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About product and suppliers:
        Alibaba.com offers 16,451 hardness meter products. About 6% of these are flow meters, 5% are hardness testers, and 2% are ph meters. 

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

There are 16,418 hardness meter suppliers, mainly located in Asia. The top supplying countries or regions are China, Hong Kong S.A.R., and India, which supply 98%, 1%, and 1% of hardness meter respectively. 

Hardness meter products are most popular in North America, Domestic Market, and Mid East. 

You can ensure product safety by selecting from certified suppliers, including 5,931 with ISO9001, 1,816 with Other, and 1,729 with ISO14001 certification.