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Vaseline Glass Bead Geiger Counter Radioactive Test Source

Need a safe way to test out your geiger counter? Try our vaseline glass bead. Vaseline glass is a type of glass with a small amount of uranium oxide added, which makes it glow under ultraviolet light (also called depression glass). This also makes it slightly radioactive. With the GM-10, we get about 200 CPM with the bead directly in front of the detector window.

The bead is available for just $9.99, and may be ordered online or you can order by mail We're having a special right now, you can get 5 beads for just $39.99!

This item is safe to handle, and legal to own. It is under 70 Bq/g, so it is not considered radioactive.








Thinking of buying a surplus CDV-700 or 715 detector? Be sure to read our report first.