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▼Water is consumed by the plants and animals we depend on, and we directly consume it every day. The pH level of water can provide information on potential contamination. ▼This pH meter is 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. Great for kids school science experiments. Test different bottled waters or even your homemade sauerkraut ➤ Specifications ● Measure range: 0.00-14.00 pH ●Resolution: 0.01 pH ●Accuracy: 0.01 pH ●Power supply: 2*1.5V ●Operating temperature: 0-80℃ ●Calibration: two points automatic calibration ●Dimensions: 6.1 x 1.2 x 0.7in ● Net Weight: 48g/1.7oz ➤Package Includes ● 1 x PH Meter ● 3 x Calibration Packets ● 1 x Carrying case ● 1 x User's manual ➤ Warm tips ● Please read the manual carefully before using the pH meter!!! In addition, we post a video on YouTube about how to calibrate the ph meter. Video Link: https://youtu.be/lkm1B5cgEMc ● Clean the electrode with distilled water every time before and after use.