Measuring cylinder for measuring specific gravity of viscous latex

The utility model belongs to the technical field of measuring the specific gravity of neoprene latex, and provides a measuring cylinder for measuring the specific gravity of viscous latex in order to solve the problem of accuracy of specific gravity measurement in the prior art and accurately measure the specific gravity. A feeding pipe is arranged at the bottom of the barrel; the bottom end of the feeding pipe is inserted into the lower center inside the polymerization kettle; a ball valve is arranged at the top section of the feeding pipe; a filter screen is arranged in the barrel close to the feeding pipe; a gland is arranged at the top of the cylinder body, and a thermometer and a hydrometer are arranged on the gland and extend into the cylinder body; the side wall of the cylinder body is outwards connected with a purging pipe; the middle section of the purging pipe is connected with a nitrogen input pipe; the bottom section of the nitrogen input pipe is provided with a valve I; the top of the nitrogen in