How to Identify CO₂ Fire Extinguishers and Dry Powder Fire Extinguishers

CO₂ Fire Extinguisher (Carbon Dioxide)

✅ Identification Features:

• Color: Usually black or dark red, often labeled with white or yellow text.

• Nozzle: Equipped with a horn-shaped nozzle, typically metal or hard plastic. No pressure gauge.

• Size: Common sizes include 3kg, 5kg, and 24kg.

• Fire agent: Contains compressed carbon dioxide gas (CO₂). When discharged, it emits a cold white fog at around -78°C.

🔥 Suitable For:

• Fires caused by electrical equipment, server rooms, and electronics.

• Leaves no residue – safe for electrical use.

⚠️ Usage Warnings:

• Not suitable for enclosed spaces – risk of asphyxiation.

• Always hold by the insulated handle to avoid cold burns.

Dry Powder Fire Extinguisher (MFZ Type)

✅ Identification Features:

• Color: Typically bright red, easy to spot.

• Nozzle: Comes with a rubber hose, and usually has a pressure gauge on the body.

• Size: Common sizes include 1kg, 2kg, 4kg, and 8kg.

• Fire agent: Contains dry chemical powder (usually NaHCO₃ or KHCO₃), expelled by compressed gas.

🔥 Suitable For:

• Fires caused by flammable liquids (gasoline, oil), gas, or solid materials like paper, wood, and plastic.

• Can also be used for electrical fires, but may leave residue.

⚠️ Usage Warnings:

• Do not spray on people or food – powder can be irritating.

• Check the pressure gauge regularly. If the needle is outside the green zone, maintenance is needed.

✅ Quick Comparison

Identifying CO₂ and dry powder fire extinguishers helps ensure proper selection and safe usage in fire emergencies. Regularly inspect your extinguishers to make sure they’re always ready for action when needed.