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GCA-07W Professional Digital Geiger Counter - Radiation Monitor - with External Wand - NRC Certification Ready- 0.001 mR/hr Resolution - 1000 mR/hr Range: Science Lab Geiger Counters: Amazon.com: Industrial & Scientific
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Geiger Counter Kit - Radiation Sensor : ID 483 : $99.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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