FM200, whose scientific name is HFC 227ea, is a registered trademark of Great Lakes Chemical Company. FM200 fire extinguishing system is a kind of gas fire extinguishing system, which uses sevoflurane as fire extinguishing agent and sprays a certain amount of agent to the protection area within a specified time by the nozzle to make the agent concentration reach the design value. The fire extinguishing mechanism is physical cooling, reducing oxygen concentration and chemical inhibition.