Ludlum Model 44-2 Gamma Radiation Scintillation Detector - 1" x 1" NaI

The Ludlum Model 44-2 is a 1" X 1" NaI(Tl) gamma radiation scintillation detector that can be used with several different instruments including radiation survey meters, scalers, ratemeters, and alarm ratemeters.

Ludlum Model 44-3 Gamma Radiation Scintillation Detector - 1" x 1mm NaI

The Ludlum Model 44-3 is a 1" X 1mm NaI(Tl) gamma radiation scintillation detector for low energy radiation that can be used with several different instruments including radiation survey meters, scalers, ratemeters, and alarm ratemeters for ¹²⁵I and x-ray survey.

Ludlum Model 44-10 Gamma Radiation Scintillation Detector - 2" x 2" NaI

The Ludlum Model 44-10 is a 2" X 2" NaI(Tl) gamma radiation scintillation detector that can be used with several different instruments including radiation survey meters, scalers, ratemeters, and alarm ratemeters for high energy gamma radiation detection.

Ludlum Model 44-11 Gamma Radiation Scintillation Detector - 2" x 2" Integral NaI

The Ludlum Model 44-11 is an integral 2" X 2" NaI(Tl) gamma radiation scintillation detector that can be used with several different instruments including radiation survey meters, scalers, ratemeters, and alarm ratemeter for high energy gamma radiation detection.

Ludlum Model 44-17 Gamma Radiation Scintillation Detector - 2" x 2mm NaI

The Ludlum Model 44-17 is a low energy gamma radiation scintillation detector with a 2" X 2mm NaI(Tl) crystal that can be used with several different instruments including radiation survey meters, scalers, ratemeters, and alarm ratemeters for ¹²⁵I and x-ray survey.

Ludlum Model 44-20 Gamma Radiation Scintillation Detector - 3" x 3" Integral NaI

The Ludlum Model 44-20 is an integral 3" X 3" NaI(Tl) gamma radiation scintillation detector that can be used with several different instruments including radiation survey meters, scalers, ratemeters, and alarm ratemeters for high energy gamma radiation detection.

Ludlum Model 44-62 Gamma Radiation Scintillation Detector - ½" x 1" NaI

The Ludlum Model 44-62 is a 1/2" X 1" NaI(Tl) gamma radiation scintillation detector that can be used with several different instruments including radiation survey meters, scalers, ratemeters, and alarm ratemeters for high energy gamma radiation detection.

Ludlum Model 44-172 Gamma Radiation Scintillation Detector - 1" x 1mm YSO

The Ludlum Model 44-172 YSO (Yttrium Oxyorthosilicate) gamma radiation scintillation detector is used primarily for the detection of low-energy gamma radiation, from approximately 5 keV to 145 keV. The Model 44-172 will also detect beta energy as low as 49 keV.

Ludlum Model 44-183 Gamma Radiation Shielded G-M Detector

The Ludlum Model 44-183 facilitates gamma radiation surveys in high-background environments and in areas where elevated radiation fields are directional.  The detector design incorporates lead shielding that results in a 10:1 reduction in sensitivity from gammas entering in any direction but the bottom face.

Ludlum Model 133-2 Gamma Radiation Energy Compensated G-M Detector

• Linear Range without Dead Time Correction: 0.1 mR/hr - 200 mR/hr

• Linear Range with Dead Time Correction: 0.1 mR/hr - 1 R/hr

• Sensitivity (Cs-137): 1000 cpm/mR/hr

• Waterproof Version Available

Ludlum Model 133-2-1 Gamma Radiation Energy Compensated G-M Detector

• Waterproof Version of Model 133-2

• 100 ft. of Cable Included

• Linear Range without Dead Time Correction: 0.1 mR/hr - 200 mR/hr

• Linear Range with Dead Time Correction: 0.1 mR/hr - 1 R/hr

• Sensitivity (Cs-137): 1000 cpm/mR/hr

Ludlum Model 133-4 Gamma Radiation Energy Compensated G-M Detector

• Linear Range without Dead Time Correction: 1 mR/hr - 2 R/hr

• Linear Range with Dead Time Correction: 1 mR/hr - 10 R/hr

• Sensitivity (Cs-137): 100 cpm/mR/hr

• Waterproof Version Available

Ludlum Model 133-4-1 Gamma Radiation Energy Compensated G-M Detector

• Waterproof Version of Model 133-4

• 100 ft. of Cable Included

• Linear Range without Dead Time Correction: 1 mR/hr - 2 R/hr

• Linear Range with Dead Time Correction: 1 mR/hr - 10 R/hr

• Sensitivity (Cs-137): 100 cpm/mR/hr

Ludlum Model 133-6 Gamma Radiation Energy Compensated G-M Detector

• Linear Range without Dead Time Correction: 4 mR/hr - 6 R/hr

• Linear Range with Dead Time Correction: 4 mR/hr - 40 R/hr

• Sensitivity (Cs-137): 18 cpm/mR/hr

• Waterproof Version Available

Ludlum Model 133-6-1 Gamma Radiation Energy Compensated G-M Detector

• Waterproof Version of Model 133-6

• 100 ft. of Cable Included

• Linear Range without Dead Time Correction: 4 mR/hr - 6 R/hr

• Linear Range with Dead Time Correction: 4 mR/hr - 40 R/hr

• Sensitivity (Cs-137): 18 cpm/mR/hr

Ludlum Model 133-7 Gamma Radiation Energy Compensated G-M Detector

• Linear Range without Dead Time Correction: 25 mR/hr - 30 R/hr

• Linear Range with Dead Time Correction: 25 mR/hr - 100 R/hr

• Sensitivity (Cs-137): 4.2 cpm/mR/hr

• Waterproof Version Available

Ludlum Model 133-7-1 Gamma Radiation Energy Compensated G-M Detector

• Waterproof Version of Model 133-7

• 100 ft. of Cable Included

• Linear Range without Dead Time Correction: 25 mR/hr - 30 R/hr

• Linear Range with Dead Time Correction: 25 mR/hr - 100 R/hr

• Sensitivity (Cs-137): 4.2 cpm/mR/hr

Ludlum Model 133-8 Gamma Radiation Energy Compensated G-M Detector

• Linear Range without Dead Time Correction: 150 mR/hr - 300 R/hr

• Linear Range with Dead Time Correction: 150 mR/hr - 1000 R/hr

• Sensitivity (Cs-137): 0.7 cpm/mR/hr

• Waterproof Version Available

Ludlum Model 133-8-1 Gamma Radiation Energy Compensated G-M Detector

• Waterproof Version of Model 133-8

• 100 ft. of Cable Included

• Linear Range without Dead Time Correction: 150 mR/hr - 300 R/hr

• Linear Range with Dead Time Correction: 150 mR/hr - 1000 R/hr

• Sensitivity (Cs-137): 0.7 cpm/mR/hr