Detectors

Nuclear Dynamics Pty Ltd supplies Ludlum radiation detectors in South Africa.
Radiation detectors for monitoring, contamination checks, sample counting and measurement applications.

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Alpha Alpha-Beta Alpha-Beta-Gamma Beta Gamma GM Gamma Scintillator Low-Energy Gamma Scintillator Neutron Sample Counter Heads Sample Holders

Alpha

Ludlum Model 43-1

Ludlum Model 43-1

  • ZnS(Ag) Scintillator
  • 83 cm² (12.9 in²)
  • 239Pu : 33%
Ludlum Model 43-2

Ludlum Model 43-2

  • ZnS(Ag) Scintillator
  • 9.7 cm² (1.5 in²)
  • 239Pu : 30%
  • 230Th : 30%
Ludlum Model 43-202

Ludlum Model 43-202

  • ZnS(Ag) Scintillator
  • 17.8 cm² (2.8 in²)
  • 239Pu : 18%
Ludlum Model 43-5

Ludlum Model 43-5

  • ZnS(Ag) Scintillator
  • 76 cm² (11.9 in²)
  • 239Pu : 13%
Ludlum Model 43-65

Ludlum Model 43-65

  • ZnS(Ag) Scintillator
  • 63 cm² (9.8 in²)
  • 239Pu : 17%
  • 230Th : 17%
Ludlum Model 43-90

Ludlum Model 43-90

  • ZnS(Ag) Scintillator
  • 125 cm² (19.4 in²)
  • 239Pu : 20%
Ludlum Model 43-92

Ludlum Model 43-92

  • ZnS(Ag) Scintillator
  • 100 cm² (15.5 in²)
  • 239Pu : 20%
Ludlum Model 43-136

Ludlum Model 43-136

  • ZnS(Ag) Scintillator
  • 65.3 cm² (10.1 in²)
  • 239Pu : 20%
Ludlum Model 43-44

Ludlum Model 43-44

  • Air Proportional
  • 76 cm² (11.8 in²)
  • 239Pu : 8%
Ludlum Model 43-44-1

Ludlum Model 43-44-1

  • Air Proportional
  • 154 cm² (23.9 in²)
  • 239Pu : 8%

Alpha-Beta

Ludlum Model 43-1-1

Ludlum Model 43-1-1

  • ZnS(Ag) + Plastic Scintillator
  • 83 cm² (12.9 in²)
  • 239Pu : 30%
  • 90Sr/90Y : 30%
  • 14C : 4%
Ludlum Model 43-2-2

Ludlum Model 43-2-2

  • ZnS(Ag) + Plastic Scintillator
  • 9.7 cm² (1.5 in²)
  • 239Pu : 25%
  • 90Sr/90Y : 20%
  • 14C : 5%
Ludlum Model 43-65-2

Ludlum Model 43-65-2

  • ZnS(Ag) + Plastic Scintillator
  • 63 cm² (9.8 in²)
  • 230Th : 20%
  • 239Pu : 20%
  • 99Tc : 15%
  • 90Sr/90Y : 20%
  • 14C : 1%
Ludlum Model 43-89

Ludlum Model 43-89

  • ZnS(Ag) + Plastic Scintillator
  • 125 cm² (19.4 in²)
  • 239Pu : 20%
  • 99Tc : 10%
  • 90Sr/90Y : 20%
Ludlum Model 43-93

Ludlum Model 43-93

  • ZnS(Ag) + Plastic Scintillator
  • 100 cm² (15.5 in²)
  • 239Pu : 20%
  • 99Tc : 15%
  • 90Sr/90Y : 20%
Ludlum Model 43-147

Ludlum Model 43-147

  • ZnS(Ag) + Plastic Scintillator
  • 200 cm² (31.0 in²)
  • 239Pu : 20%
  • 99Tc : 13%
  • 90Sr/90Y : 20%
Ludlum Model 43-68

Ludlum Model 43-68

  • Rechargeable Gas Proportional
  • 126 cm² (19.5 in²)
  • 239Pu : 20%
  • 14C : 15%
  • 99Tc : 30%
  • 90Sr/90Y : 20%
  • Gamma : 1%
Ludlum Model 43-143-1

Ludlum Model 43-143-1

  • Gas Proportional
  • 100 cm² (15.5 in²)
  • 239Pu : 20%
  • 14C : 15%
  • 99Tc : 30%
  • 90Sr/90Y : 20%
  • Gamma : 1%
Ludlum Model 43-37 Series

Ludlum Model 43-37 Series

  • Large-Area Gas Proportional
  • 584 cm2 (90.5 in2) or 821 cm2 (127 in2)
  • Gross Counting
  • 239Pu : 20%
  • 99Tc : 30%
  • 90Sr/90Y : 30%
  • Gamma 1%
  • Alpha-Beta Counting
  • 239Pu : 17.5%
  • 99Tc : 20%
  • 90Sr/90Y : 20%
  • Gamma 1%
Ludlum Model 43-135-1

Ludlum Model 43-135-1

  • Gas Proportional
  • For Large-Area Source Calibration
  • 500 cm2 (77.4 in2)
  • Windowless
  • 239Pu : 42%
  • 230Th : 33%
  • 99Tc : 55%
  • 63Ni : 37%
  • 90Sr/90Y : 55%

Alpha-Beta-GAMMA

Ludlum Model 44-7

Ludlum Model 44-7

  • End Window GM
  • 6 cm² (0.93 in²)
  • 2100 cpm per mR/hr (137Cs)
Ludlum Model 44-9

Ludlum Model 44-9

  • Pancake GM
  • 15.5 cm² (2.4 in²)
  • 3300 cpm per mR/hr (137Cs)
Ludlum Model 44-9DOSE

Ludlum Model 44-9DOSE

  • Pancake GM
  • 15.5 cm² (2.4 in²)
  • 3300 cpm per mR/hr (137Cs)
Ludlum Model 44-9-18

Ludlum Model 44-9-18

  • Pancake GM
  • 15.5 cm² (2.4 in²)
  • 3300 cpm per mR/hr (137Cs)
Ludlum Model 44-40 Series

Ludlum Model 44-40 Series

  • Pancake GM
  • With Lead Shielding
  • 15.5 cm² (2.4 in²)
  • 3300 cpm per mR/hr (137Cs)
Ludlum Model 44-88

Ludlum Model 44-88

  • Pancake GM
  • 15 cm² (2.3 in²)
  • 3300 cpm per mR/hr (137Cs)
Ludlum Model 44-89

Ludlum Model 44-89

  • 4 Pancake GMs
  • 62 cm² (9.6 in²)
  • 13,200 cpm per mR/hr (137Cs)
Ludlum Model 44-94

Ludlum Model 44-94

  • 4 Pancake GMs
  • 62 cm² (9.6 in²)
  • 13,200 cpm per mR/hr (137Cs)
Ludlum Model 44-25

Ludlum Model 44-25

  • 2 Pancake GMs
  • Hand Monitor Detector
  • 31 cm² (4.8 in²)
  • 6600 cpm per mR/hr (137Cs)
Ludlum Model 44-26

Ludlum Model 44-26

  • 3 Pancake GMs
  • Foot Monitor Detector
  • 46 cm² (7.1 in²)
  • 9900 cpm per mR/hr (137Cs)

Beta

Ludlum Model 44-1

Ludlum Model 44-1

  • Plastic Scintillator
  • For Beta Detection
  • 9.7 cm² (1.5 in²)
  • 14C : 7%
Ludlum Model 44-21

Ludlum Model 44-21

  • NaI(Tl) + Plastic Scintillator
  • For Beta-Gamma Detection
  • 5.1 cm² (0.8 in²)
  • 14C : 4%
  • 32P : 28%
  • 125I : 38%
  • 129I : 19%
Ludlum Model 44-98

Ludlum Model 44-98

  • BGO Scintillator
  • For Beta-Gamma Detection
  • 5 cm² (0.8 in²)
  • 125I : 15%
  • 129I : 8%
  • 14C : 3%
Ludlum Model 43-65-1

Ludlum Model 43-65-1

  • Plastic Scintillator
  • For Beta Detection
  • 63 cm² (9.8 in²)
  • 99Tc : 15%
  • 90Sr/90Y : 20%
  • 14C : 1%
Ludlum Model 44-116

Ludlum Model 44-116

  • Plastic Scintillator
  • For Beta Detection
  • 125 cm² (19.4 in²)
  • 14C : 4%
  • 90Sr/90Y : 30%
  • 99Tc : 20%
Ludlum Model 44-142

Ludlum Model 44-142

  • Plastic Scintillator
  • For Beta Detection
  • 100 cm² (15.5 in²)
  • 14C : 4%
  • 90Sr/90Y : 30%
  • 99Tc : 20%
Ludlum Model 44-215

Ludlum Model 44-215

  • Plastic Scintillator
  • For Beta Detection
  • 20 cm² (3.1 in²)
  • 99Tc : 33%
  • 14C : 10%
  • 90Sr/90Y : 33%
Ludlum Model 44-92

Ludlum Model 44-92

  • Gas Proportional
  • For Beta-Gamma Detection
  • 169 cm² (26.2 in²)
  • 14C : 10%
  • 99Tc : 13%
  • 36Cl : 24%
  • 90Sr/90Y : 26%
  • 129I : 3%
  • 57Co : 1.6%
  • 55Fe : 1.2%
  • 239Pu : 10%
Ludlum Model 44-110

Ludlum Model 44-110

  • Windowless Gas Flow Proportional
  • For Tritium/Beta Detection
  • 126 cm2 (19.5 in2)
  • 3H : 25%

Gamma GM

Ludlum Model 133 Series

Ludlum Model 133 Series

  • Energy-Compensated GM
  • 133-2: 1000 cpm per mR/hr
  • 133-3: 450 cpm per mR/hr
  • 133-4: 100 cpm per mR/hr
  • 133-6: 18 cpm per mR/hr
  • 133-7: 4.2 cpm per mR/hr
  • 133-2: 0.1 to 200 mR/hr
  • 133-3: 0.1 mR/hr to 1 R/hr
  • 133-4: 1 mR/hr to 2 R/hr
  • 133-6: 4 mR/hr to 6 R/hr
  • 133-7: 25 mR/hr to 30 R/hr
Ludlum Model 44-6

Ludlum Model 44-6

  • GM with Beta Window
  • 1200 cpm per mR/hr
  • ±10% up to 50 mR/hr
Ludlum Model 44-38

Ludlum Model 44-38

  • GM with Beta Window
  • 1200 cpm per mR/hr
  • 0.05 to 50 mR/hr
Ludlum Model 44-150 Series

Ludlum Model 44-150 Series

  • Energy-Compensated GM
  • 44-150-1: 4000 cpm per mR/hr
  • 44-150-3: 13,500 cpm per mR/hr
  • 44-150-1: 0.1 to 50 mR/hr
  • 44-150-3: 0.01 to 8 mR/hr
Ludlum Model 44-183

Ludlum Model 44-183

  • Energy-Compensated GM with Lead Shielding
  • 100 cpm per mR/hr
  • 1 mR/hr to 2 R/h

Gamma Scintillator

Ludlum Model 44-2

Ludlum Model 44-2

  • NaI(Tl) Scintillator
  • 2.5 x 2.5 cm (1 in. x 1 in.)
  • 175 cpm per µR/hr (137Cs)
  • 125I : 7%
  • 57Co : 10%
  • 137Cs : 3%
  • 60Co : 3%
Ludlum Model 44-10

Ludlum Model 44-10

  • NaI(Tl) Scintillator
  • 5.1 x 5.1 cm (2 x 2 in.)
  • 900 cpm per µR/hr (137Cs)
  • 125I : 4%
  • 57Co : 20%
  • 137Cs : 9%
  • 60Co : 15%
Ludlum Model 44-62

Ludlum Model 44-62

  • NaI(Tl) Scintillator
  • 1.3 x 2.5 cm (0.5 x 1 in.)
  • 49 cpm per µR/hr (137Cs)
Ludlum Model 44-11

Ludlum Model 44-11

  • NaI(Tl) Scintillator
  • 5.1 x 5.1 cm (2 x 2 in.)
  • 900 cpm per µR/hr (137Cs)
Ludlum Model 44-20

Ludlum Model 44-20

  • NaI(Tl) Scintillator
  • 7.6 x 7.6 cm (3 x 3 in.)
  • 2300 cpm per µR/hr (137Cs)
  • 125I : 29%
Ludlum Model 44-159-1

Ludlum Model 44-159-1

  • CsI Scintillator
  • 18 x 18 mm (0.7 x 0.7 in.)
  • 120 cpm per µR/hr
Ludlum Model 44-132

Ludlum Model 44-132

  • Plastic Scintillator
  • 14.6 x 2.5 cm (5.75 x 1 in.)
  • 1500 cpm per µR/hr

Low-Energy Gamma Scintillator

Ludlum Model 44-3

Ludlum Model 44-3

  • NaI(Tl) Scintillator
  • 2.5 x 0.1 cm (1 x 0.04 in.)
  • 5 cm² (0.8 in²)
  • 10 to 60 keV
Ludlum Model 44-17

Ludlum Model 44-17

  • NaI(Tl) Scintillator
  • 5.1 x 0.2 cm (2 x 0.08 in.)
  • 17.8 cm² (2.8 in²)
  • 10 to 200 keV
Ludlum Model 44-172

Ludlum Model 44-172

  • YSO Scintillator
  • 5 cm² (0.8 in²)
Ludlum Model 44-213

Ludlum Model 44-213

  • CsI Scintillator
  • 12.7 x 0.12 cm (5 x 0.05 in.)
  • 127 cm² (10.6 in²)
  • 10–200 keV

Neutron

Ludlum Model 42-49 Series

Ludlum Model 42-49 Series

  • 3He Tube
  • Moderator: 19.5 cm (7.7 in.) dia.
  • 42-49: 10 cpm per µSv/h (100 cpm per mrem/hr)
  • 42-49B: 4.5 cpm per µSv/h (45 cpm per mrem/hr)
  • 42-49B-1: 7.6 cpm per µSv/h (76 cpm per mrem/hr)
  • Thermal to 12 MeV
Ludlum Model 42-30H

Ludlum Model 42-30H

  • 3He Tube
  • Moderator: 25.4 cm (10 in.) dia.
  • 20,000 cpm per mSv/h (200 cpm per mrem/hr)
  • Thermal to 12 MeV
Ludlum Model 42-31H

Ludlum Model 42-31H

  • 3He tube
  • Moderator: 22.9 cm (9 in.) dia.
  • 10,000 cpm per mSv/h (100 cpm per mrem/hr)
  • Thermal to 12 MeV
Ludlum Model 42-5

Ludlum Model 42-5

  • 6LiI Scintillator
  • 45 cpm per mrem/hr
  • Thermal to 12 MeV
Ludlum Model 42-41L

Ludlum Model 42-41L

  • PRESCILA Proton Recoil Scintillator
  • 350 cpm per mrem/hr
  • Thermal to 100 MeV
Ludlum Model 42-38 WENDI-2

Ludlum Model 42-38 WENDI-2

  • 3He Tube
  • Moderator: 22.9 cm (9 in.) dia.
  • 450 cpm per mrem/hr
  • Thermal to 5 GeV

Sample Counter Heads

Ludlum Model 43-9

Ludlum Model 43-9

  • Alpha
  • ZnS(Ag) Scintillator
  • 2.5 x 0.15 cm (1 x 0.06 in.) [D x L]
  • 230Th : 30%
Ludlum Model 43-10

Ludlum Model 43-10

  • Alpha
  • ZnS(Ag) Scintillator
  • 5.7 x 1.1 cm (2.24 x 0.42 in.) [D x L]
  • 230Th : 37%
  • 239Pu : 37%
Ludlum Model 43-78

Ludlum Model 43-78

  • Alpha
  • ZnS(Ag) Scintillator
  • 12.7 x 0.46 cm (5 x 0.18 in.) [D x L]
  • 230Th : 37%
  • 239Pu : 37%
Ludlum Model 43-10-1

Ludlum Model 43-10-1

  • Alpha-Beta
  • ZnS(Ag) + Plastic Scintillator
  • 5.7 x 1.1 cm (2.24 x 0.42 in.) [D x L]
  • 239Pu : 37%
  • 230Th : 32%
  • 238U : 39%
  • 14C : 5%
  • 99Tc : 27%
  • 137Cs : 29%
  • 90Sr/90Y : 26%
Ludlum Model 43-10-10

Ludlum Model 43-10-10

  • Alpha-Beta
  • ZnS(Ag) + Plastic Scintillator
  • 5.7 x 1.1 cm (2.24 x 0.42 in.) [D x L]
  • Adapter for Cam Filters
  • 239Pu : 37%
  • 230Th : 32%
  • 238U : 39%
  • 14C : 5%
  • 99Tc : 27%
  • 137Cs : 29%
  • 90Sr/90Y : 26%
Ludlum Model 43-78-2

Ludlum Model 43-78-2

  • Alpha-Beta
  • ZnS(Ag) + Plastic Scintillator
  • 7.6 x 0.46 cm (3 x 0.18 in.) [D x L]
  • 239Pu : 37%
  • 90Sr/90Y : 37%
Ludlum Model 44-110-4

Ludlum Model 44-110-4

  • Alpha-Beta
  • Windowless Gas Flow Proportional
  • 5.1 x 0.9 cm (2.0 x 0.4 in.) [D x L]
  • 3H : 3%
  • 14C : 21%
  • 63Ni : 36%
  • 239Pu : 42%
Ludlum Model 120

Ludlum Model 120

  • Alpha-Beta-Gamma
  • Gas Flow Proportional
  • 5.1 cm (2.0 in.) dia.
  • 14C : 10%
  • 90Sr/90Y : 42%
  • 230Th : 35%
  • Gamma : 1%
Ludlum Model 180-8

Ludlum Model 180-8

  • Alpha-Beta-Gamma
  • End Window GM
  • 5.1 cm (2 in.) dia.
  • 14C : 2%
  • 90Sr/90Y : 10%
  • 239Pu : 7%
Ludlum Model 43-78-1

Ludlum Model 43-78-1

  • Beta
  • Plastic Scintillator
  • 12.7 x 0.46 cm (5 x 0.18 in.) [D x L]
  • 90Sr/90Y : 40%
  • 14C : 12%
  • 99Tc : 35%
Ludlum Model 203

Ludlum Model 203

  • Gamma
  • NaI(Tl) Well Scintillator
  • 5.1 x 4.6 cm (2 x 1.8 in.) [D x L]
  • 1.7 x 3.9 cm (0.66 x 1.6 in.) [D x L]
  • 129I : 65%
  • 137Cs : 33%
  • 60C0 : 43%
Ludlum Model 243

Ludlum Model 243

  • Gamma
  • NaI(Tl) Integral Line Well Scintillator
  • 4.6 x 5.1 cm (1.8 x 2 in.) [D x L]
  • 1.7 x 3.9 cm (0.66 x 1.6 in.) [D x L]
  • 125I : 80%
  • 99mTc : 90%
  • 137C : 33%
  • 60Co : 43%
Ludlum Model 182

Ludlum Model 182

  • For Radon Flask Sample Counting
  • 6.1 x 12.7 cm (2.4 x 5 in.) [D x L]

Sample Holders

Ludlum Model 180-1

Ludlum Model 180-1

  • 5.1 cm (2 in.) dia.
  • Compatible with all 5.1 cm (2 in.) OD detectors, including:
  • Model 43-2
  • Model 43-2-2
  • Model 44-1
  • Model 44-2
  • Model 44-3
  • Model 44-21
  • Model 44-98
Ludlum Model 180-1L

Ludlum Model 180-1L

  • 5.1 cm (2 in.) dia.
  • Lead Shielding
  • Compatible with all 5.1 cm (2 in.) OD detectors, including:
  • Model 43-2
  • Model 43-2-2
  • Model 44-1
  • Model 44-2
  • Model 44-3
  • Model 44-21
  • Model 44-98
Ludlum Model 180-24

Ludlum Model 180-24

  • 5.1 cm (2 in.) dia.
  • Compatible with all 5.1 cm (2 in.) OD detectors, including:
  • Model 43-2
  • Model 43-2-2
  • Model 44-1
  • Model 44-2
  • Model 44-3
  • Model 44-21
  • Model 44-98
Ludlum Model 180-7

Ludlum Model 180-7

  • 5.1 cm (2 in.) dia.
  • Compatible with all 6.6 cm (2.6 in.) OD detectors, including:
  • Model 44-10
  • Model 44-17
Ludlum Model 180-16

Ludlum Model 180-16

  • 10.2 cm (4 in.) dia.
  • Compatible with Model 43-1, 43-1-1
Ludlum Model 180-4

Ludlum Model 180-4

  • 5.1 cm (2 in.) dia.
  • Compatible with Model 44-7
Ludlum Model 180-2

Ludlum Model 180-2

  • 5.1 cm (2 in.) dia.
  • Compatible with Model 44-9
Ludlum Model 180-15

Ludlum Model 180-15

  • 5.1 x 1.5 cm (2 x 0.6 in.) [D x L]
  • Compatible with Model 44-40
Ludlum Model 180-15-3

Ludlum Model 180-15-3

  • 5.1 x 1.5 cm (2 x 0.6 in.) [D x L]
  • Compatible with:
  • Model 43-92
  • Model 43-93
  • Model 44-142
Ludlum Model 180-8

Ludlum Model 180-8

  • 5.1 cm (2 in.) dia.
  • Lead Shielding
  • Includes End Window GM Detector
Ludlum Model 180-9

Ludlum Model 180-9

  • 5.1 cm (2 in.) dia.
  • Lead Shielding
  • Compatible with 5.1 cm (2 in.) and 6.6 cm (2.6 in.) OD detectors, including:
  • Model 43-2
  • Model 43-2-2
  • Model 44-1
  • Model 44-2
  • Model 44-3
  • Model 44-10
  • Model 44-11
  • Model 44-17
  • Model 44-21
  • Model 44-98
Ludlum Model 180-12

Ludlum Model 180-12

  • 5.8 x 2.97 cm (2.3 x 1.17 in.) [D x L]
  • Lead Shielding
  • Compatible with:
  • Model 44-10
  • Model 44-11
  • Model 44-17
Ludlum Model 180-28

Ludlum Model 180-28

  • 5.1 cm (2 in.) dia.
  • Compatible with Model 26-Series