How can the charge of a fire extinguisher be verified?

The verification of a fire extinguisher's charge is primarily done by reading the gauge, which indicates the pressure within the extinguisher. A properly charged extinguisher will typically show a reading in the green zone of the gauge. This green zone indicates that the pressure is adequate for effective operation. If the needle is in the red zone, it may signify that the extinguisher is either overcharged or undercharged, which can compromise its effectiveness in an emergency situation.

Relying on the gauge provides an immediate visual indication of the extinguisher's readiness to function as intended. Regular checks of this gauge should be part of routine maintenance to ensure safety compliance in any environment where fire hazards exist.