So you want to test gold or platinum with the help of your phone? The GemOro AuRACLE AGT2 Platinum/Gold Tester has you covered. It lets you use your iPad, iPhone, or iPod Touch in addition to a testing plate and a pen probe to start performing gold tests. The mobile app keeps track of your testing history. The device is portable and fits in your pocket. It shows its results via a bar graph or an analog meter readout.
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The AGT2 is integrated with touch screen and mobile technology to test metals. Just bring your smart device, and you are set. Not cheap but quite an interesting app-enabled device.
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