A pneumatic identification apparatus for the body weight of a seat occupant includes a control unit and at least one sensing apparatus each including a pneumatic sensing apparatus and an auxiliary sensing apparatus; the pneumatic sensing apparatus includes at least one soft elastic hollow structure body and a sensing unit; the soft elastic hollow structure body communicates with a first air pressure sensor, the first air pressure sensor being configured to measure a first air pressure value P.sub.a in the soft elastic hollow structure body; the control unit is configured to compare the first air pressure value P.sub.a with standard set values and correspondingly output a body weight type; and the auxiliary sensing apparatus includes a top pressure-bearing plate and a bottom carrying plate respectively mounted on two end faces of the soft elastic hollow structure body. Further provided is a pneumatic identification seat provided with the pneumatic identification apparatus.

Provided is a vehicle seat for use with an occupant classification system (OCS). The seat comprises: a seat base including a seat base support, and a cushion pan mounted on the seat base support and forwardly moveable on the support to extend the seat base. The seat further comprises an intermediate layer fixed with respect to the seat base support and adapted for fastening to a component of the OCS so that when the seat base is extended by the cushion pan moving forward with respect to the seat base support, the intermediate layer does not move forward with the cushion pan but remains substantially stationary. The relationship between the various OCS components can therefore be maintained irrespective of the extension of the seat base.

Provided is a vehicle seat for use with an occupant classification system (OCS). The seat comprises: a seat base including a seat base support, and a cushion pan mounted on the seat base support and forwardly moveable on the support to extend the seat base. The seat further comprises an intermediate layer fixed with respect to the seat base support and adapted for fastening to a component of the OCS so that when the seat base is extended by the cushion pan moving forward with respect to the seat base support, the intermediate layer does not move forward with the cushion pan but remains substantially stationary. The relationship between the various OCS components can therefore be maintained irrespective of the extension of the seat base.