Carbon Monoxide is a toxic and deadly gas produced by incomplete combustion of fossil fuels, such as those used to heat a home or run vehicles. It is an odorless, colorless gas that cannot be detected by the human senses and can build up in enclosed spaces to dangerous levels. carbon monoxide detector are designed to warn occupants of the danger of CO poisoning before it becomes life-threatening.
A carbon monoxide detector is a battery-powered device that detects the presence of this lethal gas by measuring the ratio of CO to oxygen in the air. It sounds an alarm when the concentration of CO rises above a preset level, usually 80 parts per million (ppm). If carbon monoxide is at an unsafe level and no action is taken to evacuate the affected area, the symptoms can progress from headache, dizziness and flu-like fatigue to unconsciousness and death within minutes.
These devices are most commonly used in homes and commercial buildings, such as office towers. They are usually located near bedrooms and living areas, such as kitchens, dining rooms, and bathrooms. They can also be installed in garages, basements, and attics. Some devices are portable and can be taken with occupants when they move to a new location.
Most modern CO detectors use an electrochemical sensor that consists of a silica chip connected to circuits. When carbon monoxide enters the detector and reaches the silica chip, it reacts with it in a similar manner as water does to salt when it contacts it. This creates a current that lowers the electrical resistance of the sensor, which triggers an alarm. Most sensors use a battery to power the circuits. They are usually tested and replaced every six months, or when they chirp to indicate low batteries.
Several factors can cause carbon monoxide detectors to sound falsely. These include incorrect installation, the proximity of the detector to a source of fumes or steam, and even dust and dirt accumulating on the sensor. If these conditions are not addressed, frequent nuisance alarms may result in the user disabling the device.
Regular maintenance of a CO detector includes testing and replacing the batteries. It is also a good idea to place the detector in an easily accessible location, such as in a hallway near a bedroom or living area, where its alarm can be heard. The detector should be a minimum of 15 to 20 feet away from any fuel-burning appliance, such as a furnace, hot water heater, or stove. In addition to testing the carbon monoxide detector, it is a good idea to have your fuel-burning appliances checked annually by a qualified technician to prevent leaks and other problems. You should also educate your family about what to do if the carbon monoxide detector sounds and have an evacuation plan in place.