PH Meter 0.01 PH Battery Powder High Precision Water Quality EC Tester 0-14 PH Measurement Range for Aquarium Swimming Pool Digital Electric PH Meter LCD Tester Pocket Hydroponics Aquarium Water Test

Specifications:Measure range: 0.00 - 14.00PH Resolution: 0.01PH Accuracy: ±0.01 PH (at 25℃) Power Supply: 2*1.5V (LR44 Included) Operating Temperature: 0℃ - 80℃ (32℉ - 176℉) Dimension: 155mm* 31mm * 18mm / 6.10”×1.22”×0.70” Weight: 50g / 1.76oz Calibration: 1. Turn on the pH meter. 2. Dissolve each buffer solution in 250 ml of distilled water. 3. Immerse the electrode into the pH 6.86 solution (under the temperature of 25℃). 4. Press the “CAL”(calibration) button for 5 seconds and release； - Display screen will start flashing "6.86"； - Wait for it until the display screen stops flashing； - Rinse the electrode with distilled water and dry it with filter paper. 5. Repeat the above steps with 4.01 and 9.18 pH buffer powder. Note: Calibration is required in the following conditions. - Lengthy periods of inactivity - Widespread use - The testing accuracy requirement is very high - The "cal" key was pushed, and the electrode was exposed to air for an extended time.Package Includes: 1× pH Meter 3× pH Buffer Powder 1× User's Manual