Purpose: IPA (isopropanol) vapour seasoning device with an IPA density monitor sensors is provided to the change shape that an IPA density is suitably dealt with by the variation for detecting IPA density in real time. Construction: a chip (135) build a shell (130) whose upper part in filled with deionized water. The top of shell is covered by a cover (120), has a scheduled inner space. IPA (145) and nitrogen (155) are provided and are ejected into chip by cover. One IPA/ nitrogen supply (NS)s part (200) provides IPA and nitrogen, is connected to cover. The density of the cover IPA of one density sensor (185) monitoring supply in real time, is positioned at IPA/ nitrogen supply (NS)s part.
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