4 in 1 pH Meter The water quality tester can simultaneously measure the pH, TDS (ppm), EC (conductivity) and temperature with high accuracy. You can use it to test water hardness, pH of liquids or conductivity of liquids.High accuracy: the 4-in-1 pH water tester has a highly sensitive glass electrode combined with a fully intelligent chip. The measuring range is between 0.00 and 14.00 pH and the measurement accuracy is 0.01 pH, so you get fast, accurate and stable measurement results.AUTOMATIC CALIBRATION You no longer have to worry about calibration, because the digital pH meter has an automatic calibration function, the 3-point calibration method, and the meter comes with 3 bags of calibration powder (standards: pH 4.00, pH 6.86, pH 9.18).AUTOMATIC TEMPERATURE COMPENSATION: The temperature can affect the pH of a solution. The electronic pH meter supports automatic temperature compensation, which can correct the pH within the temperature range of 0C -60C (32F-140F), so you get accurate and stable readings in all conditions.Easy to see backlight LCD: The hydroponics pH meter is equipped with a digital LCD display and a large backlit display, so you can clearly see the data even in dark environments.