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​Ludlum Beta Radiation Detectors
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Model 44-1
Ludlum Part Number: 47-1531
Beta Radiation Survey, Sample Counting
1.7 x 0.01 in. (Dia x L) Plastic Scintillation Radiation Detector
Used with Ludlum General Purpose Radiation Survey Meters, Ratemeters, Scalers
Efficiency (4π): 7% C-14
Window Active Area: 11.6 cm²
Window Open Area: 11.6 cm²
​Background: 100 cpm in 10 µR/hr
Data Sheet
Manual
Detector Clips
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Model 44-142
Ludlum Part Number: 47-3161
Beta Radiation Survey
0.010 in. Thick Plastic Scintillation Detector
Used with Ludlum General Purpose Radiation Survey Meters, Ratemeters, Scalers
Efficiency (4π): 4%C-14; 30%Sr-90/Y-90; 20%Tc-99
Background: 300 cpm or less in 10 µR/hr
​Window Active Area: 100 cm²
Window Open Area: 88 cm²
Data Sheet
Manual
Detector Clips
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Model 44-215
Ludlum Part Number: 47-4143
Beta Radiation Survey
2.0 x 0.01 in. (Dia x thickness) Plastic Scintillation Radiation Detector
Used with Ludlum General Purpose Radiation Survey Meters, Ratemeters, Scalers
Efficiency (4π): 10% C-14; 33% Tc-99 and Cl-36
Window Active Area: 20 cm²
Window Open Area: 16.65 cm²
Background: 100 cpm in 10 µR/hr
Data Sheet
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Model 44-110
Ludlum Part Number: 47-2585
Tritium Surface Survey, Windowless Beta Radiation Survey
Windowless Gas Flow Proportional Detector
Used with some Ludlum General Purpose Radiation Survey Meters, Ratemeters, Scalers
Efficiency (4π): 25% for H-3
Window Active Area: 126 cm²
Window Open Area: 100 cm²
Background: 400 cpm
Used with P-10 Counting Gas
Data Sheet
Product Manual