▎ 摘　　要

NOVELTY - Manufacturing tank water storage film-forming foam extinguishing agent mildew warning device comprises adding benzaldehyde with mass concentration of not more than two thousand as the probe molecule to the water film-form foam extinguishant raw liquid and fully stirring. The graphene oxide powder is dispersed in water, and added ammonium hydrogen fluoride under stirring and reacting to obtain dispersion liquid. One end of the pre-straightening titanium wire is stretched into the dispersion 1 cm and slowly stirring, and then dried, heated, reduced and solidified to form coating end. The titanium wire electrode is obtained with coating end, and then assembled the electrode in the tank water-storage film-formed foam extinguishment agent. The MCU with digital-analog and analog-digital module are connected with the non-coating end of titanium wire electrodes through the digital-digital output channel. USE - Method for manufacturing tank water storage film-forming foam extinguishing agent mildew warning device used for extinguishing oil and gas fire in various oil, gas exploitation, storage and large power transformation facility. ADVANTAGE - The method enables to prepare tank water storage film-forming foam extinguishing agent mildew warning device that has long service life and high practicability, and provides early warning of occurrence of mildew, and realizes sensing of dissolved oxygen content change at very low cost.