When measuring samples containing salts, this kit extends the lifetime of combustion tubes and catalyst, reducing maintenance frequency. It enables seawater measurements of approximately 2,500 times by injecting 40 microliters (value not guaranteed). Requires ceramic fiber 638-60074-00. Recommend to use SO3 mist scrubber (220-95365-00) and B-Type Scrubber (638-52572-03) for protecting NDIR detector.