HM DIGITAL Portable HM 200 pH/EC/TDS/Temp Monitor Hydrometer
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The HM-200 is a versatile portable pH/EC/TDS/Temp combo monitor with a replaceable sensor ideal for all water quality testing, hydroponics, water purification applications, wastewater regulation, colloidal silver, labs & scientific testing, ecology testing, boilers & cooling towers, water treatment and more.It has a built-in sensor for Automatic Temperature Compensation (ATC) ensures readings always be accurate at various temperatures.