps |
| 10000 mSv | 10 cps |
| 100000 mSv | 100 cps |
规则