You right mandrix,
I didn't contact aquacomputer technical support so have no clue what they do with people and issues of their products online.
as far as I know many technical support would share you basic knowledge about troubleshooting.
Exactly what you said
but I thnink it is good way to resolve many problems is little bit of your knowledge and some patience first
anyway, thank you for any advise to resolve this problem
I will post some photos which I took of that sensor when was disassembled
Best Regards