Gamma Detectors

Energy Compensated GM Detectors

Model Application Linear Range w/ DTC Background Sensitivity Energy Response

44-183

M44-183

 shielded directional gamma survey
 1 mR/hr-
10 R/hr		 10:1 ratio front to back 100 cpm/mR/hr ± 15%

133-2

M133

 

 gamma survey, dose rate
 0.1 mR/hr-
1 R/hr		 12 cpm @ 10 µR/hr 1000 cpm/mR/hr
 ± 25%

133-4

M133

 gamma survey, dose rate
 1 mR/hr-
10 R/hr		 1 cpm @ 10 µR/hr 100 cpm/mR/hr
 ± 15%

133-6

M133

 gamma survey, dose rate
 4 mR/hr-
40 R/hr
 1 cpm
 18 cpm/mR/hr
 ± 15%

133-7

M133

 gamma survey, dose rate
 25 mR/hr-
100 R/hr
 < 1 cpm 4.2 cpm/mR/hr ± 15%

133-8

M133

 gamma survey, dose rate
 150 mR/hr-
1000 R/hr
 1 cpm
 0.7 cpm/mR/hr
 ± 25%

44-9DOSE

M44-9DOSE

 gamma survey, dose rate
 0-300 mR/hr
 60 cpm 3300 cpm/mR/hr ± 20%

44-9EXP

M44-9EXP

 gamma survey, dose rate
(ambient equivalent)
0-3 mSv/hr		 60 cpm
 3300 cpm/mR/hr
 ± 20%

 

Scintillator Detectors

Model Application Detector Type Window Efficiency Background Sensitivity

44-3

M43-2

 125I low energy gamma survey 10-60 keV 1 in. dia x 1 mm thick NaI(Tl) 18.4mg/cm2

33.5%-125I,

18%-129I

 675 cpm/µR/hr (125I)

44-17

M43-2

 125I low energy gamma survey 10-200 keV
 2 in. dia x 2 mm thick NaI(Tl)
 43 mg/cm2 38%-125I, 22%-129I
 2500 cpm/µR/hr (125I)

44-2

M43-2 

 gamma survey, 50 keV-1.5 MeV 1 in. dia x 1 in. thick NaI(Tl)     1900 cpm 175 cpm//µR/hr (137Cs)

44-10

M43-2 

 gamma survey, 50 keV-3.0 MeV  2 in. dia x 2 in. thick NaI(Tl)     9750 cpm 900 cpm//µR/hr (137Cs)

44-62

M43-2 

 gamma survey, 50 keV-1.5 MeV 0.5 in. dia x 1 in. thick NaI(Tl)     600 cpm 49 cpm//µR/hr (137Cs)

44-11

m44-11

 gamma survey  2 in. dia x 2 in. thick NaI(Tl) integral lline
      9750 cpm 900 cpm//µR/hr (137Cs)

44-20

m44-11

 gamma survey 3 in. dia x 3 in. thick NaI(Tl) integral lline     23000 cpm

2300 cpm//µR/hr (137Cs)