PASS device

PASS device (Personal Alert Safety System) is a safety device used by firefighters and other emergency personnel to signal that they are in distress. The device emits a loud, high-pitched alarm when the wearer is motionless for a certain period of time, or when manually activated.

History

The PASS device was first introduced in the 1980s as a means to improve firefighter safety. The initial devices were standalone units, but modern versions are often integrated into the self-contained breathing apparatus (SCBA) worn by firefighters.

Function

The primary function of a PASS device is to emit a loud, high-pitched alarm when the wearer is motionless for a certain period of time, typically 30 seconds. This feature is designed to alert others if the wearer becomes incapacitated or trapped. The device can also be manually activated by the wearer in case of distress.

Design

Modern PASS devices are typically integrated into the SCBA worn by firefighters. The device includes a motion sensor, which triggers the alarm if the wearer is motionless for a certain period of time. The alarm is typically 95 decibels or louder, and is designed to be heard over the noise of a fire.

Use

PASS devices are used by firefighters and other emergency personnel in situations where there is a risk of becoming incapacitated or trapped. This includes situations such as entering burning buildings, working in confined spaces, or working in hazardous environments.

See also

• Firefighter
• Self-contained breathing apparatus
• Firefighting equipment