PROBLEM TO BE SOLVED: To provide a hydrogen peroxide gas sterilizer 1 capable of estimating a hydrogen peroxide concentration in a sterilization tank 2 without disposing a hydrogen peroxide sensor in the sterilization tank 2.SOLUTION: A hydrogen peroxide gas sterilizer 1 sterilizes sterilization objects by supplying hydrogen peroxide gas into a sterilization tank 2 accommodating the sterilization objects therein. The hydrogen peroxide gas sterilizer 1 includes: a water seal vacuum pump 6 that suckingly discharges gas in the sterilization tank 2 to the outside and a hydrogen peroxide sensor 19 to detect a hydrogen peroxide concentration contained in drainage from the water seal vacuum pump 6. The hydrogen peroxide sensor 19 may be replaced with a chlorine sensor 27 for detecting a residual chlorine concentration.COPYRIGHT: (C)2016,JPO&INPIT【課題】滅菌槽2に過酸化水素センサを設置することなく、滅菌槽2内の過酸化水素濃度を推定できる過酸化水素ガス滅菌器1を提供する。【解決手段】被滅菌物が収容された滅菌槽2内へ過酸化水素ガスを供給して、被滅菌物を滅菌する過酸化水素ガス滅菌器1である。滅菌槽2内の気体を外部へ吸引排出する水封式真空ポンプ6と、この水封式真空ポンプ6からの排水中に含まれる過酸化水素濃度を検出する過酸化水素センサ19とを備える。過酸化水素センサ19を残留塩素濃度検出用の塩素センサ27で代用してもよい。【選択図】図1
