Portable 4 In 1 Hydrogen-Rich Test Pen PH/ORP/TEMP Water Quality Meter Tester UK
It is a water-proof water quality test pen with four functions. ORP test range: ±1200mV. PH test range: 0.01-14.00pH. Resolution: 0.01pH Accuracy: ±0.05pH. 1x 4 In 1 Hydrogen-Rich Test Pen PH /ORP/TEMP Water Quality Tester.