PH Meter Digital TDS Meter Water Quality Tester EC and Temperature Test Meter 4 in 1 Set for Aquarium Indoor Pool

Digital PH Meter Water Tester It's not only ideal for household or laboratory use. Also suitable for testing pH balance of drinking water, pool, aquarium, food Project, RO system, Spa, or hydroponics. pH Meter 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?.22?.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 it until the display screen stops flashing? - Rinse the electrode with distilled water and make it dry with filter paper. 5. Repeat the above steps with 4.01 pH buffer powder and 9.18 pH buffer powder. Note: Calibration is required in the following conditions. - Lengthy periods of inactivity - Very frequent use - The testing accuracy requirement is very high - The cal key was pushed and electrode exposed to air for extended period of time TDS Meter Specifications: Measurement Range: 0 - 9 990ppm (?999ppm Display?0) Accuracy: 2% F.S Power Supply: 2*1.5V (LR44 Included) Operating Temperature: 0? - 80? (32? - 210?) Dimension: 162mm*29mm*15mm / 6.38"?.14"?.59" Weight: 45g / 1.58oz NOTE Warning Tips Be careful with the glass probe since it may be a little fragile when you use. Remember to gently wipe it with a clean, soft cloth when you're done before capping it again