Specifications Measuring range: 0-14 pH Resolution: 0.01pH Accuracy: 0.05pH Batteries: 4x 1.5V LR44 button cell (AG13) Automatic temperature compensation: 0-50¡ãC (32-122¡ãF) Dimensions: 5.94x1.30x0.79in Weight: 1.87oz Package includes 1 x Annic pH Meter (Red) 4 x 1.5V LR44 button cells 1 x Adjustment screwdriver 2 x Calibration packets 1 x Carrying case 1 x User's manual How to operate 1. Remove the protective cap. 2. First clean the electrode with distilled water, and suck it with filter paper. 3. Turn on pH by ON-OFF switch located on the top of battery case. 4. Immerse the pH meter electrodes in solution up to the immersion level. 5. Stir gently and wait for the reading to stabilize. 6. After use, switch off it, use the distilled water clean the electrode and replace the protective cap.
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