Which of the following is not a component checked during PBE preflight?

The weight of the device is not a component checked during the Preflight Briefing Equipment (PBE) inspection. The PBE inspection primarily focuses on ensuring the equipment is in a suitable condition for emergency use. This includes checking the humidity dot color to confirm the moisture content is acceptable and that the device has not been compromised by exposure to moisture. The presence of spare cartridges is also vital since they are essential for the PBE to function correctly, providing a fresh air supply to the user. Finally, ensuring the sealing condition is intact is crucial for the safety and effectiveness of the equipment during an emergency situation.

In contrast, while the weight of the PBE may be a feature noted for operational limits or storage considerations, it is not a typical factor evaluated during the preflight checks to ensure the device's readiness and reliability in the event of an emergency.