The Stainless Steel Visual Indicator housing is where the temp indicators (VI and click discs) are installed.
A small flat head screw keeps the VI housing, the Induction sleeve and the Cap together.
It's where the delicate parts are for the Tempest Cap, treat it well and it will does its job in the long run.
The Tempest will still work without the VI or the audible click discs, but it will require a much more involved heating method from the user, like using a timer.
Please, don't heat the VI housing directly and watch out for possible dust/particles/anything, who could enter inside the Visual Indicator housing and make the VI not function properly.
Heating directly (torch or IH) the VI housing will damage your temp indicators forever. It's possible, but tricky to replace them, so better to protect them for the long run.
Also, keep in mind when cleaning that the VI spring and the click discs are more subjects to flash rusting.
Dry them with a slow Tempest heat cycle, and don't let them in a high humidity air environment for long-term storage.
