iPhone Geiger Counter
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If you're curious or concerned what the radiation levels are around you, then check out this cool new iPhone Geiger Counter. This small, portable, lightweight Geiger counter works with a free downloadable app for your iPhone to precisely measure beta and gamma rays from 0.04-20 microsieverts per hour. Since we cannot see, smell or taste radiation, this is a handy peace-of-mind device to have around, especially if you live near a nuclear power plant.