High-precision sea in-situ turbidity monitor

The invention discloses a high-precision sea in-situ turbidity monitor, which adopts a housing made of sea water corrosion-resistant materials, adopts a modulation-demodulation weak current signal amplification system, and adopts low-power system circuit design; the monitor can operate for more than 3 months with one battery, has two operating modes of data real time transmission and underwater self-storage, has a maximum operating water depth of 3000 m, can realize boat-carrying vertical profile investigation and horizontal dragging determination of turbidity of various water bodies such as sea, deep lakes, and the like, and can be integrated with third-party platforms for long-term in-situ monitoring, such as a multiparameter system, sea buoys/subsurface buoys, a seabed observational network, and the like.