The Best Smoke Detectors

5 Best Smoke Detectors

Are you looking for one of the best smoke detectors for your kitchen and home? This buying guide is here to help you know which one suits you.

A smoke detector sensor picks up smoke as the main sign of a fire. It creates an audible and visual alert locally in a room or house, or it sends a signal to the fire alarm system in a big structure.

Smoke detectors are often installed at the ceiling where there are fire dangers or risks of fire in small, round plastic cases. Smoke can be sensed physically or visually (photoelectrically). Detectors may use one or both detecting techniques.

Half reduces the probability of perishing in a domestic fire in homes with functional smoke detectors. As opposed to 1.18 deaths without working smoke detectors, the US National Fire Protection Association reported 0.53 deaths per 100 fires in houses with them (2009–2013).

Smoke detectors for homes can be standalone battery-powered units or a network of connected units with a battery backup. If one of the interconnected devices senses smoke, alarms will sound across the whole system. So even if there is no electricity in the home, this still occurs.

Types Of Smoke Detectors

Ionization Smoke Alarm

Their primary distinction is the sort of flames that ionization and photoelectric technologies detect. Ionization smoke alarms detect flames with aggressive and open flames. The fire is typically started by lighting open flames, flammable liquids, wood, or paper near combustible things.

Ionization smoke alarms function by sandwiching a small radioactive component between two electrically charged plates. The electrical current created by the air’s subsequent ionization between the plates is disrupted by the smoke particles, setting off the alarm.

Photoelectric Smoke Alarm

This kind of detector performs better at spotting flames that smolder for a considerable amount of time. Smoking materials, such as cigarettes, are commonly left unattended, which leads to smoking flames that are sluggish and flameless.

To detect smoldering fires, photoelectric smoke alarms direct a source of light into a chamber equipped with a light sensor. Smoke particles obstruct the light beam as they enter the chamber, which emits light onto the sensor and sets off the alert.

Dual Sensors

Ionization and photoelectric sensors are examples of dual sensors. These smoke and fire detectors are regarded as the safest ones.

There is little chance that any fire-related hazard will elude these dual-purpose sensors since they can distinguish between larger burning and smaller, smoldering fires.

Features Of The Best Smoke Detectors


The best smoke alarms are capable of spotting fires, carbon monoxide, and smoke particles. You may conserve battery life or energy by using a multipurpose alarm instead of hardwired smoke detectors in your home. More than ever, it is simple to locate combined smoke, fire, and carbon monoxide detectors.


While traditional smoke detectors like ionization and photoelectric are still useful, smart smoke detectors are the future of fire protection. When an alarm goes off, they interact via applications and send alerts to your smartphone or other mobile devices.

You’ll know precisely where the fire is when an alarm is activated since smart alarms can communicate. The price of smart gadgets is the only drawback.

Backup Power

You are still required to know if there is a fire or smoke hazard if the power goes out at your house. Hardwired smoke detectors require a battery backup or emergency power to function.

Your smoke detector is also lost if the power goes off. So whenever the battery starts to run low, battery-operated smoke detectors have to feature a test button or chirp.

Check The Local Laws

Check local laws before you go shopping. You should be aware of any special rules your municipality or state may have regarding the usage of various detector kinds and locations. Additionally, some insurance providers give discounts to homeowners that install smoke detectors.

Choose A Power Source.

Hardwired carbon dioxide and smoke monoxide detectors are connected to your home’s wiring and typically contain backup batteries. Professional installation is necessary.

The simplest to install detectors are battery-only models, which also function in power outages. While some versions utilize sealed lithium batteries that span the lifetime of the detector, others use replaceable batteries that need to be replaced annually.

Choose Smart Or Not

Smart smoke and carbon monoxide detectors provide the advantage of knowing if something is wrong while you’re not home, but they are also quite expensive.

Additionally, if you want to use this kind in your house, I advise adding more dual-sensor smoke detectors as well. Smart detectors will communicate with other sensors of the same kind, whether they are hardwired or powered by batteries.

There aren’t many smart models available, but I anticipate that will change once smoke and CO detectors are included in the new Matter standard for smart homes.

The UL Certified Stamp Should Be Evident

To ensure that the detector has completed UL Solutions testing, look for a UL Certified sticker on the box. Additionally, check the detector’s back for the manufacturing date printed there.

The more recent, the better, as equipment loses its attentiveness over time. Replace smoke and carbon monoxide detectors, on average, every 10 years and every five years, respectively.

Updated requirements from UL Standards & Engagement, a division of the previous Underwriters Laboratories that concentrates on standard-setting, will compel all manufacturers to produce smoke detectors that can differentiate between cooking smoke and smoldering fires.

Its revised effective date of June 30, 2024, has been postponed twice due to supply chain concerns from the previous deadline of the end of June 2021.

It is anticipated that manufacturers won’t be allowed to continue producing conventional single-sensor (photoelectric or ionization) smoke detectors as part of the new standard from UL Standards & Engagement.

Think About Voice Alerts

Children often sleep deeper than adults, so a traditional alarm clock may not wake them up. Although some smoke detectors and smoke and carbon monoxide detectors employ voice commands, it is unknown if this is the best technique to wake kids up.

One research found that their mother’s recorded voice awakened more kids between 6 and 12 than a tone alarm.

Installation And Upkeep

Only properly fitted smoke and carbon monoxide detectors and those whose batteries are changed regularly provide protection. Smoke rises. Therefore place smoke detectors 12 inches underneath the ceiling on a wall or the ceiling.

Weekly smoke and CO detector testing and monthly vacuuming are recommended. Follow the manufacturer’s advice while changing the battery. Smoke detectors should be replaced every ten years and carbon monoxide detectors every five.

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Specifications Of The 5 Best Smoke Detectors

ProductsWeightProduct’s DimensionBatteryPower SourceManufacturer
X-Sense Smoke and Carbon Monoxide Alarm‎1.01 pounds‎5.7 x 5.7 x 2 inches1 Lithium Metal battery is required. (included)‎Battery PoweredX-Sense
Kidde Smoke Detector‎9.7 ounces‎2 x 1 x 1 inches‎1 9V battery required. (included)‎Battery Powered‎Kidde Safety
FIRST ALERT BRK SC9120FF Hardwired Smoke and Carbon Monoxide (CO) Detector ‎4 ounces‎5.6 x 5.6 x 1.9 inches1 9V battery required. (included‎Battery Powered, Hardwired‎First Alert
First Alert 9120B Smoke Detector‎12.8 ounces‎5.6 x 5.6 x 2.2 inches‎1 9V battery required. (included)Battery PoweredFirst Alert
Google Nest Protect Smoke Detector‎1 pound‎5.3 x 1.5 x 5.3 inches6 Lithium Metal batteries are required. (included)Battery Powered‎Google Nest

5X-Sense Smoke and Carbon Monoxide Alarm

X-Sense Smoke and Carbon Monoxide Alarm

Making it to this list of the best smoke detectors as the 5th best is the X-Sense Smoke and Carbon Monoxide Alarm.

This gadget eliminates the need for battery replacement by providing 10 years of uninterrupted power thanks to a built-in lithium battery.

A photoelectric smoke sensor and an electrochemical CO sensor are also included in the smoke and carbon monoxide detector, which can detect smoke and harmful CO levels.

Furthermore, this device makes it very evident how much carbon monoxide is present in the air around you in real-time, as well as how much battery life is left and whether the alarm is operational.

The LED indicator will flash red four times every 5.8 seconds, and the screen will be backlit blue if there is a CO concentration of 30 to 999 ppm for a specific amount of time.

X-Sense Smoke and Carbon Monoxide Alarm is simple to mount and doesn’t require any rewiring. With the mounting bracket, screws, and anchor plugs that are provided, this fire and CO alarm may be put on any wall or ceiling.

Exceptional quality and protection are ensured by the use of premium PC material, which has been certified by the ETL and complies with UL 217 and UL 2034 safety requirements.

The battery level is visible at a glance, and the display shows the present CO levels in your house. You get the most recent readings because it refreshes every 10 seconds.

If there is a problem too, the display’s color will change to let you know. For example, green indicates everything is in order, yellow indicates the alarm is malfunctioning, and red indicates the alarm is going off.

This combination of a smoke and carbon monoxide detector has the additional benefit of reducing false alarms.


  • 3 air samples are needed before the warning is raised.
  • Furthermore, this device features two sensors.
  • LED display.
  • Even more, you can now quickly turn off the alarm on your smartphone app.
  • Also, no wiring is necessary.
  • Furthermore, it has a low cost and excellent value.
  • This gadget gave a quick response during the smoke test.
  • Additionally, it can identify CO and smoke.
  • The CO levels are displayed.
  • Even more, it has a .prolonged battery life.
  • Also, it is ETL-approved.
  • Lastly, installation and setup are simple.


  • Lack of ability to link to other smoke detectors.
  • Also, it cannot be switched off (unless you want to do it permanently).

4Kidde Smoke Detector

Kidde Smoke Detector

Making it to this list of best smoke detectors as the 4th best is the Kidde Smoke Detector.

Additionally, the installation requires no hardwiring because it attaches simply to the ceiling using a supplied bracket, and the battery can be changed easily at the alarm’s back.

The Kidde smoke detector includes a 10-year limited warranty and UL certification. In addition, the Kidde alarm is simple to install and only needs a few common items that most households probably already own.

It’s never been simpler to change batteries than with the Kidde smoke detector. Additionally, it may be linked to additional alarms to form a complete home smoke detection system.

My main worry was where I was going to put the Kidde dual alarm. Because smoke tends to ascend. Thus many smoke alarms are placed on or very near the ceiling.

But at the other hand, carbon monoxide neither sinks nor rises. Instead, it spreads across rooms because it is only a little bit lighter than air. I had heard that CO detectors must be positioned between knee level and five feet because of this.

Given those considerations, I couldn’t figure out how you could position a single combo unit in the best way.

But after more investigation, I discovered something. According to Kidde, this alarm performs best when set high up on a wall or ceiling.

When mounting an alarm on a wall, you must maintain a minimum distance of 4 inches and a maximum distance of 12 inches between the border of the alarm and the ceiling. It must be at least 4 inches from the side wall if installed on the ceiling.

When installed properly, the Kidde combination alarm will combine electrochemical and ionization-detecting technologies to instantly notify users of dangerous amounts of carbon monoxide and smoke.


  • This device detects hazards from fire and CO.
  • Also, battery replacement is simple.
  • Even more, it has a voice-based alert system.
  • False alarm feature with hushed mode.
  • Even more, the device is not plugged in.
  • In addition, it is similar to other Kidde products’ mounting methods.
  • Fast-changing battery
  • Interconnectable


  • This device has compatibility issues with older models.

3FIRST ALERT Smoke and Carbon Monoxide (CO) Detector 

FIRST ALERT BRK SC9120FF Hardwired Smoke and Carbon Monoxide (CO) Detector 
Amazon image

The 3rd best in this list of best smoke detectors is the FIRST ALERT BRK SC9120FF Hardwired Smoke and Carbon Monoxide (CO) Detector.

The First Alert SC9120B Hardwired Combination Smoke and Carbon Monoxide Alarm is a hardwired alarm with a battery backup. A 9-volt battery backup is included in the hardwired detector to ensure ongoing operation in the case of a power loss.

This hybrid CO and fire detector have tamper-resistant lock brackets and a test/silence button. In addition, the alarm has easy-adapter connectors, so there is no need to rewire it, and it can be linked to other compatible BRK, and First Alert hardwired smoke and carbon monoxide detectors.

Even after the circumstances that triggered the alarm have passed, its latching alarm indication automatically determines which detector was the alert’s initiator.

The First Alert Combination Smoke and Carbon Monoxide Alarm detects two dangers, smoke and carbon monoxide, and was created to adhere to the most recent building regulations. Lights on the alarm’s front show the threat, and false alarms may be hushed by pressing a single button.

A universal mounting bracket and integrated wiring allow the First Alert Combination Smoke and Carbon Monoxide Alarm to be quickly and easily installed. The 9-volt battery may be easily changed thanks to the side-load battery box. Tamper-proof locking pins stop the CO smoke alarm from being turned off without authorization.

All carbon monoxide alarms made by BRK Electronics have been certified to meet UL Safety Standard 2034 for residential carbon monoxide alarms. Includes a backup battery of 9 volts.

Limited guarantee for 10 years. All included are smoke/CO combo alarm, one 9-volt battery, and a user’s guide.


  • This device is a carbon monoxide and smoke alarm that is hardwired.
  • Also, it has an 85 dB alert siren volume.
  • Even more, it is compatible with first alert detectors or BRK detectors.
  • Furthermore, this device has mounting brackets that are universal for simple installation.
  • Also, it has backup batteries.
  • Lastly, this gadget links to other alarms.


  • This device does not eliminate false alarms.

2First Alert 9120B Smoke Detector

First Alert 9120B Smoke Detector
Image: amazon

Making it to the 2nd best spot on this list of the best smoke detector is the First Alert 9120B Smoke Detector.

The First Alert 9120B Hardwired Smoke Alarm with Battery Backup is intended to increase family safety and offer a crucial first fire warning. The ionization smoke sensor in this hardwired smoke detector successfully detects smoke from intense, rapidly blazing flames.

A very dependable ionization sensor is included with the First Alert 9120B Hardwired Smoke Alarm with Battery Backup to deliver the earliest possible warning of a quickly spreading fire.

The sensor is designed to find blazing flames, such as those started by paper, cooking oil, and other quickly igniting substances.

This smoke alarm includes a simplified mounting method and a gasket-free base to make installation simple. The mounting bracket maintains precise alignment while keeping the alarm secure across a large rotation range.

It also includes a dust cover to keep the alarm unit clean while being built. All local electrical requirements must be followed when installing AC-powered smoke alarms.

This smoke alarm has a battery backup in addition to being wired for installation, which helps to ensure ongoing operation in the case of a power outage. The alarm is pre-installed with a 9-volt battery. In addition, the device has a rotating, easily accessible battery drawer that makes it possible to swap out the battery without taking the alarm apart.

This smoke alarm may work alone or in conjunction with up to 12 other First Alert or BRK hardwired devices to cover bigger areas. Additionally, it combines with up to six other suitable gadgets, including repeaters, bells, and horns.

The alarm has a latching indication that lets you know which device set it off and alerts you to the danger zone.


  • This gadget sets off an alarm when the battery is low.
  • Also, it has a manufacturer’s guarantee of ten years.
  • Even more, it has an 85 dB loud alert.
  • Furthermore, it is simple to install.
  • This device is also efficient in spotting quickly flaming flames.


  • This device is not capable of detecting smoldering flames.

1Google Nest Protect Smoke Detector

Google Nest Protect Smoke Detector

The best smoke detector in this list is the Google Nest Protect Smoke Detector.

Nest Protect offers carbon monoxide detection as well as two different forms of smoke detection owing to its dual-sensor technology, making it three life-safety devices in one.

Most smoke alarms may either detect fast-burning or simmering flames depending on how they detect fires. Google Nest Protect can pick both up for quicker, more precise identification of potentially unsafe circumstances.

Additionally, Google Nest Protect connects to the Nest app, which customers may connect to the smoke detector to receive alerts even while they aren’t at home. Nest Protect will notify the user’s phone if it detects carbon monoxide or smoke or is just running low on charge.

Your house is safeguarded in several ways by Google Nest Protect. Yes, it can detect smoke, but because of its split-spectrum sensor, it can also detect fires without active flames and smoke. In addition, with the use of an electrochemical sensor, it can also find carbon monoxide.

The Nest Protect will flash its integrated light, sound an alarm, and utilize voice warnings to let you know precisely what kind of emergency it is detecting when a smoke or carbon monoxide detector is activated. Through the app, it may also send notifications to your phone.

Users may link several Protect detectors around the house using the Nest app, which is quite advantageous since if one device warns, all of the devices will turn on.

Additionally, because Google Nest Protect uses audio alarms, it will accurately describe the danger and its location to anybody around.

Finally, even though Nest Protect only has a speaker-like appearance, it features an integrated pathway light that, upon motion detection, emits a blue nightlight.


  • This device performs the detection of smoke and carbon monoxide using two sensors.
  • Even more, it has distinct voice alerts.
  • Also, this device interfaces with portable electronics.
  • Further, it is more stylish than other detectors.
  • Additionally, it has a simple installation.
  • Alerts in a kind voice.
  • Also, path lighting.
  • This device also gives mobile alerts.
  • Battery warnings are in-app.
  • Lastly, it gives an alert for carbon monoxide.


  • It is expensive.

Frequently Asked Questions On The Best Smoke Detectors

1. Is Kidde Or First Alert Better?

Due to the alarm system with a vocal warning of the hazard, First Alert offers more functions than Kidde.

2. Which Smoke Detector Has The Fewest False Alarms?

During smoldering stage fires, photoelectric smoke alarms sound tens of minutes sooner than ionization smoke alarms while producing much fewer false alarms. The photoelectric alarm is ideal since it performs similarly to ionization alarms in blazing stage fires.

3. What Are The 3 Types Of Smoke Detectors?

Smoke alarms come in three different varieties: ionization, photoelectric, and a hybrid known as a “dual” detector.

4. Which Is Better, Wired Or Battery Smoke Detectors?

Hardwired smoke detectors, however, outperform their battery-powered equivalents after they are installed in terms of safety, effectiveness, maintenance, and conformance with local standards.

5. Are 10-Year Smoke Detectors Worth It?

Owning and putting a 10-year sealed battery alarm in your house has several advantages. Battery replacement is not necessary every six months. Stop the late-night chirps of low battery. You will receive a notification when the alarm is nearing the end of its useful life.

My conclusion On The 5 Best Smoke Detectors

Above are the details, benefits, and drawbacks of my picks for the Best Smoke Detectors. Every aspect of this purchasing guide has been carefully explained, and I know that after reading this, you can decide which Smoke Detectors you want to buy.

I chose Google Nest Protect as the best smoke detector, even though it is rather pricey since it is just so incredibly useful. The app eliminates the aggravation associated with conventional fire alarms in addition to being able to detect carbon monoxide and many sorts of fires.

It obtains excellent results in my testing for detecting low CO levels and smoldering fires, as well as a Good grade for doing so.

The Google Nest Protect is available in hardwired and battery-powered variations and can communicate with other Nest Protects.

However, based on my study, I have chosen the “Google Nest Protect Smoke Detector” as my “Best Smoke Detector”. I’ve also included a button with links to each smoke detector purchasing page to make it simple. Therefore, if you click on any of them, you will undoubtedly be directed to the store.

I hope you found these 5 Best Smoke Detectors buying guides helpful. Then, kindly review this buying guide with the “Leave a Reply” form at the end of this page.

In addition, you might want to read other articles on our website. Then, visit our Appliances & Gadgets section.

Further Readings And References – How to Install Hardwired Smoke Detectors – Circuit Breaker Identifiers: What You Need to Know – Circuit Breaker Finder: How to Use & What to Consider When Buying One?

Akin-Ojo Olamilekan is a technical writer at He is currently pursuing his MBBS Degree. Mike enjoys surfing the internet and listening to music. When he is not writing, he reads, sings, or practices his talking drum. Mike writes reviews, buying guides, and best-pick articles for
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