【7 in 1 Water Quality Meter】 The tester has the functions of monitoring Salinity, ORP, TDS, PH, SG, EC meter and temperature measurement. With this practical PH tester, you can complete your work faster and easier than ever! 【Easy to Use Digital PH Meter】 Just remove the protective cap of the pH pen and immerse the electrode of the ph water tester in the solution and press the button to measure. Don't worry about seeing the displayed value when the light is insufficient. The tester has a backlit LCD screen to help you see the measurement clearly in any situation. 【High Accuracy】 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 press the HOLD/TEMP key to lock the measured value and take it out to view, which is really simple. 【Automatic Temperature Compensation】Temperature can affect the reading levels, the digital pH meter for hydroponics has an even better range of 0°C to 60°C