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About product and suppliers:
        Alibaba.com offers 1,309 portable auto refractometer products. About 48% of these are refractometers, 34% are other optics instruments, and 9% are medical optical instruments. 

A wide variety of portable auto refractometer options are available to you, such as free samples. 

There are 1,240 portable auto refractometer suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Hong Kong, which supply 99%, 1%, and 1% of portable auto refractometer respectively. 

Portable auto refractometer products are most popular in North America, Eastern Europe, and Africa. 

You can ensure product safety by selecting from certified suppliers, including 240 with ISO9001, 217 with ISO13485, and 127 with Other certification.