BRL British Steel Castings Research Association Exposure Calculator for Gamma Radiation Mk II

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Country of manufacture: England,            Date of manufacture: ____
Overall length: 15.9 cm,          Width: 4.6 cm,           Weight: 56.1 gms
Materials: all plastic
Cursor: 3.5 X 5.0 X 0.4 cms; all plastic; lines = one on front
Scales: 15, specialized
Front: Exposure Time [ Steel Thickness (Cobalt, Iridium), Source to Film Distance ] [ Source Strength, Film Factor ] Radon Decay, Film Density, Iridium Decay
Back: [ Steel Thickness (Radon, Thulium, Caesium), Source to Film Distance ] [ Material Density ] Material Thickness
Gauge Marks: [       ]
Condition: C5 (Signs of normal use)
Came with: Original leather pocket sheath (stitching has come loose around most of the edges)

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