Hydroponic Meter PRO Kit, All-in-One pH Pen, Interchangeable ProbeA digital hydroponic testing meter for measuring waters acidity, alkalinity, electrical conductivity (EC), total dissolved solids (TDS), temperature, and salinity (salt content) to help optimize its quality for gardening and water treatment applications. The highly responsive sensor probe utilizes a lithium glass membrane to instantly determine pH readings with highly precise 0. 01 accuracy. This all in one pH pen tester for water features an IP 67
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Hydroponic Meter PRO Kit, All-in-One pH Pen, Interchangeable Probe