Perrygraf Victoreen Instruments Co. Health Physics Slide Rule

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Country of manufacture: USA,            Date of manufacture: ____
Overall length: 17.8 cm,          Width: 5.1 cm.,           Weight: 30.5 gms.
Materials: all plastic
Cursor: 4.7 X 6.3 X 0.3 cms; All-plastic, wrap-around; lines = one on front + Isotope indicator lines, one on back
Scales: 14, specialized
Front: No. of Half-Value Layers, shielding materials [ Shield Thickness, Time, Dose ] % Activity Remaining, No. of Half-Lives
Back: Isotope indicator lines, Dose Constant [ Activity, Distance, Half Lives or Half Value Layers ] Dose rate, Flux per cm² Min
Condition: C3-C4 (Very minimal to minimal signs of use)
Came with: Victoreen instruction manual, form 1083-61

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