| Detector | Model | Relative Eff (%) | FWHM (keV) | Muon Guard |
| Co-60 (1332.5 keV) | ||||
| GE03 | GC10020 | 100 | 1.98 | Top |
| GE08 | GC10021 | 100 | 2.06 | Top |
| GE09 | GC13021 | 130 | 2.06 | Top |
| GE12 | GX13023 | >130 | 2.43 | All 4 sides plus Top |
| GE11* | GC8021 | 80 | 1.82 | No |