This is a device used to detect gas in water. The figure is only the upper part. There is also a long tube and a detection module below. At that time, Party A's main problem was to solve the problem of damage of nano semi-permeable tube in water due to sand impact. Party A was also very satisfied with the final solution, but I was not able to send it out. As for appearance, this Party A does not require high requirements and belongs to accessories.
Can you give me a more detailed explanation?