| 摘要 |
PROBLEM TO BE SOLVED: To provide a sensor protection tube that prevents contamination by a drug solution or the like, has a flexibility and suppresses permeation of a drug solution for a long time. SOLUTION: This sensor protection tube 1 is formed in a two-layer structure having an inner layer and an outer layer. The outer layer 11 is made of a fluorescent resin having at least an impurity property, and the inner layer 12 is made of a fluorescent resin having at least a barrier property. With the above configuration, even when the sensor protection tube having a sensor section 2 inserted therein is dipped in a drug solution in order to sense the drug solution reserved in a drug solution tank in an environment having a high cleaning degree, contamination by the drug solution is prevented because the outer layer is made of the impurity fluorescent resin so that the cleaning degree of the environment is maintained at a state of a high level. In addition, even when the sensor protection tube is dipped in the drug solution for a long time, permeation of the drug solution is suppressed because the inner layer is made of the barrier fluorescent resin so that the inserted sensor is protected from the drug solution. COPYRIGHT: (C)2011,JPO&INPIT
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