System LB 165:
Counting gas                        Xenon     
Entrance window                   12 µm Titanium
Beta-Background                  150 cps
Eff. (Sr-90+Y90) for beta's     35 %
Eff. (AM-241) for alpha's        N/A
Weight                                 17 kg

System LB 166:
Counting gas                        P-10 Flow-through     
Entrance window                   3 µm Mylar
Beta-Background                  100 cps
Eff. (Sr-90+Y90) for beta's     45 %
Eff. (AM-241) for alpha's        25 %
Weight                                 24,5 kg

LB 165 and LB 166:
External dimensions              700 mm x 600 mm
Active Surface                      570 mm x 380 mm