Pocket size and portable with switchable backlight and a large LCD display for clear readings in any setting. ATC function (automatic temperature compensation) ensures accurate pH readings across temperature changes, and automatic calibration helps maintain measurement accuracy. The IP65 fully waterproof design supports use in wet environments. Test the pH level and temperature of solution or water with a data hold function to capture and record readings for documentation. Replaceable pH sensor probe with an insert type design enables convenient and fast replacement, reducing downtime and maintenance effort. Use scenarios Aquariums and fish tanks: monitor and maintain safe pH and temperature to support aquatic health. Hydroponics and irrigation systems: keep nutrient solutions within pH range for better growth and consistency. Field water testing or onsite measurements: perform reliable pH and temperature checks in wet or outdoor conditions, with readings preserved for records. Key attributes Function: pH and temperature measurement with data hold, ATC, and automatic calibration. Compatibility: suitable for measuring pH and temperature in solution and water samples. Size: pocketsized, portable design for onthego use. Material: replaceable electrode/probe with insert type for easy maintenance. Performance: switchable backlight, large LCD display, IP65 waterproof rating for durability in challenging environments.