Polishing tank with removable sock and integrated sensors

A polishing tank (100) comprising:

• a metal sleeve (110);
• and,
• a removable insert modular system (120);
• said removable insert modular system (120) being configured to be inserted into said metal sleeve (110) and to be removed from said metal sleeve (110), wherein said metal sleeve (110) comprises a deformable area (111) integral to the metal sleeve (110) and configured to deform outwardly so as to identify a deformation of the deformable area due to an increased pressure within the sleeve above atmospheric pressure wherein the deformable area deforms to a greater extent than other areas of the metal sleeve so as to provide a visual indication of the increased pressure,
• wherein said metal sleeve (110) comprises a cover (115) held to the body (116) of the sleeve (110) by fastening members (117), the fastening members (117) are screws, the cover (115) comprises a hexagonal perimeter, and the screws are provided at three sides of the hexagonal perimeter of the cover (115).