These fire extinguishers are recently developed and these are used to avoiding the heating element of fire when the fire accident occurred. These are used primarily for class A fires and also used for class C fires. Water mist is used in Data centers, Marine, Industries where are liabilities are very high. Water mist discharges when the risk of fire and controls the situation in less the 10seconds. Water mist also is known as FM200 or fire gas. This system combination of fire alarm system, when the earlier of fire, smoke gets detected and fire alarm activates and the fire alarm panels send the signal and trigger the FM200 and it further extinguisher to control the fire.