5 in 1 Water Quality Tester This digital pH tester measures TDS, pH, salt content, EC, and temperature. TDS measurement range: 0–1000 ppm. EC measurement range: 0–10000 µS/cm. pH measurement range: 0.01–14.00 pH. Salinity measurement range: 0.00–25.00%. Includes temperature conversion function. High Accuracy Equipped with a high-precision algorithm chip and electrode for accurate and fast readings. Long press the HOLD/TEMP button to lock the value when stable for easy viewing. Dual Salt Content Measurement Capable of measuring salt content in food (0.00–25.00%) and seawater (10.1–200.0 ppt). Auto-Off Function and Large Screen Display Features a backlit LCD screen for clear visibility in any lighting condition. Automatically powers off after 5 minutes of inactivity to conserve battery life. Displays 4-digit readings with corresponding units using clear liquid crystal display technology. Automatic Temperature Compensation Compensates for temperature variations during testing. Operates within a temperature range of 0°C to 60°C (32°F to 140°F), ensuring reliable and consistent results in various environments.