The new generation of salinity sensor (KNF-102H) is introduced by KNF-102H, which adopts the international leading four-electrode technology, RS485 digital interface, support MODBUS protocol and environment-friendly design. The new generation salinity sensor not only has higher accuracy, wider measuring range and strong stability. It also has the unique advantages of large quantity: first, it completely solves the problem of polarization in the high conductivity test; The second is to solve the problem of inaccurate reading caused by electrode pollution, sensor online monitoring without reagents, mainly applicable to: seawater, freshwater aquaculture, sewage pipes, circulating water, rivers, lakes!