Carts sensors equipped with brushes carbon-bronzes, high quality, quasi non-existent wear (not of junction copper to the seals fish-plates). Body, platinum and connection box polyamide charged glass fiber. Screw with eyelet and passivated galvanized steel chain. Possibility of twinning the sensors.
Continuity: bandage copper uninterrupted, conducting uninterrupted copper, not of junction = not of wear. Perfect dilation. Always possible extension, one puts a box of connection and one extends with a new section.