10 Best Home Carbon Monoxide Detectors
for April 2023

The 2 Pack Wireless Electric Smoke and Co Alarm Detector from First Alert is one of the best detectors we tested, thanks to a combination of its advanced sensors, long battery life, and ease of use. The alarm's photoelectric smoke sensor is highly sensitive, and alerts immediately when smoke (and potentially carbon monoxide) is detected. The detector's CO sensor is also highly sensitive, and automatically tests itself every 2 minutes, so you'll always know if it's working properly. The alarm is also equipped with a test/silence button, and it also has a loud 85dB alarm, so it can be heard even outside. The alarm's battery lasts 10 years, which is much longer than most detectors, and it also has 3 levels of sensitivity, so it's suitable for any home. The alarm's LCD screen shows you how long the battery will last, and when it's time to be replaced. The alarm is also portable, so it can be taken outside, and it comes with a 2-year warranty.

This 4-pack of combination smoke and carbon monoxide detectors from Aico is our favorite pick for households and families on a budget. Each detector has a clear, 4-inch diameter LED screen, which tells you what the detector is picking up. The detectors provide audible alarms for smoke, and for carbon monoxide, and are both NSF-certified and UL-listed. Both the smoke and carbon monoxide detectors have photoelectric sensors, which minimize false alarms from steam, cooking fumes, and more. The detectors have 30-minute backup batteries, which give you 24/7 protection, and the photoelectric sensors are durable enough to withstand impacts from pets. The detectors are fairly loud, and the alarms are loud enough to be heard in bedrooms and other quiet areas. The detectors run on four AA batteries, and the batteries are replaceable. The detectors are portable, and come with a wall-mounting bracket, so you can place them wherever you like. The detectors come with a 90-day money-back guarantee and a one-year warranty.

The 3-pack of 10-year battery-operated smoke detectors from iHome is a good option for homeowners who want smoke detectors that are easy to replace, have a long life, and work even if there's a power failure. The combination smoke/carbon monoxide detector provides 10 years of continuous power with a built-in lithium battery, and it's solidly constructed with a rubberized shell. The alarm has a loud, 120-decibel siren, and it can be set to sound at regular intervals or randomly. It has test and silence buttons, a low-battery signal, and end-of-life warning, so you'll know when the unit needs replacing. It's also easy to replace the battery using the included switch. The carbon monoxide detector is sensitive, and it's less likely to trigger false alarms than our other smoke detector picks. However, like most combination units, the iHome smoke detector has a combo button, which mutes both the smoke detector and carbon monoxide detector. The iHome smoke detectors are relatively expensive for battery-powered units, but they last for a long time, and they offer peace of mind.

The CO Detector from COmplete safe to use, safe to install. The CO Detector has an advanced sensor, the 4 to 6-mile detection distance, the 5-second response time, and the 85-decibel alarm. The CO Detector can detect carbon monoxide gas (CO) at any level of concentration, from 0.2ppm to 50ppm.The CO Detector has 4 levels of sensitivity to meet different requirements.The CO Detector with high sensitivity can sense the CO gas concentration within 60 to 90 minutes. The CO Detector with middle sensitivity can sense the CO gas concentration within 10 to 40 minutes. The CO Detector with normal sensitivity can sense the CO gas concentration within 5 seconds.

The Hembisen Carbon Monoxide Alarm 3 Pack is a good choice for homes with gas appliances, and it's especially handy if you have young children or pets. The detectors are easy to install, and the digital display is easy to read, even at night. The alarm has three different settings- 50ppm and 100ppm are for low-level gas, and 200ppm is for high-level gas- and is loud enough to be heard clearly in a standard-size room. The alarms are loud enough for pets to become aware of danger, and they are also loud enough for a small child to awaken. The detectors also emit a flashing green LED light that can be used as a night light to help children sleep, and the LED light can be set to turn on at specific times. The detectors emit an alarm even in the presence of moisture, smoke, and other gasses, making them especially useful for homes where natural gas or propane is used to heat water.

The Kidde Interconnected Combination Smoke & Carbon Monoxide Alarm is our first pick for budget-conscious consumers. This smoke detector has many of the same features as more expensive units, such as voice alerts, ionization technology, and a smoke alarm with 85dB sound. But its low price makes it an attractive option. The Interconnected Combination Smoke & Carbon Monoxide Alarm has 2 AA batteries, and its alarm volume is loud relative to its size. The detector's voice alarm is loud enough for an alert to be clearly heard in a sleeping baby's room. The Interconnected Combination Smoke & Carbon Monoxide Alarm also has a bright LED display, which makes it easy to identify which button to press when the detector is activated. This detector's primary flaw is its lack of a mute button, which can make it difficult to silence an alarm if an alert is heard during a sleep interruption. Battery life is also short, at only 6 months.

The Koabbit carbon monoxide detector and natural gas detector alarm has a dual sensor that detects both carbon monoxide and combustible gas. The display shows levels in both carbon monoxide and combustible gas, and the unit updates every 9 seconds to indicate any sudden changes. The unit has a good range, and it's sensitive enough to detect even low levels of carbon monoxide. The audible and visual alarms are loud and clear, and the unit is easy to install. The Koabbit also has a battery backup, so it should continue to operate even if the power goes out.

The SCO5CN is a combination smoke and carbon dioxide detector that does a decent job of detecting both. According to its manufacturer, it has a 95% detection rate, which is higher than average, but its rate of false alarms is average. Though its photoelectric sensor is sensitive, its sensitivity level is not adjustable, which means that it will trigger more frequently in rooms with thick draperies. Its lithium battery is good for up to 10 years, and First Alert offers 3-year warranties on all of its products. The alarm is low maintenance, and it's easy to install. And its 85-decibel siren is loud enough to wake you up if there's trouble. With its white finish, the SCO5CN blends in with most home decors. The SCO5CN is a good choice for a home with a variety of smoke, heat, and carbon monoxide risks.

The CO400 is a battery-powered carbon monoxide detector that doesn't require an outlet. The alarm has a 40-foot range and is loud enough to be heard throughout the house. The CO400 has 4 sensitivity levels, including a sleep mode. The alarm's red LED lamp flashes when CO levels are low, and glows when CO levels are high. The CO400 has voice alerts, which are very discreet, and a loud 85-decibel alarm that can be heard throughout the house. The CO400 also has a test button, which helps to ensure its proper functioning. The CO400 has two buttons on its face, one for power and one for silence. While the CO400's battery lasts about 6 months, it comes with a 10-year warranty.

The Kidde Nighthawk Carbon Monoxide Detector and Propane, Natural, & Explosive Gas Detector is a reasonably versatile detector. It's worth mentioning that this detector doesn't detect natural gas, so it's best used alongside a separate detector for natural gas. The detector also doesn't detect propane or natural gas, although it's fairly well-equipped for detecting carbon monoxide. The alarm is loud enough to wake you from a sound sleep, and the display is bright enough to see in low-light conditions. The detector also has three different mounting options, and it's powered by either AC or battery power. The AC-powered version has battery backup, although the battery backup feature seems to cause the detector to fail about once a month, so it's probably a good idea to keep the battery charged at all times. If you don't mind replacing batteries every month, or you don't mind taking risks, the Kidde Nighthawk Carbon Monoxide Detector and Propane, Natural, & Explosive Gas Detector is a reasonably versatile detector.