Microchip scanners for the type of ID tags implanted in pets can be found at the AVID Scanner website. In addition, the American Animal Hospital Association website hosts a universal look-up tool for pet microchips.
AVID offers universal electronic scanners for locating chips made by several different manufacturers. The American Animal Hospital Association offers a universal search engine that finds listings across several different registries.
Electronic scanners are used by animal rescues, shelters, and veterinarians to detect the presence of implanted microchips on the bodies of pets. They can also read the chip, but it is sometimes difficult to make sense of the information contained on it, because there is no universal pet registry listing all animals that have microchips. Information is scattered across several registries, with some using different technology than the rest.