| 摘要 |
PROBLEM TO BE SOLVED: To measure the contamination state of fluid in a short time, and to grasp change in the amount of adhesion of a surface due to continuous usage by measuring the change in the electric resistance of a metal electrode being dipped into the fluid in the pipe of a heat exchanger. SOLUTION: In the measurement of the contamination state of fluid in a heat exchanger, a metal electrode 2 is provided in an internal part 1 of a pipe where the fluid flows. The metal electrode 2 is mounted in a direction crossing the internal part 1 of the pipe or the like, and the signal of the electric resistance is taken into an analyzing device 3. To accurately grasp the amount of adhesion of contamination to the surface of the electrode 2 due to the contamination in the fluid, a plurality of the electrodes 2 are preferably installed. According to the contamination of the fluid in the heat exchanger, the amount of adhesion to the surface of the electrode 2 is changed, and at the same time, an electric resistance value is changed, thus grasping the contamination state of the fluid according to the signal of the electric resistance being taken in from the analyzing device 3. Information for judging whether the contamination of the fluid can block the internal part of the pipe or not can be also obtained.
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