Radiation Alert^® Area Monitor Comparison

Scintillation Based Model

Operating Range

Probe Type

Sensitivity (Cs137)

Energy
Response

Max Cable Length

AM 1X1

0.1 to 10 mR/hr

0.1  – 100 µSv/hr

1X1 Nal(Tl)Crystal

>18,000 CPM/mR/hr

Very Sensitive

30 KeV – 2 MeV

50 ft for External Scintillation Detectors

AM 1X1-EXT

AM 1X1-BOX

AM 2X2-EXT

0.1 to 2 mR/hr

0 – 20 µSv/hr

2X2 Nal(Tl)Crystal

>90,000 CPM/mR/hr

Most Sensitive

AM 2X2-BOX

Geiger Müller Based Model

Operating Range

Probe Type

Sensitivity (Cs137)

Energy

Response

Max Cable Length

AM 7128

0.1 – 200 mR/hr

0.1 – 2000 µSv/hr

Halogen-quenched Geiger Müller
Tube

18 cps/mR/hr90 MicroSec
Dead-Time

> 40 KeV

150 ft

AM 7128-EXT

AM 71313

0.1 to 1500 mR/hr

0.1 – 15,000 µSv/hr

7.5 cps/mR/hr45 MicroSec
Dead-Time

AM 71313-EXT

AM 7149

0.2 – 16,000 mR/hr

0.1 – 160,000 µSv/hr

1.5 cps/mR/hr15 MicroSec
Dead-Time

> 30 Kev

AM 7149-EXT