Dry Powder Fire Extinguisher with External Gas Cartridge

There are also different sizes of Fire Extinguishers. Bigger fire extinguishers can be used for a longer time. Hand-held fire extinguishers vary between 0.5 and 14 kg. A 2 kg extinguisher works for about two to four seconds, the 12 kg model for about eighteen seconds. There are also bigger fire extinguishers, mounted on a cart or a vehicle. These are used to fight fires at airports, for example.

To be useful, fire extinguishers need to be checked at regular intervals. Usually, there are laws about this duration, concerning fire extinguishers in public buildings.