The dew - point sensor shall be of improved compensation type for contamination build - up on the mirror surface by using two reflective mirrors in physical and thermal proximity to each other as " wet " and " dry " mirrors 露点传感器应为改进补偿型，当污染积聚在镜面上时，利用两个在物理性质和热性质上彼此相近的镜子作为“湿”镜和“干”镜。
