HM Digital Pro Series Pen style TDS/EC/Temp meterCOM 100: Waterproof Professional Series EC TDS Meter The COM 100 is a professional grade level 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 electrical conductivity (EC), total dissolved solids (TDS), and temperature.
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