Which material prevents electrode and tube contact in the Fenwal fire protection system?

Ceramic beads are used in the Fenwal fire protection system specifically to act as a dielectric barrier that prevents contact between the electrodes and the tubes. This dielectric property ensures that the electrical circuits within the fire detection system remain insulated, preventing unintentional short circuits and ensuring reliable operation. The use of ceramic beads is crucial because they can withstand high temperatures, making them suitable for environments where fire protection is critical.

While rubber insulation, glass fiber, and plastic casing each have insulating properties, they may not provide the same level of thermal stability or electrical insulation in high-temperature applications as ceramic beads do. This makes ceramic beads an essential component in maintaining the integrity and reliability of the system in potentially hazardous conditions.