What is the key difference between a carbon monoxide alarm and a detector?

What is the key difference between a carbon monoxide alarm and a detector?

• A. Alarm alerts occupants directly; detector sends signal to alarm control unit.
• B. Detectors alert occupants; alarms send signal to a control unit.
• C. They are the same device.
• D. Alarms detect CO while detectors measure it.

Answer: (A)

The important idea here is that a detector is the sensing element, while the alarm is the device that warns people. A carbon monoxide detector monitors the air for CO and, when it detects elevated levels, passes that information to an alarm control unit or directly to the alarm system. The alarm then sounds the siren or makes the alert audible to occupants. Some standalone units combine both sensing and alerting, but the typical arrangement described in the question separates the sensing (detector) from the warning signal (alarm). That’s why the best answer states that the alarm alerts occupants directly, while the detector sends a signal to the alarm control unit.

The important idea here is that a detector is the sensing element, while the alarm is the device that warns people. A carbon monoxide detector monitors the air for CO and, when it detects elevated levels, passes that information to an alarm control unit or directly to the alarm system. The alarm then sounds the siren or makes the alert audible to occupants. Some standalone units combine both sensing and alerting, but the typical arrangement described in the question separates the sensing (detector) from the warning signal (alarm). That’s why the best answer states that the alarm alerts occupants directly, while the detector sends a signal to the alarm control unit.