Digital Ph Meter Descriptions: If you are looking for a super accurate and reliable meter, this is the one for you! This PH meter is a professional and very reliable handheld meter that is used for testing the PH level in a liquid solution. The pH value tells you when you need to add chlorine to your pool or when your wine or cheese is ready. Compared with other traditional PH meters, the most important features is it has automatic temperature calibration to ensure precise results. Specifications: Condition: 100% Brand New Measuring Range: PH: 0.00-14.00ph Temperature: 0.1℃~80℃ Resolution: PH: 0.01ph Temperature: 0.1℃ Accuracy: PH: ±0.01ph Temperature: ±0.5℃ Automatic Temperature Compensation: 0℃-80℃ Operating Temperature: 0℃~60℃ Power Supply: 3 * 1.5V LR44 button cell(Not Included) Product Size: Approx. 183 * 37 * 37mm / 7.2 * 1.5 * 1.5" Package Weight: Approx. 231g Package Included: 1 * PH Meter Operation Steps: 1. Remove the protective sleeve 2. Clean the electrode with distilled water and wipe clean the spare water. 3. Press the "ON/OFF" button. Switch on the meter. 4. Immerse the PH meter electrode in the solution for testing. 5. Lightly shake the meter, read the data when the numeric stabilized. 6. Press the "ON/OFF" button to shut off the instrument. Calibration: 1. Full standard buffer solution ph 6.86, in clean beakers. 2. Fill 2 beakers, one is used for cleaning the electrode and the other one is used for calibration. 3. Turn on the power. 4. Put meter into buffering solution. Press "cal" about 5 seconds when screen show until screen show the value is the same with buffer solution. 5. Calibration finished.