Berthold

Brand

	LB 147	LB 147 Slim	LB 148	Alpha Sense
ZnS detector	✓	✓	✓	✓
Number of detectors	4	4	6	45022
Removable hand probe for clothing measurements	✓	✓	✓	✓
Weight (approx. in kg)	35	35	45	35 / 45
Dimensions (without alarm tower)	65 x 125 x 80	45 x 125 x 90	85 x 125 x 82	240 x 140 x 110
(W x H x D) in mm
Interfaces	USB, Ethernet, RS232, RS485	USB, Ethernet, RS232, RS485	USB, Ethernet, RS232, RS485	USB, Ethernet, RS232, RS485
Mobile set (fixed rollers)	opt.	opt.	✓	opt. / ✓


Hand Detectors

Detector	ZnS(Ag) scintillator with light-tight Hostaphan foil
Dimensions entrance window	150 mm x 230 mm
Senstive area	345 cm2
Typical background
α-channel	approx. 0.1 cps
β-channel	approx. 15 cps


Typical efficiencies (ISO 7503-1)
	LB 147 / LB 148	Alpha Sense Version
14C	20 %	0,25
36Cl	0,49	0,7
90Sr / 90Y	0,52	0,66
241Am	0,33	0,43


Typical detection limits (ISO 7503-1) with 10 s measuring time in Bq/cm2
	LB 147 / LB 148	Alpha Sense Version
14C	0.649	0.460
36Cl	0.135	0.078
90Sr / 90Y	0.126	0.088
241Am	0.026	0.019


Foot Detectors

Detector	ZnS(Ag) scintillator with light-tight Hostaphan foil
Dimensions entrance window	150 mm x 370 mm
Senstive area	555 cm2
Typical background
α-channel	approx. 0.2 cps
β-channel	approx. 40 cps


Typical efficiencies (ISO 7503-1)

	LB 147 / LB 148	Alpha Sense Version
14C	0,21	0,21
36Cl	0,54	0,71
90Sr / 90Y	0,43	0,64
241Am	0,19	0,4
Typical detection limits (ISO 7503-1) with 10 s measuring time in Bq/cm2

	LB 147 / LB 148	Alpha Sense Version
14C	0.954	0.961
36Cl	0.191	0.137
90Sr / 90Y	0.254	0.153
241Am	0.055	0.026