10 Best Smoke And Carbon Monoxide Detector We've Tested: Top Rated

Source: Amazon

Best Overall: First Alert Wireless Interconnected Photoelectric Smoke

Best Budget: Google Nest Protect - Smoke Alarm - Smoke Detector

Best Value: Kidde Smoke & Carbon Monoxide Detector

Best Design: Kidde Smoke & Carbon Monoxide Detector

Best Durable: X-Sense 10-Year Battery Combination Smoke Carbon Monoxide Alarm Detector

1. First Alert Wireless Interconnected Photoelectric Smoke

Brand	FIRST ALERT
Style	SCO500B-3
Power Source	Battery Powered
Color	White
Item Dimensions LxWxH	10.75 x 7.13 x 9 inches
Alarm	Audible
Sensor Type	Electrochemical, Photoelectric

The First Alert Smoke Detector is the perfect solution for providing your home with both smoke and carbon monoxide protection. This Wireless Interconnected Photoelectric Smoke and Carbon Monoxide Combo Alarm with Voice and Location allows you to monitor both smoke and carbon monoxide levels in your home from one convenient device. This alarm also features an advanced voice warning system that announces the location of the alarm, so you know exactly where to go in case of an emergency. Its easy installation and battery-operated design make it a great choice for any home. Protect your family today with the First Alert Smoke Detector!

2. Google Nest Protect - Smoke Alarm - Smoke Detector

Brand	Google
Style	Battery
Power Source	Battery Powered
Color	White
Item Dimensions LxWxH	5.3 x 1.5 x 5.3 inches
Item Weight	1 Pounds
Alarm	Audible
Sensor Type	Photoelectric

The Google Nest Protect Smoke and Carbon Monoxide Detector is a powerful and reliable device that will keep your home safe and secure. This battery-operated detector is designed to detect both smoke and carbon monoxide, and will sound an alarm if either is detected. The Nest Protect offers both photoelectric and ionization smoke detectors, as well as an electrochemical carbon monoxide detector for greater accuracy and reliability. The device also has a long battery life and is easy to install and maintain. With the Google Nest Protect, you can have peace of mind knowing that your home is protected against both smoke and carbon monoxide.

3. Kidde Smoke & Carbon Monoxide Detector

Brand	Kidde
Style	Detector
Power Source	Corded Electric
Color	White
Item Dimensions LxWxH	2.64 x 1.8 x 5.6 inches
Item Weight	0.75 Pounds
Alarm	Audible
Operating Humidity	10% to 95% relative humidity, non-condensing
Lower Temperature Rating	40 Degrees Fahrenheit
Compatible Devices	Up to 24 Kidde devices (of which 18 can be initiating)

The Kidde Smoke & Carbon Monoxide Detector is the perfect solution for your home safety needs. It is hardwired and interconnects with other compatible smoke and carbon monoxide alarms, giving you peace of mind that your home is safe. This pack of two detectors features a battery backup, voice alert, and an easy-to-read LCD display. With the Kidde Smoke & Carbon Monoxide Detector, you can be sure that your home is safe from the dangers of smoke and carbon monoxide.

4. Kidde Smoke & Carbon Monoxide Detector

Brand	Kidde
Style	Battery Powered Smoke and Carbon Monoxide Detector
Power Source	Battery Powered
Color	White
Item Dimensions LxWxH	5.22 x 1.6 x 5.22 inches
Alarm	fire safety, photoelectric, electrochemical, tamper-resistant
Operating Humidity	10% to 95% relative humidity, non-condensing
Lower Temperature Rating	40 Degrees Fahrenheit
Upper Temperature Rating	100 Degrees Fahrenheit
Sensor Type	Photoelectric, Electrochemical

The smoke and carbon monoxide detector from Kidde is a 10-year battery-powered detector that provides a voice alert in the event of smoke or carbon monoxide. This detector helps to protect your home and family, and is easy to install and maintain. It features a 10-year lithium battery that is tamper-proof and tested to last the lifetime of the detector. The voice alert warns of smoke and carbon monoxide levels, providing an extra level of security for your home. This detector is a great addition to any home and provides peace of mind that your family is safe.

5. X-Sense 10-Year Battery Combination Smoke Carbon Monoxide Alarm Detector

Brand	X-Sense
Style	Standalone Model
Power Source	Battery Powered
Color	White
Item Dimensions LxWxH	5.7 x 5.7 x 2 inches
Alarm	Audible
Sensor Type	Electrochemical

Introducing the Smoke and Carbon Monoxide Detector from X-Sense. This 10-year battery combination smoke carbon monoxide alarm detector with large LCD display provides an essential safety solution for any home. Equipped with advanced electrochemical sensors and a loud 85dB alarm, it is designed to detect both smoke and carbon monoxide, and alert you to their presence in the home. The easy-to-read LCD display shows the levels of each gas so you can easily monitor the air quality in your home. With a 10-year battery, you don't have to worry about replacing the batteries for a decade. Keep your family safe with the Smoke and Carbon Monoxide Detector from X-Sense.

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The Best Kidde Smoke Detector: Buyers Guide in 2025

10 Best Hardwired Smoke Co Detectors - Reviews With FAQs

Yes, combination smoke and carbon monoxide detectors are effective at detecting both smoke and carbon monoxide. These detectors are designed to alert homeowners to the presence of both smoke and carbon monoxide in the home. In addition to alerting people to the presence of smoke, combination smoke and carbon monoxide detectors also detect levels of carbon monoxide in the air and will alert homeowners when dangerous levels are reached. This makes them an ideal choice for homes with fireplaces, wood burning stoves, or other sources of carbon monoxide in the home.

Which is better smoke detector or carbon monoxide detector?

Both smoke detectors and carbon monoxide detectors are essential for home safety. However, which one is better depends on your particular circumstances. Smoke detectors are better for detecting fires, while carbon monoxide detectors are better for detecting dangerous levels of carbon monoxide. If you are trying to decide between the two, it is important to consider the type of hazards present in your home and choose the one that is best suited for your needs.

What is the best carbon monoxide and gas detector?

The best carbon monoxide and gas detector will depend on your specific needs and environment. Generally, the most reliable and accurate detectors are multi-sensor models that detect both carbon monoxide and natural gas. These types of detectors typically have a digital display that shows the levels of both gases and also come with audible alarms and/or visual indicators when levels become unsafe. Look for models that have been approved by Underwriters Laboratories (UL) to ensure the highest safety standards.

Can a carbon monoxide and smoke detector be the same?

No, a carbon monoxide and smoke detector cannot be the same. Carbon monoxide detectors detect carbon monoxide, an odorless and colorless gas, while smoke detectors detect smoke particles. Therefore, it is important to have both types of detectors in order to protect against both carbon monoxide and smoke.