Geiger Counter Test Source (Monazite sand)
Does your Geiger counter or dosimeter reliable? The main issue with radioactivity detector is that without any radioactive source, you are never sure your equipment works. The solution is to obtain a small sample of monazite sand (25 grams) to get a contact radioactivity 20 times greater than the normal one (+200 µRem/h) .
Plastic zipped bag with 25 grams of monazite sand
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{"Date First Available": "June 23, 2013"}