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About product and suppliers:
        Alibaba.com offers 2,098 pen digital ph meter products. About 89% of these are ph meters, 1% are other lab supplies, and 1% are pool & accessories. 

A wide variety of pen digital ph meter options are available to you, such as household, auto testing machine. You can also choose from free samples, paid samples. 

There are 2,101 pen digital ph meter suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Taiwan, which supply 98%, 1%, and 1% of pen digital ph meter respectively. 

Pen digital ph meter products are most popular in North America, Western Europe, and South America. 

You can ensure product safety by selecting from certified suppliers, including 232 with ISO9001, 140 with Other, and 56 with ISO14001 certification.