Beta

Beta Detectors

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/h

Data Sheet Product Manual Detector Clips

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
Background: 300 cpm or less in 10 µR/hr

Efficiency (4π): 4% C-14; 30% Sr-90/Y-90; 20% Tc-99
Window Active Area: 100 cm²
Window Open Area: 88 cm²

Data Sheet Product Manual Detector Clips

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; 33% Cl-36
Window Active Area: 20 cm²
Window Open Area: 16.65 cm²
Background: 100 cpm in 10 µR/hr

Data Sheet

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

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