5 In 1 Digital Water Quality Tester Pen EC PH Salinity Temp Meter/Detector
(Sea salt/fresh water salt). pH test range: 0.01-14.00pH. Resolution: 0.01pH Accuracy: ±0.05pH. It is a waterproof water quality test pen with five functions. Conductivity test range: 0 to10000uS/cm, 10.01-19.99ms, 20.1-400mS/CM.