It is used to connect digital sensors or analog electrodes to monitor the sensor’s measurement data and working status in real time. It can also calibrate and calibrate the sensor, with data storage, data transmission, external control and other functions. Equipped with a transflective LCD screen, the operation interface is simple and friendly, and does not require high professionalism of the operator. Digital sensors that can be connected include: pH, ORP, conductivity, turbidity, dissolved oxygen, ion concentration, COD and other multi-parameter factors.