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I discussed your project with the folks at HID Global and came up with some good recommendations. First, try using one of the standard seal tags on the market—they suggested their HID Seal Tag edTemper, though there are others available—and replace or extend the loop by your loop. To make this work, the loop must be made from conductive material. Next, you’ll have to tackle the housing material. If the tag is not specified for 200 degrees Celsius for 30 minutes, you’ll need to remove the original housing and put the electronics inside your ceramics. This would alter the tag’s read-range characteristics. As you may have discovered, standard RFID chips cannot be read at 200 degrees. Most will survive that temperature for 30 minutes, but to read them you would need to cool them to about 85 to 130 degrees. Good luck on your project.
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