▎ 摘　　要

NOVELTY - The utility model relates to the technical field of titrator, especially relates to a measuring titrator for laboratory, comprising a reagent bottle, the side wall of the reagent bottle is connected with a conveying pipe, and the lower part of the reagent bottle is provided with a liquid fixing cup; the bottom end of the conveying pipe is connected with a reagent storage chamber, the lower part of the reagent storage chamber is provided with a valve; the valve is connected with the conveying pipe; the inner wall of the liquid fixing cup is sleeved with a stainless steel inner layer; the side wall of the stainless steel inner layer is linearly arranged with a scale line at equal distance; one side of the scale line is provided with a first graphene column. In the utility model, the liquid in the fixed liquid cup is gradually increased; under the action of water pressure, the rubber sliding block moves downwards to compress the first spring; the first spring is stressed and compressed; the air in the fixed liquid cup is discharged; when the user titrating is finished, the third graphene column is contacted with the first graphene column; the circuit is connected, It is convenient for the user to prepare the volume of the solution in the fixed liquid cup and reduce the error.