Monitoring device

The utility model provides a monitoring device, which belongs to the technical field of municipal engineering, aims to solve the problems that more dust is easy to fall on an objective lens of an existing electronic level gauge, monitoring personnel need to wipe the objective lens by using cleaning cloth during use, and the operation is relatively inconvenient, and comprises a base, a mounting plate, a support table, an instrument main body, a motor box and the objective lens, the mounting plate is fixedly connected to the upper end surface of the base; the supporting table is fixedly connected to the upper end face of the mounting plate. The instrument body is fixedly connected to the upper end face of the supporting table. The motor box is fixedly connected to the front part of the right end of the instrument main body; the lens is protected through the cleaning sponge, the lens is prevented from being abraded, the cleaning sponge is driven by the rotating block to rotate to wipe the lens, operation is simp