... law to measure the pH value 2, High precision school equipment in digital lab 1,Range: 0~14 2,Resolution: 0.013 ... law tomeasure the pH value. It has been widely used in chemical, biological, environmentaland many other fields to measure the pH ... 30 seconds). After using, repeat the cleaning procedure, and set the sealed cap on the electrode. educational equipment /WCY PH Sensor (equipment in lab)