Specification Brand : Gearwell BulletPoint : AZ8689 0-14pH/0.05pH PH testing pen pH meter BulletPoint1 : brand new and high quality BulletPoint2 : A pH meter is an electronic device used for measuring the pH which is either the concentration of Hydrogen ions in an aqueous solution or the activity of the Hydrogen ions in an aqueous solution. BulletPoint3 : The pH will indicate if the solution is ic or basic, but is not a measure of ity or alkalinity. BulletPoint4 : pH meters work in liquids though special probes are sometimes used to measure the pH of semi-solid substances. BulletPoint5 : A pH meter consists of a special measuring probe (a glass electrode) connected to the body which measures and displays the pH reading. Color : Multi IncludedComponents : No ItemDisplayDimensions_Length : 5.91 inches ItemDisplayWeight : 0.07 pounds ItemName : Portable pH Meter, Digital pH Tester Kit, 0.00-14.00 pH Measuring Instrument, 0.01 pH Accuracy, High Precision Meter ItemPackageDimensions_Height : 6 centimeters ItemPackageDimensions_Length : 26 centimeters ItemPackageDimensions_Width : 22 centimeters ItemTypeKeyword : science-lab-ph-meters ItemVolume : 1 cubic_centimeters Manufacturer : Gearwell Material : plastic ModelName : Gearwellf5t70g2vxq ModelNumber : Gearwellf5t70g2vxq NumberOfBoxes : 1 NumberOfItems : 1 PartNumber : Gearwellf5t70g2vxq ProductDescription : Specifications Accuracy: Grade 0.01 PH Range: 0.00 ~ 14.00pH (±0.05pH) Repeatability: ±0.03pH mV Range: -1400mV ~ +1400mV Temperature Range: -10 ~ 60°C (0.1°C resolution) Solution Compensation: 0 ~ 60°C Power Supply: 9V Battery (not included) Display: Large LCD with backlight Working Conditions: 0 ~ 35°C, 0-80% RH (Non-Gel) Weight: 650g (22.9oz) Size: 17.2 × 6.2 × 3 cm Appearance Functions ON/OFF Button Mode Button (Switch modes) MAX/MIN HOLD Button °C/°F Selection Button CAL/Backlight Button LCD Display Electrode Plug Electrode Assembly Electrode Storage Bottle LCD Display Indicators Battery Status HOLD Function MIN/MAX Measurement PH Temperature Readings READ Function Usage Conditions Temperature: 0 ~ 35°C (Solution: 5 ~ 60°C) Humidity: 80% RH No vibration or magnetic interference Calibration (Three-Point Method at 25°C ±2°C) PH 4.00 Calibration Rinse electrode Immerse in PH 4.00 buffer Press CAL >3s until stable PH 6.86 Calibration Repeat with PH 6.86 buffer PH 9.18 Calibration Repeat with PH 9.18 buffer Measurement Modes Default Mode: PH temperature mV Mode: Press MODE 4 times to measure ORP/Ion-selective Battery Maintenance Replace battery when indicator is empty Remove battery for long-term storage Recalibrate if: Large temp. difference Electrode stored dry too long After measuring pH12 or fluoride solution Package Includes 1x Digital PH Meter (Battery not included) 1x Plastic Case 1x PH Composite Electrode