Replaceable pH sensor probe: An inserttype electrode design allows convenient and fast replacement when needed. Measures pH level and temperature: Tests the pH of solution or water with a data hold function to capture and record readings. Pocket size and portable: Compact, pocketsized device with switchable backlight and a large LCD display for easy reading in different conditions. ATC and calibration and waterproof design: Automatic temperature compensation (ATC), automatic calibration, and IP65 waterproof construction. Use scenarios Hydroponics and irrigation: Monitor and manage the pH and temperature of nutrient solutions to support healthy plant growth and consistent nutrient uptake. Field water testing and environmental samples: Take the device outdoors to quickly test water quality in streams, wells, or other locations, with reliable readings even in wet conditions. Pool, spa, and beverage preparation: Check pH and temperature of water for safe and consistent mixing, with data hold to log successive readings. Performance and features at a glance Replaceable pH sensor probe with inserttype design for easy maintenance. Simultaneous pH and temperature measurement with data hold to facilitate recording. Compact, portable form factor with backlight switch and clear LCD display. ATC, automatic calibration, and IP65 waterproof protection for reliable operation in demanding environments.