【5 in 1 Water Quality Tester】The digital pH tester has the functions of monitoring TDS, pH, salt content, EC and temperature. TDS measuring range: 0-1000 ppm, EC measuring range: 0-10000 US/cm, pH measuring range: 0.01-14.00 pH, salinometer measuring range: 0.00-25.00 %, temperature conversion function. 【High Precision】 The high precision algorithm chip and electrode of our digital water pH tester ensure accurate and fast response. When the measured value is stable, just long press the HOLD/TEMP button to lock the measured value and take it out to display, which is really easy. 【Two salt content measuring devices 】The digital pH tester can detect the salt content of food. At the same time, it can detect the salt content of sea water. Food salt content measuring range: 0.00-25.00%, water salt content measuring range sea water: 10.1 to 200.0 ppt. 【Auto shut-off function and large screen display】 The pH tester has a backlit LCD screen that allows you to clearly see the measurement in all cases. The auto-off function turns off the device after 5 minutes without any operation to save energy. Uses a fully transparent liquid crystal (LCD) to display 4-digit values and corresponding physical units. 【Automatic Temperature Compensation】 Temperature can influence the measured values, digital ph meter for hydroponics water has an even better range of 0°C to 60°C (32°F to 140°F), automatic temperature compensation can ensure you get the best reading, so you can test safely confidence in any environment.