The adhesive component of the flow cell is made up of four high-precision flat windows with high-performance, corrosion-resistant, and hydrophilic film layers coated on the inner and outer surfaces. The advantage of our product is that it can ensure good angles, parallelism, perpendicularity, and size requirements of the flow cell after splicing. Moreover, the components can maintain excellent optical indicators in harsh and harsh environments, and can maintain great advantages in extreme use environments such as humidity and ocean.