MOISTURE MEASUREMENT DEVICE

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PROBLEM TO BE SOLVED : To solve the problem in which : the electrolytic anode and electrolytic cathode used in a conventional moisture measurement device by the Karl-Fisher titration method are entirely made of platinum or have structures in which only the liquid contact parts are made of platinum and the platinum is connected to a lead wire, other than platinum, and which is sealed in a glass tube; and both types are prone to be broken when undergoing a strong impact in washing or transportation, leading to inability to measure, which requires the expensive anode and cathode to be replaced. SOLUTION : In a moisture measurement device of the present invention, only the liquid contact parts of the electrolytic anode and the electrolytic cathode are made of platinum to improve mechanical properties, and stainless wires are connected to the liquid contact parts. Metal parts other than the platinum parts are shielded with fluorine resin heat-shrinkable tubes, so that mechanical strength is greatly improved with chemical resistance and conductivity maintained. In addition, a connection part between a platinum wire and the stainless wires is inserted into a stainless pipe and fixed by welding, which improves mechanical properties of the connection part and stabilizes workability. Further, the amount of the platinum as a rare metal used is limited to a minimum. This leads to the reduction in environmental burdens. COPYRIGHT : (C)2013, JPO&INPIT