Deepwater hydrological detector

The utility model discloses a deepwater hydrological detecting instrument, which relates to the hydrological field and comprises a detecting instrument body, a protective sleeve is attached to the outer wall of the detecting instrument body, a display screen is arranged at the top end of the surface of the detecting instrument body, a setting button is arranged at the bottom end of the surface of the detecting instrument body, and a connecting seat is arranged at the bottom end of the detecting instrument body. A connecting wire is arranged at the bottom end of the connecting seat, a clamping block is arranged on the inner wall of the clamping groove, a mounting plate is arranged at the bottom end of the clamping block, and a filter cover is arranged at the bottom end of the mounting plate. According to the hydrological parameter detection device, the fixed plate, the fixed rod and the limiting rod are arranged, so that when hydrological parameters are detected through the ultrasonic generator, the fixed plat