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About product and suppliers:
        Alibaba.com offers 1,105 gem detector products. About 77% of these are industrial metal detectors, 1% are testing equipment, and 1% are other security & protection products. 

A wide variety of gem detector options are available to you, such as free samples, paid samples. 

There are 1,040 gem detector suppliers, mainly located in Asia. The top supplying countries are China (Mainland), United States, and Thailand, which supply 96%, 1%, and 1% of gem detector respectively. 

Gem detector products are most popular in Western Europe, Africa, and North America. 

You can ensure product safety by selecting from certified suppliers, including 207 with ISO9001, 122 with Other, and 25 with OHSAS18001 certification.