Accurate pH tester – pH meter with a sensitive electrode sensor, featuring a 0–14.0 measuring range to quickly and easily read pH levels. This accurate pH tester kit offers 0.01 resolution, ensuring precise readings within ±0.01 pH. Simple calibration – The pH meter includes 3 pH calibration powder packets. Press and hold the calibration button (CAL), then place the water pH tester in the pH buffer solution for several seconds to enable automatic calibration. Automatic temperature compensation – When the sample solution temperature differs from the standard solution, the built-in automatic temperature compensation (ATC) system ensures accurate pH measurement across temperatures from 0°C to 60°C (32°F to 140°F). Wide application – Digital pH meter is ideal for home and laboratory use. The pH pen accurately measures pH and is suitable for various applications including water, swimming pools, aquariums, spas, hydroponics, wine, and beer testing. Attention – When not in use, always replace the cap. Exposure of the glass electrode to air may cause inaccurate readings and unstable values, which can affect the performance of the pH meter. Material: Plastic Color: As shown Package Contents: 1 x pH tester Note: Light reflection and differences in display screens may cause slight variations between the color of the item in the image and the actual product. Measurement may vary by +/- 1-3 cm.