Biosensor, isolating layer thereof and analyte monitoring device

The invention provides a biosensor, an isolating layer thereof and an analyte monitoring device, the biosensor comprises a first electrode provided with a sensing layer and a polymer film, the polymer film at least covers the sensing layer and the first electrode, the polymer film comprises a protective layer and an isolating layer, the protective layer is closer to the first electrode than the isolating layer, and the isolating layer is closer to the first electrode than the protective layer. The isolation layer is configured to reduce the influence of sterilization gas on the sensing layer when the biosensor performs gas sterilization, the isolation layer is prepared from a first solution, the first solution comprises a first polymer and an organic solvent, and the first polymer is polyurethane. According to the present disclosure, it is possible to provide a biosensor resistant to sterilization gas, an isolation layer therefor, and an analyte monitoring device. 本公开提供一种生物传感器及其隔离层和分析物监测装置，生物传感器包括设置有传感层的第一电极、