In which position is the pressure gauge needle of a fire extinguisher considered normal?

[JocelynLee]

The pressure of a fire extinguisher is considered normal when the pressure gauge needle is in the green zone. The pressure gauge of a fire extinguisher can be divided into the following three sections: 1. Red zone: If the needle of the fire extinguisher points to the red zone, it indicates that the pressure of the dry powder inside the fire extinguisher is too low to be discharged, meaning the extinguisher has become ineffective. In this case, you should take it to a certified fire equipment store to refill the dry powder, and it should not be used. 2. Green zone: If the needle of the fire extinguisher points to this zone, it indicates that the pressure is normal and the extinguisher can be used normally. 3. Yellow zone: If the needle points to this zone, it indicates that the pressure of the dry powder is too high. Although the dry powder can be discharged, there is a risk of rupture or explosion.