A medical instrument processor includes an enclosure, a liquid distribution system, and a disinfectant concentration measuring subsystem. The enclosure is configured to hold a medical instrument. The liquid distribution system is configured to deliver a disinfection solution to a medical instrument within the enclosure. The liquid distribution system has a liquid outlet. The disinfectant concentration measuring subsystem includes a first mixing chamber in fluid communication with the liquid outlet, a pump that is configured to simultaneously pump the disinfection solution and the reagent solution into the first mixing chamber, and a concentration analysis assembly that is operable to determine a concentration of disinfectant in a sample solution that is output from the first mixing chamber. The reservoir is in fluid communication with the first mixing chamber.一種醫療儀器處理器，其包括一罩殼、一液體分配系統、及一消毒劑濃度測量子系統。該罩殼經組態以固持一醫療儀器。該液體分配系統經組態以遞送一消毒溶液至在該罩殼內之一醫療儀器。該液體分配系統具有一液體出口。該消毒劑濃度測量子系統包括：一第一混合室，其與該液體出口流體連通；一泵，其經組態以同時泵送該消毒溶液及該試劑溶液至該第一混合室中；及一濃度分析總成，其可操作以判定自該第一混合室輸出之一樣本溶液中之一消毒劑濃度。貯器與該第一混合室流體連通。
