What is the standard range of pneumatic signals?

The standard range of pneumatic signals, particularly in industrial automation and control systems, is typically defined as 3-15 psi. This specific range is used because it allows for a recognizable difference between the low end, which can indicate a zero or minimum condition, and the high end, which signifies the maximum condition of the control signal.

The range of 3-15 psi provides a comfortable operating range for actuators, which enables them to function effectively without unnecessary complexity. It also minimizes the impact of atmospheric variations and allows for multiple devices to operate in unison, facilitating a common understanding of the pneumatic signal across various systems and equipment. This standardization contributes to the reliability and compatibility of pneumatic devices in diverse applications.

Other ranges, while they do exist in specific applications, do not represent the commonly adopted standard for pneumatic control signals in most industry settings.