Multi-function PH/ORP/EC/TEMP/SALT/S.G/TDS LCD Water Quality Tester Pen IP76
Multi-function PH/ORP/EC/TEMP/SALT/S. G/TDS LCD Water Quality Tester Pen IP76. ORP negative potential ±1999MV. 2, TDS value 0-200000ppm. EC value 0-200000㎲/cm. 1x 7 In 1 Tester Pen with / without battery and powder.