Fire extinguisher by filling the extinguishing agent can be divided into five categories: 1. Dry powder fire extinguishers. 2. Carbon dioxide fire extinguisher. 3. foam fire extinguisher. 4. Water-type fire extinguisher. 5. Halon fire extinguisher (commonly known as "1211" fire extinguisher and "1301" fire extinguisher) extinguisher fire extinguisher pressure by driving type can be divided into three categories: a gas storage extinguishers. Pressure extinguishing agent from storage cylinders fire extinguisher on the release of compressed gas or liquefied driven fire extinguisher. 2. gas storage extinguishers. Extinguishing agent by compressed gas fire extinguisher inside the same container or vapor pressure-driven fire extinguishers. 3 chemical reactions extinguishers. the gas pressure inside the fire extinguisher extinguishing agent from the chemical reaction driven fire extinguishers.