I have a Radex One geiger counter/dosimeter which I put on a new pack of 10 0.040 x 7" electrodes. It showed 0.28 µS/h, with a background value of 0.10 µS/h. 1/16 electrodes and various brands from a local supplier of welding consumables. Dividing the reading by the volume of the electrodes gives me very different numbers for 2% thorium (no, I didn't mix up the data - I measured too badly) at 0.08 µS/hr per cm3 (3/32 inch) and 0.35 µS/hr per cm3 (1/16 inch). bad, but definitely radioactive.
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