Features: The acidity value detectors detection pen supports a acidity ranges of 0-14 and accuracy of up to ± 0.01. Suitable for multiple occasion such as laboratory and home water quality monitoring, it solve the precise measurement needs of users for the acidity and alkalinity of different liquids. The small size is like a regular pen, making it easy to carry around. Suitable for water quality testing during outdoor activity and travel, helping users quickly understand water quality conditions in various environment and ensure health and safety. Equipped with automatic calibration function, no complex setting required, calibration can be completed with clicking. Suitable for users without professional knowledge, easy to get started, meeting the needs of daily household use and educational teaching occasion, making acidity measurement simple and easy to implement. Using high-quality ABS shell to ensure long-term use without easy damage. Suitable for laboratories or industrial sites that require frequent use, reducing replacement frequency and lowering usage costs. Automatic calibration function simplifies operation for beginner while meeting professional standards in industrial environment. Specifications: Material: ABS Size:Approx.152mm/5.98''x31mm/1.22'' Package Includes: 1Piece acidity Meter note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.