I love this article. Tested together with another tec keychain with a radiation meter. With 3 vials of tritium inside, this gave ZERO additional radiation. A piece of stainless steel jewelry with a single tritium vial more than doubled, almost tripled the amount of radiation. I'm far from an expert on the subject and I'm not even sure what radiation I measured, but just in case I will never use stainless steel keychains and plan on buying a second one instead.
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