This PH meter has a wide range of applications in aquariums, swimming pools, garden ponds, bathtubs, drinking water, RO systems, spas, soap mixtures, food, wine, beer or other liquids. 5 in 1 :This PH tester has multiple functions, PH/TDS/EC/SALT/TEMP, TDS measurement range: 0-200000ppm, EC measurement range: 0-200000US/cm, PH measurement range: 0.01-14.00pH, SALT measurement range: 0.00-25.00%. Automatic Temperature Compensation:Temperature may affect the reading level, automatic temperature compensation ensures that the test temperature is within the range of 0°C to 60°C for better readings. LCD digital display:The PH tester has a backlit LCD to help you see the results clearly in any situation. The automatic shut-off function switches off the power after 5 minutes, saving power without any action. Our digital water pH tester's high precision algorithmic chip and electrodes ensure an accurate and fast response. When the measurement is stable, simply press the HOLD/TEMP key to lock the value and remove it for easy viewing.