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A.W. SPERRY EMF-200A Electromagnetic Field Radiation Tester - $20 (Henderson)
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I used this to find BAD wiring (coiled) behind my bed and redo it, so I can SLEEP at night!
The EMF-200A electromagnetic field radiation tester is a reliable and efficient device for measuring radiation levels and detect potentially harmful electromagnetic fields in high tension power lines, medical equipment, electrical wiring, alarms clocks, electric ovens, cellular phones, etc. The EMF-200A is a must-have tool for anyone involved in radiation detection..