... 2, High precision school equipment in digital lab 1,Range: 0~14 2,Resolution: 0.013, Application: The PH sensor is a measurement ... solution. Connect the electrode with the sensor, remove the sealing cap filled with protective fluid, wash the electrode with distilled water, but don ... ’t touch the sphere glass-film, and absorb the droplet with absorbent paper, pls don’t rub the glass electrode back ...