Online water quality detector: TDS value detection for tap water online, with built-in three-way interface. LCD display screen, clear numerical values for easy reading. Sensor interface: detachable sensor interface, easy to carry. Detachable High Sensitivity Probe: A high-precision and sensitive sensing probe that detects water quality and automatically compensates for temperature, reducing errors. The overall design is compact and precise, and the back is easy to install and use with adhesive sticker.