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Amazon.com : Nokta PulseDive Underwater Metal Detector, Waterproof Pinpointer 2-in-1 Set for Adults with 5.5 Inch Search Coil, 3 kHz Pulse Induction Frequency, Scuba Pulsedive and Pointer : Patio, Lawn & Garden
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Pulse induction Metal detector Tracker PI-2 completely with solder board. | eBay
Pulse Induction Metal Detector | Hackaday.io
Pulse induction metal detector Clone PI-AVR ready module universal metal detecto | eBay