It is a weight container that is suitable for use in building a database for output calibration of a sensing element for loading weighing and can change the weight to any desired pitch without the hassle of weight, equipment, and dangerous work. An injection port 61c formed in the upper portion 61b of the container main body 61 and an injection port 61c formed in the lower portion of the container main body 61. The container main body 61 has a hollow box-And has a discharge port 61f formed therein and a scale 61e formed on a lateral side 61d of the container main body 61 and indicating a value according to the amount of liquid collected in the container main body 61, At least a portion of the lateral side 61d on which the scale 61e is formed is formed by a transparent or semi-transparent member which allows the amount of liquid in the container body 61 to be seen.
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