Home > categories > Measurement & Analysis Instruments > Pressure Gauges > The pressure gauge is red, yellow and green to indicate the pressure. When the needle points to the green area, what does it mean?
Question:

The pressure gauge is red, yellow and green to indicate the pressure. When the needle points to the green area, what does it mean?

The pressure gauge is red, yellow and green to indicate the pressure. When the needle points to the green area, what does it mean?

Answer:

It means normal pressure, yellow means high pressure, red means low pressure and can't be used.
The pressure of the lift extinguisher is designed according to the maximum pressure of the storage tank. Work pressure is defined as the internal balance pressure of a fire extinguisher rated and filled 20 hours after being placed in the environment for 18 hours. The situation you describe is qualified. Domestic fire extinguishers generally pressure gauges are divided into three grades, both three colors. The pointer undervoltage condition in the red zone, in the middle of the green zone generally reach fire extinguishers work pressure, and in the yellow zone that is overpressure, each fire extinguisher has its own working pressure, pressure is too low will affect the use of.
The pointer in the green area or yellow area represents the extinguisher pressure enough to be used properly. In the red area, it's time to change.

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