A solution state measurement device is disclosed. The solution state measurement device comprises: a probe having a measurement unit with at least one open surface so as to measure the state of a solution; a mesh arranged on a path through which the solution flows into the measurement unit; and a support portion which is arranged on the outside of the probe, and which has an open portion surrounding the at least one open surface of the measurement unit, wherein the open portion defines the path through which the solution flows into the measurement unit, and the mesh can be mounted on the open portion of the support portion.

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