Rigid Rulers (RR-057)

The Rigid Ruler is a plastic tube 0.197" (5mm) in diameter containing 15 alternating 0.394" (10mm) sections of Co-57 and inactive lead. The overall length of the ruler is 0.67" (17cm) with an active length of 0.591" (15cm). Contained activity is supplied as a nominal vale +/-15%.

Model Number


Activity (μCi)

Activity (MBq)


Co-57 160 5.92


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