Calibrated for
Different Situations: The probe is a laboratory grade spectroscopy probe, so the device is powered on with a prompt "calibrate within a week". Does not need to be calibrated as often for less stringent daily home use or outdoor travel use
Water Quality Visualization: The color of the display will be divided into 4 grades of excellent, good, medium and poor water quality, allowing you to intuitively understand the quality of the sample water, to ensure that you drink safe and secure water