3X New Yy-400 Hydrogen Ion Concentration Water Quality Test Pen Ph/Orp/H2 And Tem 4 In 1 Digital Drinking Water Meter 4853252710588

3X New Yy-400 Hydrogen Ion Concentration Water Quality Test Pen Ph/Orp/H2 And Tem 4 In 1 Digital Drinking Water Meter 4853252710588

YY-400 / YY-400N is a newly developed high-precision multifunctional water quality tester, which has the function of measuring PH, ORP, hydrogen ion...

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