featured for use with a hybrid air bag inflator containing inert stored gas under high pressure is a liquid fueled construction which combines the functions of an initiator , gas generator , and differential low pressure switch into a single device . instead of being filled with a mixture of combustible gases , the device is filled with a combination of gases and liquids . alternatively , it makes use of a hybrid squib in conjunction with different combinations of gases and liquids . a pyrotechnic material is used to ignite the mixture regardless of the combination of fuel and oxidant used in the device . a ceramic body is used to house the device . upon combustion of the mixture , the ceramic body ruptures violently , permitting efficient transfer of the explosive energy to the inert stored gas in the hybrid inflator .