What is the function of a pressure gauge on a fire extinguisher?

The function of a pressure gauge on a fire extinguisher is primarily to indicate whether the extinguisher is charged and ready for use. The pressure gauge provides a visual representation of the pressure within the extinguisher's tank. When the gauge shows a green zone, it signifies that the extinguisher is properly charged and operational. If the needle is in the red zone, it indicates a pressure deficiency, suggesting that the extinguisher may not function effectively when needed.

This feature is vital for ensuring safety, as fire extinguishers need to be in working condition to be effective during an emergency. Regular checks of the pressure gauge can help users quickly determine if the extinguisher is ready for immediate use or if it requires maintenance or recharging. Understanding this critical function reinforces the importance of regular inspections and maintenance of fire safety equipment to ensure readiness in case of a fire event.