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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 (it is also called depression glass). This also makes it slightly radioactive. With the GM-10, we get about 100-200 CPM with the bead directly in front of the detector window.
The bead is available for just $9.99. 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.
We also have a larger bead, which gives slightly higher readings, especially on a GM-45 detector.
The large bead is available for just $19.99. We're having a special right now, you can get 5 large beads for just $79.99!