Air Bag Sensor Working. Seat occupancy sensor. An air bag system in a vehicle works through the use of sensors monitored by an Airbag Control Unit ACU.
Many car models include sensors that automatically reset after an impact. The safing sensor is responsible for preventing the airbags being deployed unintentionally. It comprises a reed contact in a resin-filled tube and a ring-shaped magnet.
Two types of airbag sensors used in cars are electrical and mechanical.
The safing sensor is integrated into the airbag control unit. In the air bag sensor the operation takes place as explained in the following points-. Inflation system contains sodium azide and potassium nitrate. Electric current heats the filament which ignites the capsule containing Nitrogen gas.
