See https://www.youtube.com/video/rEP0I6B9SbA
L&L used ceramic protection tubes to protect Type K thermocouples from oxidation and kiln interiors from falling metal dust.
           
              November 1, 2025
             | 
      
|---|
            VIDEOS
      
   | 
      
©2025 L&L Kiln Mfg Inc
https://hotkilns.com/support/pottery-kiln-videos-links/thermocouple-protection-tube