Pneumatic signals operate between:

Pneumatic signals are utilized in various control systems, especially in industrial applications, to transmit information through compressed air. The range of pneumatic signals typically falls between 20 and 100 kPa. This range provides a standard pressure level that allows for efficient operation and compatibility with many control components and systems designed to respond to pneumatic signals.

In this context, the pressures below 20 kPa are generally inadequate for reliable signal transmission, while pressures above 100 kPa may exceed the operational limits of standard pneumatic components, leading to potential system failures or inaccuracies in control. Thus, the defined range of 20 to 100 kPa ensures effective communication within pneumatic systems while maintaining system integrity and reliability.