4 In 1 Portable Tem H2 Orp Ph Meter Dissolved Hydrogen Test Water Quality Purity

2, ORP negative potential ±1999MV. H2 hydrogen rich 0-10000PPb. PH value 0-14. Lightweight and portable. 1 water quality test pen. Built-in high-sensitivity electrode head, high-sensitivity glass electrode, rust-proof platinum electrode.

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