Breathable moisture barrier for an occupant sensing system

The ventilated dampproof circuit, and suitable for soft electrode and a foam a metal and an outer part, a without as the liquid environment said that further seriously will not harm the electric light precision degrees to the car compartment and a environment of the ability of temperature and humidity generator. The invention further claimed is with high enough multiple penetration thermal (MVTR) ventilating polymerization material, which can permit the steam and rapid achieves balance on the shaped chair cushion sensor assembly of the dampproof circuit, enables the humidity compensation of passenger sensor system of work correctly. The ventilated dampproof path of the invention claims enough high MVTR layers; the humidity sensor the pad to balance rapidly, a starting when the vehicle and an air conditioner or the warm air can slide the quick change of passenger compartment the condition a.