HM Digital Pro Series Dual Probe pH/TDS/EC/Temp meterThe COM 360 is a professional grade level pH EC TDS Temp meter ideal for all water quality testing, hydroponics, water purification applications, wastewater regulation, aquaculture, colloidal silver, labs & scientific testing, pools & spas, ecology testing, boilers & cooling towers, water treatment and more. Features Measures Potential Hydrogen (pH), Electrical Conductivity (EC), Total Dissolved Solids (TDS), and Temperature Five scales: pH, S, mS,
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HM Digital Pro Series Dual Probe pH/TDS/EC/Temp meter