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About product and suppliers:
        Alibaba.com offers 3,699 portable refractometer products. About 78% of these are refractometers, 14% are other optics instruments, and 5% are ophthalmic optical equipments. 

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

There are 3,754 portable refractometer suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Taiwan, and Hong Kong, which supply 98%, 1%, and 1% of portable refractometer respectively. 

Portable refractometer products are most popular in Western Europe, Southern Europe, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 572 with ISO9001, 290 with ISO13485, and 136 with Other certification.