What is the purpose of a supply pressure gauge?

The purpose of a supply pressure gauge is to indicate the pressure in the air tanks of a vehicle, which is crucial for the operation of the braking system and other air-operated components. Understanding this pressure allows the driver to ensure that there is sufficient air supply for safe operation.

In commercial vehicles, a properly functioning air system is vital, as inadequate pressure can lead to brake failure or diminished performance. With the gauge indicating the pressure levels, the driver can quickly assess whether the air tanks are properly charged before starting a journey, ensuring that the brakes are responsive when needed.

It's important to note that while monitoring fuel levels, tire pressure, and load weight are also essential aspects of vehicle operation, these functions are not related to the supply pressure gauge and are indicated by different gauges or measurement systems in the vehicle.