Standard smoke detectors do not detect carbon monoxide (CO). They are designed to sense particles from fire, not gas. While some “combination” alarms detect both, you must have specific CO detectors installed for protection against this odorless, colorless, and dangerous gas.
Why Can’t Smoke Detectors Detect Carbon Monoxide:
Different Hazards: Smoke detectors detect particles of combustion (fire). Carbon monoxide detectors detect toxic CO molecules produced by faulty fuel-burning appliances.
Different Technology: Smoke detectors use sensors that see physical smoke or detect particles in the air. CO detectors require electrochemical or metal oxide sensors to detect chemical compounds.
Different Placement: Smoke detectors are often placed on high walls or ceilings because smoke rises. Carbon monoxide detectors should be placed near sleeping areas, as CO mixes evenly with air.
Differences and Safety Guidelines for Smoke and Carbon Monoxide Detectors:
Smoke Alarm: Detects smoke particles from fire.
CO Detector: Uses electrochemical sensors to detect gas buildup.
Combination Unit: Senses both (often labeled on the device).
Placement: CO is similar in density to air, so detectors should be placed on every level, ideally 5 feet above the floor.
Action: If a CO alarm sounds, get fresh air, call 911 immediately.
Important Tips Regarding Smoke and Carbon Monoxide Detectors:
Combination Alarms: Some devices are designed to detect both, but a standard, low-cost smoke alarm usually does not have a CO sensor.
Check Your Unit: Look for a label indicating it detects “CO” or “Carbon Monoxide” or check the model number on the back of the device.
Safety Requirements: To ensure safety from both fire and carbon monoxide poisoning, you should have both types of alarms installed, or a combined unit.
