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Neutron Meters

Ludlum Neutron Meters Comparison Table

Model 30-7 Series
Lightweight Digital Neutron Survey Meter
  • Digital Meter
  • 3He Proportional Detector
  • Moderator: 19.5 cm (7.7 in.) dia.
  • Sensitivity (241AmBe): 4.5 cpm per µSv/h (45 cpm per mrem/hr) or 10 cpm per µSv/h (100 cpm per mrem/hr)
  • Range: 0 to 99.9 mSv/h (0 to 9.99 rem/hr)

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Model 3007 Series
Neutron Dose Survey Meter With Optional Internal Gamma Detector
  • Digital Meter
  • 3He Proportional Detector
  • Moderator: 19.5 cm (7.7 in.) dia.
  • Sensitivity (241AmBe): 4.5 cpm per µSv/h (45 cpm per mrem/hr) or 10 cpm per µSv/h (100 cpm per mrem/hr)
  • Range: 0 to 100 mSv/h (0 to 10,000 rem/hr)
  • Internal Detector Option for Exposure/Dose Measurements

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Model 12-4-7
Neutron Dose Survey Meter
  • 4-Range Analog Meter
  • Moderator: 19.5 cm (7.7 in.) dia.
  • Sensitivity (241AmBe): 10 cpm per µSv/h (100 cpm per mrem/hr)
  • Range: 0 to 100 mSv/h (0 to 10,000 mrem/hr)

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Model 30-4
Digital Neutron Survey Meter
  • Digital Meter
  • 3He Proportional Detector
  • Moderator: 22.9 cm (9.0 in.) dia.
  • Sensitivity (241AmBe): 10 cpm per µSv/h (100 cpm per mrem/hr)
  • Range: 0 to 99.9 mSv/h (0 to 9.99 rem/hr)

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Model 12-4
Neutron Dose Survey Meter
  • 4-Range Analog Meter
  • Model 42-31H 3He Proportional Detector
  • Moderator: 22.9 cm (9.0 in.) dia.
  • Sensitivity (241AmBe): 10,000 cpm per mSv/h (100 cpm per mrem/hr)
  • Range: 0 to 100 mSv/h (0 to 10,000 mrem/hr)

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Model 2241-4
Neutron Dose Survey Meter
  • Digital Scaler-Ratemeter
  • Model 42-31H 3He Proportional Detector
  • Moderator: 22.9 cm (9.0 in.) dia.
  • Sensitivity (241AmBe): 30 cpm per mrem/hr
  • Range: 0 to 100 mSv/h (0 to 10,000 mrem/hr)

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Model 375-31H
Area Monitor with Neutron Detector
  • Digital Area Monitor
  • 3He Proportional Detector
  • Moderator: 22.9 cm (9.0 in.) dia.
  • Sensitivity: 10,000 cpm per mSv/h (100 cpm per mrem/jr)
  • Range: 0 to 100 mSv/h (0 to 10 rem/hr)

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Model 2363 with 42-41L
Neutron Dose Survey Meter
  • Neutron and Gamma Detection
  • Analog + Digital Scaler-Ratemeter
  • External Model 42-41L PRESCILA Detector
    • Neutron Sensitivity: 350 cpm per mrem/hr
    • Range: 0.1 mrem/hr to 1 rem/hr
  • Internal GM Detector
    • Gamma Sensitivity: 1000 cpm per mR/hr
    • Range: 1 µSv/h to 10 m Sv/h (0.1 mR/hr to 1 R/hr)

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Model 15
Neutron Dose Survey Meter
  • Neutron and Alpha-Beta-Gamma Detection
  • 4-Range Analog Meter
  • Model 42-14H 3He Proportional Detector
    • Sensitivity (241AmBe): 55 cpm per mrem/hr
  • Model 44-7 End-Window GM Detector
    • Sensitivity (137Cs): 2100 cpm per mR/hr
  • Range: 0 to 500,000 cpm

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