Cod online monitoring instrument

The utility model discloses a cod on-line monitoring instrument which comprises a monitoring instrument body, one side of the monitoring instrument body is provided with a hollow storage box, and the front end of the storage box is provided with an opening; a door plate is movably connected and mounted on one side of an opening in the front end of the storage box through a side-hung shaft, and a sample reserving plate is embedded in the storage box; a plurality of sample reserving grooves are uniformly formed in the sample reserving plate in an array manner; a display is attached to the front end of the monitor body; a water quality monitoring tank with an upward opening is arranged at the lower end of the display; a monitoring hole connected with an internal monitoring mechanism is formed in the middle of the water quality monitoring tank; a sealing cover is arranged at the upper end of the water quality monitoring tank; and a handle is arranged at the upper end of the monitor body. The test tube is more con