PH Meter 4 in 1 Digital Tester: This device offers a 4-in-1 function that simultaneously measures pH, TDS, EC, and temperature with high precision and fast response. Omnidirectional measurement ensures accurate water quality assessment. Designed with reliable quality, IP67 waterproof rating, and durable ABS material, this ergonomic pocket-sized tester delivers consistent performance for various applications. 0.01 pH Measurement Accuracy: Equipped with a high-sensitivity glass probe, the pH meter provides a full measurement range of 0–14 pH with 0.01 pH resolution. It supports 3-point calibration using pH 4.00, pH 6.86, and pH 9.18 buffer solutions to ensure measurement accuracy. Easy to Calibrate: Simply immerse the electrode in the calibration solution, wait for the reading to stabilize (typically 5–10 seconds), then press and hold the MODEL/CAL button for 5 seconds to initiate automatic calibration. The large backlit LCD displays both temperature and measurement values clearly. The device automatically powers off after 5 minutes of inactivity to conserve battery life. Automatic Temperature Compensation (ATC): The built-in ATC function ensures accurate pH readings across a temperature range of 0°C to 60°C (32°F to 140°F), compensating for temperature variations in the sample to eliminate measurement errors. Extensive Application: This compact pH tester is suitable for a wide range of uses, including drinking water, swimming pools, aquariums, spas, hydroponics, food, wine, beer, and educational environments. Its portable design makes it ideal for routine water quality testing at home or in the field.