What must the pressure gauge of a halon extinguisher indicate?

The pressure gauge of a halon extinguisher being in the serviceable band is crucial for ensuring the extinguisher is ready for use in an emergency. This band indicates that the extinguisher has sufficient pressure to function effectively when needed. Halon extinguishers, like all fire extinguishers, are designed to operate within a specific pressure range, which ensures that the extinguishing agent can be expelled forcefully enough to combat a fire.

When the gauge shows that the pressure is within the serviceable band, it also reflects that the extinguisher has been properly maintained and inspected, meeting safety standards. If the gauge indicates a pressure below this range, it may signal that the extinguisher is compromised and may not work effectively. Conversely, a reading at maximum capacity can also be problematic. Thus, it is important for users to regularly check the gauge and ensure it indicates that the extinguisher is within that safe and effective pressure range.