YINMIK pH Meter, Digital 4 in 1 PH EC TDS Temp Meter for Water HydroponicsYINMIK pH Meter, Digital 4 in 1 PH EC TDS Temp Meter for Water Hydroponics {Multiparameter pH EC TDS Temp Meters:} Growers good aid. YK 4 Pen Meter can measure pH, EC (Electrical conductivity), TDS (total dissolved solids), dont need others, just press {MODE CAL} key to switch readings of pH, EC (S cm mS cm), TDS (ppm). {Easy to Calibrate pH Meter:} Automatic pH calibration. Supports 3 point pH CAL at 7. 00, 4. 00, 10. 01. Comes with 2 sets of pH
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YINMIK pH Meter, Digital 4 in 1 PH EC TDS Temp Meter for Water Hydroponics