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About product and suppliers:
        Alibaba.com offers 8,133 survey instrument products. About 16% of these are other optics instruments, 2% are industrial metal detectors, and 2% are testing equipment. 

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

There are 8,054 survey instrument suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and South Korea, which supply 97%, 1%, and 1% of survey instrument respectively. 

Survey instrument products are most popular in Southeast Asia, Africa, and South America. 

You can ensure product safety by selecting from certified suppliers, including 300 with ISO9001, 254 with Other, and 22 with ISO14001 certification.