@article{oai:kitami-it.repo.nii.ac.jp:00006555, author = {北川, 啓}, issue = {1}, journal = {北見工業大学研究報告}, month = {Nov}, note = {application/pdf, The author reported previously on the effects of humidity on the electrical resistance of sodium copper-chlorophyllin-Tetrapanax papyrofer paper (TUSO shi) hygrometer. This system was not suitable for measuring relative humidity lower than 40%. It was considered that P_2O_5, which is deliquescent, would he more available to prepare the elements for the measurement of lower relative humidity. Therefore, several pieces of TUSO shi were immersed into the P_2O_5 aqueous solution, which had several different concentrations, and then dried at room temperature in air. These papers were fixed between Ni-mesh electrodes with plastic spring nippers, and thus elements of phosphoric acid-TUSO shi hygrometer were prepared to study the relationships between relative humidity and A.C. current when A.C. voltage was supplied across Ni-mesh electrodes. (H-I curve) At 2 hours after voltage application, A.C. currents were almost saturated at the given relative humidity and temperature. After 20 days aging, H-I curves of these elements were more reproducible, and by phosphoric acid-TUSO shi hygrometers made of aqueous solution with 4-16% of P_2O_5, the measurement of relative humidity ranging from 17% to 90% was done more exactly. It is expected that using this new system the measurement of relative humidity ranging from O% to 100% would be possible.}, pages = {79--85}, title = {通草紙に含まれたリン酸の電気的特性と湿度との関係*}, volume = {15}, year = {1983} }