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Dr care PH Tester Get accurate pH measurement easily The pH-1 meter is a perfect device for you to test the acidity or alkalinity of liquids. With resolution of 0.01pH and a 0.05pH range of error, you may get higher accuracy than other pH meters. Ideal for many household or laboratory applications With a standard measuring range of 0-14 pH, the pH meter 2011 is great for a wide range of tasks. An affordable way to test your swimming pool, aquarium, tap water, or appliance water source, you can finally know whether the water you are drinking or using is acceptable for the application. It is also an excellent choice for basic measurements in a laboratory setting, making it an ideal choice for students taking chemistry or biology classes. customers have used the pH-2011 meter in a huge variety of applications including: home brewing, soil testing, laboratory testing, aquarium maintenance, liquid solution testing, potable water testing and much more! Specifications: Measuring range: 0-14 pH Resolution: 0.01 pH Accuracy: 0.05 pH Batteries: 4x 1.5V LR44 button cell (AG13) Automatic temperature compensation: 0-50°C (32-122°F) Dimensions: 5.94x1.30x0.79in /151x33x20mm Weight: 1.87oz /53g Package Includes: 1 x pH Meter 2011 4 x 1.5V LR44 button cells 1 x Adjustment screwdriver 1 x Carrying case 1 x User's manual Note: Please make sure liquid level is below 1.5 in when testing. Please do not put the electrode directly against any hard surface.Operation Steps: 1. Remove the protective cover. 2. Clean the electrode with water (there is white crystalline salt around the electrode cap. It is a normal phenomenon of the pH electrode. As long as the electrode is immersed in water, it dissolves and disappears). 3. Turn on the switch. Insert the pH meter into the measured liquid until the liquid is submerged to a slight immersion, allowing the solution to soak slightly above the immersion line. 4. Gently stir until the displayed value is stable, then read the displayed value. The pH meter must be re-calibrated in the following cases: 1. Has been used (or placed) for a long time after calibration. 2. Particularly frequent electrode use. . High measurement accuracy. Operating Temperature: 0 - 50°C (32 - 122°F).