A pressurization controller utilizes which of the following measurements?

The pressurization controller is designed to monitor and regulate the cabin pressure within an aircraft to ensure a safe and comfortable environment for passengers and crew. To accomplish this, it relies on several critical measurements, namely cabin altitude, cabin rate of change, and barometric pressure.

Cabin altitude refers to the altitude at which the cabin is pressurized, essentially indicating how high the cabin feels as compared to actual altitude. Cabin rate of change measures how quickly the cabin altitude is rising or falling; this is important in ensuring that pressure changes occur at a rate that the human body can acclimate to, thus preventing discomfort or potential altitude sickness. Barometric pressure is also crucial, as it provides the external atmospheric pressure, allowing the controller to adjust the cabin pressure accordingly to maintain the desired cabin altitude.

The combination of these measurements gives the pressurization controller the data it needs to keep the cabin environment within safe limits and ensure a smooth experience during ascent and descent. This comprehensive monitoring helps maintain an appropriate pressure differential relative to the outside environment, which is vital for safe and effective cabin pressurization.