The 8 Best Smart Smoke Detectors of 2023

The Google Nest Protect is your best bet

By

Anton Galang

Anton Galang

Anton Galang is a freelance writer and product tester with a Bachelor of Science in Journalism and 15 years of experience. His broad areas of coverage and interests include a focus on consumer technology and education

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Updated on 07/14/22

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Yoona Wagener

Fact checked by
Yoona Wagener

Yoona is a smart home and home tech commerce editor for The Spruce. She has contributed product reviews and how-tos for Lifewire and has prior experience in knowledge-base technical writing, technical customer support, and academic publishing.

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The Spruce / Lecia Landis

Placing smoke detectors throughout your home is a must, but internet-connected smart smoke detectors take fire safety a step further with advanced monitoring features and direct alerts to your smartphone anywhere you are.

To learn more about these devices, we spoke with an electrician experienced in installing smoke detectors and other smart home products. “We tell customers it’s great to have smoke detectors hardwired; that’s the best,” says Justin Landeen, vice president of business development and smart home installation manager for Penco Electric.

With installation in mind, we researched and tested available options based on other essential features, including sensors, app control, and smart assistant compatibility.

Here are our picks for the best smart smoke detectors.

Our Top Picks

Best Overall:

Google Nest Protect Smoke & CO Alarm at Amazon

Best Budget:

X-Sense XS03-WX Wi-Fi Smoke Alarm at Amazon

Best with Carbon Monoxide Monitoring:

Kidde Smoke and Carbon Monoxide Alarm with Smart Features at Home Depot

Best for Alexa:

First Alert Onelink Safe & Sound at Amazon

Best for HomeKit:

First Alert Onelink Smoke Detector and Carbon Monoxide Detector at Amazon

Best Smoke Alert Monitor:

Ring Alarm Smoke at Amazon

Best for Z-Wave:

First Alert ZCombo Smoke & Carbon Monoxide Alarm at Amazon

Best Fire Safety System:

X-Sense Fire Safety System at Amazon

In This Article

• Our Picks

• What to Look For

• FAQ

• Why Trust The Spruce

Amazon

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What We Like

• Smart device connectivity

• Alerts you before alarm sounds

• Auto-testing and battery monitoring

• Motion-sensor night light

What We Don’t Like

The Nest Protect Smoke and Carbon Monoxide Alarm Is Smart and User-friendly

The Google Nest Protect is a pioneering smart smoke detector that, in its second iteration, remains at the top of the market. Despite the high price tag, our tester gave it a full 5 out of 5 stars for its combination of quality and user-friendliness. As a testament to the easy setup process, our reviewer was able to install two battery-powered Nest Protect units (hardwired installation is an option as well) in the span of 20 minutes. The devices quickly connected to the Wi-Fi network and the Nest app, where heads-up smoke alerts come through and can be dismissed before the full, very loud alarm goes off.

The Nest Protect even features advanced technology in terms of smoke detection, combining the strengths of photoelectric and ionization sensors into a split-spectrum sensor that better detects both smoldering and flaming fires, in addition to greatly reducing false alarms. Our tester reported that this alarm “is smart enough to distinguish real smoke from shower steam or minor cooking smoke.” When compared with two other models he tested, the Nest Protect was the only device that didn’t sound as a result of cooking—despite being “mounted right next to one of the offending alarms. ” The built-in carbon monoxide (CO) detector is similarly accurate and lasts 10 years. The device also self-checks all its sensors and battery levels 400 times a day, with speaker tests once a month.

Besides notifications on the app, the Nest Protect itself issues voice prompts that describe what’s happening (and where), with the ring of light around the center button changing colors. The ring’s glow can be activated via a motion sensor in the dark, serving as a night light that became a surprisingly valuable bonus feature in our reviewer’s home.

Price at time of publish: $115

_{Power Source: Hardwired or battery | Compatibility: Wi-Fi, Google Home | Sensors: Split-spectrum | Extras: Carbon monoxide monitoring, battery self-check, voice prompts, motion-sensor light}

The Spruce / Nathan Borchelt

Amazon

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What We Like

What We Don’t Like

Any smoke detector with smart features will understandably cost more than a standard alarm, but with the XS03-WX Wi-Fi Smoke Detector from X-Sense, the price hike is much less dramatic. It represents an affordable way to connect your smoke detector to the internet and control it remotely through a mobile app. This model includes the ability to receive real-time alerts, silence false alarms, and check the status of the replaceable lithium battery.

With no option for wiring the XS03-WX directly to your electrical system, installing the device with the included mounting screws or adhesive is straightforward and quick. It fits well into just about any home setup, thanks to a compact circular shape at roughly 3 inches across and 2 inches deep. The smoke sensor is photoelectric, responding faster to smoldering fires than flaming ones, and there’s no carbon monoxide sensor (in this or any other X-Sense Wi-Fi models). For this reason, having separate ionization detectors and CO detectors is recommended for full coverage.

Price at time of publish: $40

_{Power Source: Replaceable CR123A lithium battery | Compatibility: Wi-Fi, X-Sense app | Sensors: Photoelectric | Extras: Battery self-check}

Amazon

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What We Like

• Reliable smoke and CO detection

• Voice commands and alerts

• Can interconnect with other alarms

What We Don’t Like

Kidde, a leading manufacturer of fire safety products, took some time before entering the smart smoke detector arena, but its Smoke and Carbon Monoxide Alarm with Smart Features is well worth considering if you’re looking for a device with double-duty detection. Beyond the established brand, as a UL-listed product tested and certified for reliable home use, you can feel confident in its performance with CO and fire hazards.

The Kidde Smoke and Carbon Monoxide Alarm requires hardwiring to your home’s electrical system, with a 10-year lithium battery as a backup. Connecting your Wi-Fi network unlocks its smart capabilities, including remote access, notifications, and a Smart Hush feature for false alarms. You can also issue commands through the Amazon Alexa or Google Assistant voice assistants (though it’s incompatible with Apple HomeKit), and the device itself provides voice alerts in addition to its 85-decibel alarm. Plus, if you happen to have other Kidde alarms that are hardwired and interconnected to this one, they all activate and send phone alerts when any of them go off.

Price at time of publish: $80

_{Power Source: Hardwired; lithium battery backup | Compatibility: Wi-Fi, Amazon Alexa, Google Home | Sensors: Photoelectric | Extras: Carbon monoxide monitoring, voice prompts}

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What We Like

• Built-in Alexa smart speaker

• Reliable smoke and CO detection

• Apple HomeKit and AirPlay support

What We Don’t Like

Although safety and peace of mind are top priorities for any smoke detector, the First Alert Onelink Safe & Sound adds a unique element of convenience and entertainment through a built-in Amazon Alexa smart speaker. You can ask Alexa to control other smart gadgets, tell you the news, read audiobooks, or play music straight from this smoke detector’s strong, premium speakers. The Safe & Sound also supports Apple’s HomeKit platform and AirPlay if you use Apple devices rather than Alexa. Either way, you will likely want to put the speaker to good use to justify a price that’s about twice as much as a Google Nest Protect.

On the safety side, the Safe & Sound holds up to the established reliability of the First Alert brand, with a photoelectric sensor and a carbon monoxide detector. It’s a hardwired alarm designed to easily replace your existing hardwired detector with a sealed-in 10-year lithium battery backup. It also includes a night light with customizable brightness and colors to help guide you in the dark.

Price at time of publish: $278

_{Power Source: Hardwired; lithium battery backup | Compatibility: Wi-Fi, Bluetooth, Amazon Alexa, Apple HomeKit | Sensors: Photoelectric, electrochemical | Extras: Carbon monoxide monitoring, voice prompts, smart speaker, customizable night light}

Amazon

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What We Like

• Reliable smoke and CO detection

• Alexa and Apple HomeKit support

• Can interconnect with other alarms

What We Don’t Like

For users of Apple iPhones, iPads, and the Siri voice assistant, finding devices that work with Apple’s HomeKit smart home ecosystem isn’t always easy. Fortunately, there are smart smoke detector options for HomeKit users, including First Alert’s Onelink Smart Smoke & Carbon Monoxide Alarm. Once you’ve connected it to your home Wi-Fi network and HomeKit, it can integrate with other HomeKit gadgets and any automations you’ve set up. This second-generation model is also compatible with Amazon Alexa for additional flexibility.

The Onelink smart alarm offers two-in-one smoke and carbon monoxide detection and the option to choose your power source: a hardwired model with a sealed 10-year battery backup or a version with a replaceable five-year battery and an easy-to-access battery door. The hardwired units can interconnect with compatible alarms, and the battery-operated ones can do so wirelessly. You also get remote app notifications common to smart smoke detectors, but Onelink notifications can be delayed and won’t trigger if an interconnected alarm sounds as opposed to the main unit.

Price at time of publish: $136

_{Power Source: Hardwired or battery | Compatibility: Wi-Fi, Amazon Alexa, Apple HomeKit | Sensors: Photoelectric, electrochemical | Extras: Carbon monoxide monitoring, voice prompts}

The 11 Best Smoke Detectors of 2023

Amazon

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What We Like

• Cheaper than most smart smoke detectors

• Provides remote alerts for non-smart detectors

• Simple to install and use

What We Don’t Like

• Ring Alarm system required

• No actual smoke/CO sensors

• Needs to be near smoke/CO detector

Today’s smart smoke detectors make it relatively efficient to connect your smoke alarms to the internet, but in certain situations a device like the Ring Alarm Smoke and CO Listener might be a worthwhile alternative. It’s not a detector itself but a gadget that you install near an existing smoke or CO detector (within 6 inches in this case) that listens for when the alarm goes off. Hearing an alarm then triggers the notifications that get pushed to your phone.

Importantly, the Ring Alarm Smoke and CO Listener requires the presence of a Ring Alarm Security System, so it makes sense primarily if you already have that smart security platform protecting your home. If you do, the listener adds a straightforward, easy-to-install fire prevention element to the mix. It’s worth noting that if you’ve signed up for professional monitoring through Ring, the listener will automatically dispatch the fire department to your home if it hears an alarm, with no way to cancel the call. This automation makes false alarms potentially costly affairs.

Price at time of publish: $35

_{Power Source: Lithium battery | Compatibility: Ring Alarm Security System (Z-Wave) | Sensors: Not applicable | Extras: None}

11 Home Security Companies We Trust

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What We Like

What We Don’t Like

Setting up your house with Z-Wave, a wireless mesh network (devices that work together to form one Wi-Fi network) generally dedicated to smart home systems, can offer several advantages over using more traditional Wi-Fi-only products. First Alert’s 2-in-1 Z-Wave Wireless Smoke Detector & Carbon Monoxide Alarm (sometimes called ZCOMBO) is a smart detector ideal for Z-Wave-based smart hubs like Samsung SmartThings, Ring Alarm, or Nexia Home Intelligence. But it’s incompatible with Wink or First Alert’s own Onelink system.

Besides using a different wireless protocol, the Z-wave alarm works similarly to other smart smoke detectors. It sends mobile alerts through the smart home app you connect to, though it lacks extra features like voice prompts or self-checks. A photoelectric smoke sensor and an electrochemical CO sensor give it more versatility and convenience, as does an easily accessible battery compartment for basic AA batteries. However, there’s no option for hardwiring it to your electrical system or wirelessly interconnecting it with alarms outside of your smart hub.

Price at time of publish: $47

_{Power Source: Replaceable AA batteries | Compatibility: Z-Wave, Ring Alarm, Samsung SmartThings, Nexia Home Intelligence | Sensors: Photoelectric, electrochemical | Extras: Carbon monoxide monitoring}

The Best Smart Home Hubs to Keep Your Home Connected

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What We Like

What We Don’t Like

The X-Sense Fire Safety System isn’t a single smoke detector but rather a set of six smart alarms (model XS03-iWX) and the required X-Sense SBS10 Base Station that serves as their hub. It’s a cost-effective starter kit if you know you want multiple smart alarms throughout your house, with individual units that work together and a network dedicated to keeping them connected.

Installing the system involves connecting the base station to Wi-Fi and syncing the wireless smoke detectors to the base station. If any of them detects smoke, all alarms are triggered, and instant notifications go to the mobile app, where you can silence the alert if it’s a false alarm. While you won’t get carbon monoxide monitoring, each unit performs automatic checks of its sensors and replaceable batteries every 60 seconds, with any issues pushed to the app. If you want to expand your system, you can purchase individual add-on XS03-iWX alarms to a maximum of 32 units.

Price at time of publish: $180

_{Power Source: Replaceable CR123A lithium battery | Compatibility: Wi-Fi, X-Sense app | Sensors: Photoelectric | Extras: Battery self-check}

Final Verdict

The Google Nest Protect, while pricey, has the safety and convenience features that make smart smoke detectors worthwhile—advanced smoke and carbon monoxide sensors, pre-siren remote warnings, frequent self-checks, voice prompts, and helpful motion-sensing light. As a less expensive option, the X-Sense XS03-WX Wi-Fi Smoke Detector still delivers real-time mobile alerts and the ability to check the status or silence alarms from afar.

Power Source

The power source options for smart smoke detectors remain the same as smoke detectors in general. Some have replaceable batteries that you must check and replace regularly. Others can be hardwired to your home’s electrical system to stay powered at all times, with a backup battery in case the power goes out.

Justin Landeen, vice president of business development and smart home installation manager for Penco Electric, recommends hardwiring but admits, “it’s not always the most cost-effective to hardwire an entire system.” Instead of a hardwired setup, he recommends “at least have battery-operated alarms in place and be very mindful of when the battery should be replaced.”

Sensors

Smoke detectors primarily use one of two types of sensor technologies: photoelectric and ionization. Photoelectric sensors tend to be more responsive to fires that have been smoldering for some time, while ionization sensors are quicker to pick up on flaming fires. Since dangerous house fires can be of either type, the recommendation is to have alarms with both types of sensors in your home.

Some smoke alarms use a combination of both sensor technologies. Currently, the only smart detector with the combined capability is the Google Nest Protect with its Split-Spectrum Sensor.

Advanced Features

One important distinguishing feature between smoke detectors is detecting dangerous levels of carbon monoxide (CO). Two-in-one detectors often cost more but save you the need for separate CO monitoring devices in critical areas, such as near the kitchen, garage, furnace, and bedrooms.

Another safety function of some smart smoke detectors is recurring automated checks of their sensors and battery to catch any issues between manual testing by the user. Other features like voice prompts or light indicators are offered mostly for convenience but can sometimes be surprisingly valuable in day-to-day use.

“I would go with a smoke detector like the Google Nest Protect that enunciates the location of the alarm, which is always important when it comes to exiting the building in a safe manner,” says Landeen. “They also act as a motion-sensing night light in the ceiling, helpful especially if you have a dark walk to the bathroom.”

FAQ

• Smart smoke detectors, like any smoke alarm, are meant to provide early warning of a fire in your home so that everyone inside can get to safety. The “smart” element connects your smoke detector to the internet so that news of an alarm can immediately reach you through your phone even when you’re away from home.

  Accessing your smoke detector from your phone can also have practical benefits outside of emergencies. Many products allow you to shut off or silence the alarm if you know it’s a false alarm. You can also test the batteries or other aspects of the device and see if there are any problems, all without needing to touch the smoke detector.

• Installation of battery-powered smart smoke detectors can be as simple as mounting the small device to your ceiling and connecting it to your home Wi-Fi network (or another wireless hub, depending on the product) to activate its smart features. For hardwired alarms, replacing existing units can be straightforward, but installing hardwired smoke detectors at new locations should be left to an electrician if you’re not experienced with the work.

  “Generally speaking, these are outlets—power sources that you are installing at different locations,” says Landeen. “If you have the option, or you’re in the process of building or renovating your home, without a doubt, it’s worth the extra money for a hardwired system.”

• In general, for smoke alarms, the National Fire Protection Association recommends at least one on every floor, inside each bedroom and outside each sleeping area, and near living spaces and stairways.

  As for placing smart smoke detectors, you can set some up as part of an interconnected system of smoke and/or CO alarms across your home. This setup lets you apply internet-enabled benefits to all of your alarms through just one smart smoke detector.

  “The interconnected portion is important,” says Landeen. “Who’s to say there’s not a fire in the basement, and you’re in a second-floor bedroom? The interconnected smoke detector will alert the entire home that there’s a fire.”

This article’s author, Anton Galang, is a freelance writer and editor who has worked with consumer technology for over 15 years. Since 2019, he has covered and reviewed a wide range of hardware, gadgets, and smart home products for Lifewire and The Spruce.

With the smart smoke detector market still relatively small, Galang researched the features, specifications, and reviews for most of the top options available, along with alternatives that performed similar fire safety functions. Galang also spoke with Justin Landeen, vice president of business development and smart home installation manager for Penco Electric, who contributed insights and recommendations from his experience with smart smoke detector installation in the Chicago area.

The Best Smart Water Leak Detectors to Safeguard Your Home

Sense | XS01-WX Wi-Fi Smoke Alarm/Detector

• Description
• Specifications
• FAQs
• 
  Reviews

Learn more about XS01-WX Wi-Fi Smoke Alarm

Wi-Fi Connection

Simply connect your alarm to the X-Sense app via a 2. 4 GHz Wi-Fi network to remotely control it.

Self-Check Function

The alarm auto-checks its battery, sensor, and electronics every 60 seconds to ensure proper functioning.

Real-Time Notifications

You will receive real-time alerts directly to your smartphone any time a fire starts and the alarm is triggered.

Silence at Your Fingertips

Tap the button in the app to silence any alarms without the need to climb a ladder to reach the test/silence button.

An insect-proof mesh isolates the sensor from insect interference for accurate, responsive detection.

This detector has a slim, contemporary design that can be mounted discreetly on any wall or ceiling.

As the battery gets weak, a low battery warning will let you know that it needs to be replaced.

Power Supply	Replaceable 3 V CR123A lithium battery	Color	White
Operating Life	10 years	Material	ABS
Battery Life	1 year	Installation Method	Screw fixings and mounting bracket supplied
Sensor Type	Photoelectric	Usage	Indoor use only
Coverage Area	215–430 sq. ft (20–40 m²)	Product Weight	0.20 lb (92 g)
Operating Temperature	40–100°F (4.4–37.8°C)	Product Dimensions	3.0 × 3.0 × 1.9 inches (78 × 78 × 48 mm)
Operating Relative Humidity	≤ 85% (non-condensing)	Package Contents	1 × Alarm Unit + 1 × Mounting Bracket + 2 × Screws + 2 × Anchor Plugs + 1 × Pin + 1 × User Manual
Alarm Volume	≥ 85 dB at 10 ft (3 m) @ 3.2 ± 0.3 kHz pulsing alarm	App	X-Sense Home Security (both Android and iOS supported)
Silence Duration	About 9 minutes	Wireless Frequency	2.4 GHz (incompatible with 5 GHz Wi-Fi Network)
Indicator Light	LED (red/blue)	Wireless Protocol	IEEE 802. 11b/g/n

User Manual

FAQs

What are the differences among the XS01-WR, XS01-WX and XS01-WT?

 

XS01-WR: A wireless interconnected smoke alarm that can be interlinked with up to 24 X-Sense wireless alarms. If one alarm is triggered, all alarms will sound, delivering earlier alerts.
XS01-WX: A smart Wi-Fi smoke alarm that can be connected to Wi-Fi via the X-Sense Home Security app. Find out what’s going on in and around your home from the app notifications while you’re away.
XS01-WT: A smart Wi-Fi smoke alarm that can be connected to Wi-Fi via the TuyaSmart/Smart Life app. It sends alerts to your phone and lets you know what’s going on in and around your home, even when you’re away.

What will happen if the Wi-Fi connection is lost?

 

If your Wi-Fi loses connection, the app page will show OFF, and you cannot control the devices via the app. But the devices will work as standalone units as usual.

Why is it not accessing the Wi-Fi?

 

Make sure you have a stable 2.4 GHz Wi-Fi network and have enabled Bluetooth on your phone. Then add the X-Sense XS01-WX smoke alarm to the app. Please ensure that you connect to the same Wi-Fi network when you add the device to the app.

How do I add more users to the app so they can all monitor the alarms on their phones in the X-Sense app?

 

Go to the smoke alarm’s Device Settings interface and select Device Sharing. Then enter the X-Sense accounts that you’d like to share with.

How many Wi-Fi smoke alarms can be connected to the app?

 

You may add up to 24 X-Sense XS01-WX smoke alarms in one home. You may also give them different names so that you know which one has been triggered when you receive a push notification.

Will this device connect with other X-Sense XS01-WR alarms?

 

No, this Wi-Fi smoke alarm cannot be interconnected with XS01-WR wireless interconnected smoke alarms.

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WiFi smoke detector with FULL HD camera + IR LED + mobile

Item code: 10-534

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Product Description WiFi Smoke Detector with FULL HD Camera + IR LED + Mobile

WiFi smoke detector with FULL HD camera + IR LED + mobile app. With motion detection and night vision, the gives you a constant overview of what’s going on in your home. The concealed in the smoke detector is equipped with a built-in 5200 mAh battery which, when fully charged, provides the with 1 year of standby time. Thanks to its unobtrusive design , it fits into any interior, while no one knows that this is a device with a hidden camera. The camera has a 15° adjustable vertical angle lens for fine adjustment of the viewing angle. It can be used in every home, office, warehouse, garage, cottage and so on. Undoubtedly, the most important and useful feature is unobserved environmental monitoring. The fire alarm camera does not have a smoke detection function (it is just an imitation of a smoke detector).

Hidden camera in smoke detector

The built-in hidden camera records video in Full HD 1920 x 1080 resolution with sound, enough for detailed shots. Thanks to the IR LED night vision up to 5 meters away, you will have a high-quality image even at night. The detector supports Wi-Fi connection and is wireless, , which allows the to be placed directly anywhere in the interior. You can control all functions of the hidden camera remotely through the free application “CamSC” for smartphones (iOS, Android), with which you can view live images and change camera settings. The camera detector can be connected to your home router via WIFI, allowing you to monitor the image of anytime, anywhere with your mobile phone.

The camera also includes the motion detection function, which is used to start recording when capturing motion in space. The sensor has a range of 5 meters. Great feature that makes you don’t miss any important frame, because frames will only be taken during activity. Captured recordings are compressed with H.264 to reduce the file size and then saved on a supported micro SD card up to 64 GB in size . Two-way audio allows two-way communication from a distance – you can calm your pet, talk to your baby, etc.

Motion detection, night vision , live video view – see what’s happening in your home

Functions:

Hidden camera in the smoke detector
Wi-Fi real-time image transmission
Standby battery life 365 days
Motion detection function
IR LED night vision up to 5 meters

Features:

Image sensor: FULL HD 1920x1080p
Lens: CMOS 2MP
Photo resolution: 1920×1080 pixels
Video resolution: 1920×1080 pixels
Frame ratio: 15 fps
Compression format: H. 264
Loop recording: yes
Adjustable camera angle: 15°
Scan angle: 145° 9009 1 Night range vision: 5 meters
Motion detection: yes, PIR sensor with a range of 5 meters
Memory card: supports Micro SD cards up to max. 64 GB (not included)
Power supply: 5200 mAh rechargeable lithium battery
Wi-Fi: Wi-Fi 802.11 b / g / n
Charging time: 12 hours
Charging: Micro USB
Cable: 11.6×11.6×5.2 cm

Content package:

1x smoke detector from smoke from FULL HD Camera
1x USB Cable
1x USB Micro SD Card Reader
1x Mounting Screw Kit
1x 3M Sticker
1x Manual

Comments

Wireless Smoke Detector with WiFi Tuya

Hi all! Carbon monoxide monitoring is already in the garage and the system is periodically outraged by poor ventilation when the car is running, I recently stumbled upon a smoke detector and decided that it would not be superfluous either. The model is equipped with a WiFi module that allows you to integrate it into a smart home system, include it in automation scenarios and receive notifications on your phone when the Internet is available. You can also use it without connecting to the network, in which case the subject will simply squeak quite loudly and blink the indicator when smoke is detected. More details under the cut.

Characteristics

Material: flame retardant ABS
Power: 9V (size 6F22)
Battery life: 2 years
90 140 Alarm volume: 110dB
Size: 110x32mm

Unpacking and appearance of

The package at the post office was doused with some kind of sticky muck, I had to wear gloves

The box also got

On the reverse side, brief characteristics

At the end of the QR codes for downloading applications, I generally used BlitzWolf

Inside smoke detector, hardware and waste paper

Rear cover can be opened by turning it anti-clockwise, allowing quick mounting of the housing

Powered by 9V battery 6F22(Krona)

On one of the faces there is a place for a microUSB connector, apparently there are wired versions

The only control element and indicator is the central button

Manual

Connection and testing

The detector can be used immediately after switching on, a short press of the button starts the test

If you hold down the button for a few seconds, pairing mode is activated

We enter the Tuya, Smart Home or BlitzWolf application, which I usually use. Press the plus sign, enter the section security / smoke detector and select the WiFi protocol. We enter the data of the home network, confirm that the pairing indicator is flashing and wait for the connection

After adding, the system offers to run a test that remotely activates the alarm. There are no special settings, just select alerts for low battery and smoke detection. When triggered, a notification pops up in the curtain, a pop-up window is created and a record is created in the history, so it will be difficult to miss

As for the operation, at first I thought that a marriage was caught or it would squeak when the body starts to melt. He slipped burning and smoking papers, zero reaction. Father came, asked why he smoked in the garage, replied that this crap should squeak in the smoke, but she was silent. He inhaled, exhaled on the body, and after a few seconds the alarm went off … Apparently, when the paper is smoldering, the smoke is too hot at a short distance and passes in a trickle up along the body without lingering in it, but the cooled one is already evenly distributed over the area and penetrates into the slots of the sensor, the alarm turned off after 20 seconds as weathering

As for sensitivity, in a 6×3 meter garage, the sensor is located on the ceiling in the center, while 1-2 people can smoke without consequences at a distance of several meters, and for three it starts to squeak after a few minutes and calms down far from immediately. It reacts even faster to a smoking oily rag, but it gives out quite thick smoke.

In general, the detector is working, but it does not work well as a smoke repeller, unless, of course, there are enough of them to create haze in the room (the most for toilets in student dormitories).
I also met on the net that there are too sensitive models that react to water boiling in a saucepan when installed in the kitchen. I held it over the kettle until it boiled, the alarm did not work, although the body was wet outside, and probably partially inside. In theory, this is of course possible, but the steam must be very hot in order to stay in the air long enough to penetrate the sensor.

Autonomy

In standby mode, the consumption is about 10 μA, the sensor is polled every 2 seconds and the value jumps up to 100 μA for a fraction of a second. During an alarm, the current rises to 100mA. If the siren does not squeak constantly, it is quite hard to believe in 2 years of operation from one battery.

Inner world

The case is fixed with four screws, inside there is a small board with a sensor and a piezo emitter

There are a few more elements on the reverse side, the markings on the main ones are worn

The sensor is not very complicated. It consists of a plastic chamber, a light emitter and a receiver protected from it. Under normal conditions, the light is absorbed by the partition and the system is at rest, but if smoke particles enter the chamber, at a certain concentration they begin to reflect too much light, it is detected by the receiver and the alarm is activated

Coupon

BGcf5859 reduces the price to $11.99 , delivery to Russia will cost another $2 , total $14

Totals

Definitely a useful thing for a room, because even a pan of burnt food (there was an experience) can cause quite a lot of trouble, not to mention a full-fledged fire. I installed in the garage next to the carbon monoxide detector. In a room of 3×6 meters, it does not react to one or two people who smoke, unless you specifically exhale on the body, but it already kicks out three people with an alyarm. Usually this happens when the haze becomes visible in the light of a lantern or light bulb, but everything is logical, because the sensor works according to this principle. The speaker is loud, you can hear it squeaking from the garage in the house. Krona is used as a battery, but taking into account consumption, it will not have to be changed very often, so it’s not such a big minus. The network does not lose, you can create scenarios when triggered, for example, turn off the gas in the room (if there is automation), turn it off and activate the pump that supplies water to the sprayers on the ceiling. By the way, I want to organize the last two points in the garage for a long time. once an extension cord caught fire due to a short circuit and miraculously the fire did not spread further. De-energizing is easily done from cheap smart home modules, and a fire extinguishing system can be assembled from high-pressure sprayers for a greenhouse / garden.