4in1 pH tester for complete water quality assessment: measures pH, TDS, EC, and temperature in one device to help you understand water quality and protect family and friends. Accurate readings every time: sensitivity probe and resolution deliver precise measurements quickly across various liquid types. Stable, dependable results: ATC temperature compensation provides consistent readings and minimizes errors due to liquid temperature changes. Easy to keep clean and use: clean the test probe before testing again; after calibration, immerse the sensor to obtain quick, precise pH results. Broad compatibility: designed to work with various liquids, enabling versatile use across different applications. Quick, practical workflow: calibrate as required, then use the device to measure pH and related parameters, with speed and reliability. Use scenarios: Home drinking water safety: test tap, filtered, or bottled water to verify pH, TDS, EC, and temperature for safe consumption or mixing. Aquarium maintenance: monitor water quality to maintain a stable environment for fish and plants. Hydroponics and nutrient solution monitoring: keep pH, TDS, EC, and temperature within ranges for healthy plant growth. Note on use: clean the probe before each test; after calibration, immerse the sensor and obtain quick, precise pH readings.