| Milwaukee Instruments Economy combination pH-EC-TDS pH/EC/TDS Combo Meter Range: 0.00 - 14.00 pH 0 - 4000 ppm 0.00 - 6.00mS/cm Accuracy +0.20 pH and + 2% Full Scale for EC & TDS Comes with SE600 Combo Probe a 9 volt Battery a 20ml Sachet of Calibration Solution of pH 7.01 1500 ppm and 1413S/cm- SKU:... more | | $247.65 $231.00 FREE shipping go to store |