Such thermocouples are suited for immersion in the melting materials. They are therefore protected by a cast iron, silicon carbide or Sialon protecting tube. The choice of the material depends on the requested performances.
Thermocouples may be mineral sheathed with magnesium oxide insulation for a stronger protection against corrosion. They may also be protected under ceramic insulating beads.
Additional applicable standards are taken into consideration upon customer request.
All protecting tubes may be supplied as spare parts.