Most smoke and carbon monoxide detectors look the same, so you might think that they basically are the same. As long as they’ve been certified by a testing organization, such as UL or Intertek Electrical Testing Labs (ETL), they should work just fine, right? Not exactly. Show “We need to test detectors because some fail at CO detection, and there are differences in how quickly different models respond to CO,” says Bernie Deitrick, Consumer Reports’ test engineer for smoke and CO detectors. “I have never tested a model that failed our fire and smoke tests, and it is reassuring to know that such critical devices actually work.” A detector’s ability to sense carbon monoxide can mean the difference between life and death. According to the CDC, every year more than 400 Americans die from accidental CO poisoning, and about 50,000 Americans end up in the emergency department. In the lab, we expose detectors to both flaming fires and smoldering, smoky fires to see how well they detect smoke and fire. For CO alarms, we expose them to precise high CO levels (400 parts per million) and low CO levels (100 ppm) to see how accurately and how quickly they detect the deadly carbon monoxide. And for stand-alone CO detectors, we also check the accuracy of the CO levels that they either display on their screens or read aloud via voice messages. As you shop, note each detector’s power source: Generally, detectors are battery-powered, hardwired, or plugged into an outlet. Battery-powered detectors can be placed anywhere and typically run on replaceable batteries (usually 9-volt or AA) or sealed lithium batteries that last 10 years. Hardwired detectors require special wiring for power that’s typically found only in newer or renovated homes. Plug-in detectors receive a constant flow of power from an outlet. Both hardwired and plug-in detectors use a backup battery that will take over in the event of a power outage. Backup batteries need to be replaced annually. To determine the type you need, remove the detectors in your home from their mounts. If there are wires connected to them that run into the wall or ceiling, you need hardwired detectors. If there are no wires, you need battery-powered detectors. Below are the best smoke and carbon monoxide detectors from our tests, arranged in alphabetical order. You’ll find stand-alone smoke detectors, stand-alone CO detectors, combination smoke-CO detectors, and smart smoke-CO detectors that can send alerts to your smartphone. There are hardwired and battery-powered picks for each type of detector. For a look at all the models we’ve tested, see our smoke and carbon monoxide detector ratings. And for help picking the right types of detectors for your home, check out our smoke and carbon monoxide detector buying guide. Price when purchased online Nest Labs S3000BWES Protect Battery-Powered Smoke & Carbon Monoxide, Alarm, White, 2nd Generation  Options Sponsored From $119.00 Nest Labs S3000BWES Protect Battery-Powered Smoke & Carbon Monoxide, Alarm, White, 2nd Generation 4.9 out of 5 Stars. 3412 reviews Save with PickupDelivery3+ day shipping Kidde Fire Sentry Micro Profile 3 Year Smoke Alarm, 9 Volt Battery Popular pick Sponsored current price $5.90 Kidde Fire Sentry Micro Profile 3 Year Smoke Alarm, 9 Volt Battery 4.5 out of 5 Stars. 314 reviews Save with PickupDelivery1-day shipping Kidde 5" Battery Ionization Smoke Alarm with Test Button Sponsored current price $8.56 Kidde 5" Battery Ionization Smoke Alarm with Test Button 4.6 out of 5 Stars. 148 reviews Save with PickupDelivery1-day shipping Kidde Smoke Alarms 1276 Sponsored current price $14.34 Kidde Smoke Alarms 1276 4.6 out of 5 Stars. 320 reviews Save with 1-day shipping First Alert BRK SCO2B Smoke and Carbon Monoxide (CO) Detector with 9V Battery Rollback current price Now $19.97 was $23.47 First Alert BRK SCO2B Smoke and Carbon Monoxide (CO) Detector with 9V Battery 3 out of 5 Stars. 11 reviews Save with 1-day shipping First Alert GCO1CN Combination Explosive Gas and Carbon Monoxide Alarm with Backlit Digital Display current price $62.15 First Alert GCO1CN Combination Explosive Gas and Carbon Monoxide Alarm with Backlit Digital Display 4.2 out of 5 Stars. 56 reviews 3+ day shipping Worry-Free Combination Smoke & Carbon Monoxide Alarm with Lithium Battery P3010CU current price $44.99 Worry-Free Combination Smoke & Carbon Monoxide Alarm with Lithium Battery P3010CU 5 out of 5 Stars. 4 reviews 3+ day shipping Kidde Micro 4", 10-Year Sealed Battery Ionization Smoke Alarm, Model i1040, KIDDE Rollback current price Now $13.84 was $15.70 Kidde Micro 4", 10-Year Sealed Battery Ionization Smoke Alarm, Model i1040, KIDDE 4 out of 5 Stars. 101 reviews Save with 3+ day shipping Kidde Fire Sentry Micro Profile 3 Year Smoke Alarm, 9 Volt Battery Popular pick current price $5.90 Kidde Fire Sentry Micro Profile 3 Year Smoke Alarm, 9 Volt Battery 4.5 out of 5 Stars. 314 reviews Save with PickupDelivery1-day shipping Kidde Battery Operated Carbon Monoxide Alarm with Digital Display KN-COPP-B-LPM Best seller current price $26.99 Kidde Battery Operated Carbon Monoxide Alarm with Digital Display KN-COPP-B-LPM 4.7 out of 5 Stars. 165 reviews Save with 2-day shipping Do smoke and carbon monoxide detectors detect natural gas?While smoke detectors and carbon monoxide detectors are a critical part of protecting your home and family, they will not detect a natural gas leak; you'll need a natural gas detector for that. However, carbon monoxide detectors can alert you when your appliances improperly burn natural gas.
Do you need carbon monoxide detector for natural gas?Some people are under the impression a CO detector will also detect natural gas, but that's simply not the case. Merts recommends gas detectors in all homes but especially in homes with multiple gas appliances. This includes fireplaces, stoves & ovens, clothes dryers, and water heaters. It's just common sense.
Is there a smoke detector for natural gas?Natural gas detectors can alert you and your family of odorless and dangerous leaks. Natural gas detectors may not be as common on the list of must haves for the home such as a smoke detector or fire extinguisher, but these devices are worth serious consideration and can detect potentially serious situations.
Does Kidde carbon monoxide alarm detect natural gas?The continuous digital display shows you the level of carbon monoxide (if any) the unit is sensing as well as if gas is present. The gas sensor is a metal oxide sensor designed to detect natural gas (methane) or propane.
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Smoke carbon monoxide and natural gas detector
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