Accurate pH tester pH meter with a sensitive electrode sensor, featuring a 014.0 measuring range to quickly and easily read accurate pH levels. This 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 The built-in automatic temperature compensation (ATC) system adjusts for temperature differences between sample and standard solutions, ensuring accurate pH measurements within the range of 0C to 60C (32F to 140F). Wide application Digital pH meter is ideal for home and laboratory use. The portable pH pen is suitable for testing water, swimming pools, aquariums, spas, hydroponics, wine, and beer. Care instructions When not in use, always replace the protective cap. Exposure of the glass electrode to air may cause unstable readings and measurement errors, affecting performance. Material: Plastic Color: As shown Package contents: 1 x pH tester Note: Light reflection and display settings may cause slight color variations between the image and actual item. Measurement may vary by +/- 1-3 cm.