Smart Smoke-Gas Leak.

Conventional smoke and gas detectors are inherently dumb devices. Their alarms might be loud, but if no one’s home to hear them, what good do they accomplish?

Dangerous gas leaks like carbon monoxide are invisible and undetectable to our senses and to ordinary devices like a smoke alarm. They’re also colorless and odorless, and can cause symptoms such as memory loss, shortness of breath, even death in the most extreme cases.

Most smart smoke, gas leak detectors are primarily designed to detect combustible gases or toxic gas and react by displaying a reading, setting off an audible or visual alarm and/or sending an alert to your smartphone - if danger is detected.

They work in different ways, depending on the gas they are targeted toward, and the device should be used exactly as the manufacturer describes.

The manufacturers are very specific about which gas or gases their detector will sense. Below, are some of the common gases you'll have to pay attention.

• Combustible Gases. Natural gas mostly comprising methane and propane have an additive called mercaptan that smells like rotten eggs.
• Toxic Gases like Carbon Monoxide. Exposure to high levels of colorless odorless carbon monoxide (CO) from a leaking appliance or a vehicle running in an attached garage is harmful, and can be fatal.
• Radon. While a concentration in your basement or crawl space may not cause your home to explode the way propane or natural gas can, it’s radioactive and is the second leading cause of lung cancer.

1. Google Nest Protect - Smoke Alarm - Smoke Detector and Carbon Monoxide Detector.

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Smoke detector and carbon monoxide detector that speaks up in a friendly voice to give you an early warning when there's smoke or CO in your home. Split Spectrum Sensor looks for both fast burning and smoldering, and tells you where the danger is. Get phone alerts so you know something's wrong even when you're away from home. CO detector looks out for carbon monoxide and tells you where it's located. With App Silence you can silence the smoke alarm with your phone in the Nest app when there's only a little smoke. No chirps to tell you the battery is low. Nest Protect tests its own batteries and gives you a Nightly Promise when you turn off the lights so you know everything is working. A Light in the Dark. Usually Nest Protect has its light turned off but when you walk underneath it Pathlight can light your way. Gases detected. Carbon Dioxide (CO2). Rating: 4.7 of 10,183 Ratings in Amazon.

2. Google S3003LWES Nest Protect Alarm-Smoke Carbon Monoxide Detector.

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Phone Alerts. Nest Protect sends you a message when there's a problem or the batteries run low. Smoke and CO Locator. Nest Protect speaks up if there's smoke or CO and tells you where it is so you know what to do Detects CO: Carbon monoxide is an invisible poisonous gas. Nest Protect tells you where it's hiding. A Light in the Dark. Usually Nest Protect has its light turned off but when you walk underneath it Pathlight can light your way. Fast Detection. Every second counts. The Split-Spectrum Sensor looks for both fast and slow burning fires.  Know from anywhere. Connect Nest Protect to Wi-Fi and it will send an alert to your phone if the alarm goes off or the batteries run low. Wireless. Working Wi-Fi connection: 802.11b/g/n @ 2.4GHz Wireless reconnect: 802.15.4 @ 2.4GHz Wireless Interconnect: 802.15.4 @ 2.4GHz Bluetooth Low Energy (BLE). Tells you what and where: It speaks up to tell you if there's smoke or CO and where. Gases detected. Carbon Dioxide (CO2). Rating: 4.7 of 10,183 Ratings in Amazon.

3. First Alert Z-Wave Smoke Detector & Carbon Monoxide.

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Help keep your family safe with this battery-powered smoke detector and carbon monoxide alarm; includes 2 AA batteries. This device is certified to work with Ring; Enjoy improved compatibility, easier setup and a seamless in-app experience. Receive real-time notifications in the Ring App when smoke or carbon monoxide is detected.  The Z-Wave Plus with Smart Start feature allows a faster and more intuitive connection of device to hub and on-boarding via QR code scan located on device. Certified to work with smart home systems such as Ring Alarm, Samsung SmartThings, and Nexia Home Intelligence when connected to a Z-Wave Plus gateway hub (sold separately; Not compatible with Wink or Onelink). Photoelectric smoke sensor helps reduce false alarms caused by cooking or shower steam. Includes an 85-decibel horn, single test/silence button, side access to a tamper-resistant battery door, and pins that lock the alarm to the mounting bracket. Gases detected. Carbon Dioxide (CO2). Rating: 4.6 of 6,200 Ratings in Amazon.

4. First Alert SCO501CN-3ST Wireless Interconnected Combination Smoke and Carbon Monoxide.

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Battery operated smoke and carbon monoxide alarm can be installed easily.  Connects multiple alarms together for wireless safety network. Voice alarm gives clear indication of where the problem is located. Features photoelectric smoke sensor and electrochemical CO sensor. One button silences a false alarm and tests the unit. Loud 85 decibel alarm. Note. Kindly refer to the user manual provided as a PDF manual in the product description section. First Alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 (Based on a First Alert Brand Trust Survey in February 2018. Gases detected. Carbon Dioxide (CO2). Rating: 4.6 of 2,988 Ratings in Amazon.

5. Airthings 2930 Wave Plus - Radon & Air Quality Monitor.

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Award-Winning. Wave Plus is an award-winning smart indoor air quality monitor with radon detection. (Time magazine's Best Inventions 2019; CES Innovation Award - Honouree 2019). Reliable Radon Results. As radon levels fluctuate daily, continuous long-term measuring is necessary. Airthings Wave Plus measures radon accurately and reliably.  Clean Air Sensors. Radon, Carbon Dioxide (CO2), toxins and chemicals (Total VOCs), humidity, temperature and air pressure sensors allow you to gain full visibility into six key indoor air factors. Easy and Clear Results. Connect via Bluetooth to the Airthings App or log in to the Airthings Dashboard online for detailed insights into your air. Pollen Levels. Live and local pollen data right in your Airthings App. Easy. Simply wave in front of the device to receive a color-coded visual indication of the overall air quality: Green (Good), Yellow (Fair), Red (Poor). Smart Home Integration. Airthings Wave Plus works seamlessly with Alexa, Google Assistant and IFTTT (if this then that). Gases detected. Radon, Carbon Dioxide (CO2), toxins and chemicals (Total VOCs). Rating: 4.4 of 1,254 Ratings in Amazon.

6. Airthings 2950 Wave Radon.

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Radon Detector. Radon is the number one cause of lung cancer among non-smokers and kills more than 6x the number of people than home fires and carbon monoxide poisoning combined. Continuous Monitoring. Radon gas fluctuates daily and is highly dependent on many factors such as weather conditions. Long-term monitoring is crucial to take control, understand long-term exposure and minimize potential health effects. Easy to Use. Simply wave in front of the monitor to get a color-coded visual indication of the air quality (Green, Yellow, Red) or connect to the App to get detailed results. No Lab Fees. Get both long and short term radon results straight to your smartphone via Bluetooth and easily generate a radon report through the Airthings Dashboard. For Every Home. A battery-powered, smart radon detector which monitors radon gas all year round as well as humidity and temperature. Connected. Airthings Wave 2nd Generation has Smartlink functionality, meaning it can connect to the Airthings Hub to bring your data online 24/7. Gases detected. Radeon. Rating: 4.4 of 967 Ratings in Amazon.

7. First Alert Smoke Detector and Carbon Monoxide Detector.

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About safe and sound: First Alert introduces Onelink Safe and Sound, an Alexa enabled, Apple HomeKit compatible hardwired photoelectric smoke and electrochemical carbon monoxide alarm, featuring a state of the art, Omni directional speaker backed by First Alert’s unparalleled reliability and equipped with the power of Alexa. Easy mobile controls. Get remote notifications of an emergency in your home for 24/7 safety, plus track carbon monoxide levels, customize nightlights, and more, using First Alert's Onelink Home app. No more confusing beeps. Track battery levels in the app and optimize safety by knowing when it’s time to replace them. AirPlay 2 enables a wireless multi room audio system, creating an easy way to stream music anywhere in the home to different iOS and other AirPlay 2 compatible devices. Voice alerts. Key voice location technology annoz the type and location of the danger in your home, keeping your entire home safe and connected during an emergency. Safe & sound supports AirPlay 2 and requires iOS 12.2 or later or macOS 10.14.4 or later. To use AirPlay 2, update your devices to the latest software version and add your AirPlay 2-compatible speakers to the Home app on your iOS device. Easy to install. Optimal ceiling placement enhances the speaker’s acoustic quality; make installation fast and easy by using the included AC adapter plugs to replace your existing hardwire alarms without rewiring (AC power is required for Onelink Safe and Sound). Alexa enabled. You can talk to Alexa on your safe and sound, and ask it to play music or podcasts (from Music, Spotify, Pandora, and more), read audiobooks, fill you in on the news, check weather, control smart home devices, and more; plus Alexa’s always adding skills, so it gets smarter over time.  Interconnectivity. Unlike other smart combo alarms, safe and sound can connect with any other hardwired alarms in your home (including First Alert and non First Alert brands), and can send a mobile notification for any detected emergency, keeping your whole home safe and connected. Gases detected. Carbon Dioxide (CO2). Rating: 4.0 of 891 Ratings in Amazon.

8. X-Sense Wireless Interconnected Smoke Alarm Detector.

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Know from Anywhere. When one alarm is triggered, all interlinked smoke alarms will sound, so you and your family can hear the alarm from anywhere in your home; an intelligent locating function allows you to quickly locate the source of the fire, giving you every extra life-saving second to control the fire or evacuate. Wide Coverage for Full Home Protection. Featuring a relay function that extends transmission range, this radio-interlinked alarm can be interconnected with up to 24 smoke alarms to create a smart home network with no blind spots, even on different floors or in the basement and garage. Easy to Install, Interconnect, and Operate. This mini smoke alarm can be quickly installed onto any wall or ceiling without hardwiring; simply press the test/silence button to interconnect your wireless smoke alarms (the alarms in one multi-pack have already been interconnected); easy to test the alarm regularly or silence false alarms (e.g., cooking fumes) with a simple push. 5-Year Replaceable Battery & Self-Check. The battery supports 5-year continuous use and can be easily replaced by yourself; a low-battery warning lets you know when it’s time to replace the battery. Worry-Free After-Sales Services. All X-Sense smoke alarms come with a 60-day money-back guarantee, a 5-year warranty, and lifetime customer support with one working day; clear, easy-to-follow instructions are included for convenience; feel free to contact us if you have any questions. Rating: 4.6 of 854 Ratings in Amazon.

9. First Alert Onelink Smoke Detector and Carbon Monoxide Detector.

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Smoke + CO Detection. 2-in-1 smart smoke and carbon monoxide alarm alerts you to both types of danger in your home, with a photoelectric smoke sensor and electrochemical carbon monoxide sensor. Mobile + Voice Alerts. Alarm sends emergency notifications, via your phone, while voice alerts tell you the type and location of danger. A Home Safety Network + Alexa. Interconnects with other online devices (sold separately) to create a smart home safety network, so if one alarm sounds, all will; works with Amazon Alexa so you can ask Alexa to check the status of your Onelink alarm (Alexa device sold separately). Easy Battery Changes. Easy-access battery door, for simple battery changes; replaceable 5-year battery. Compatibility. Compatible with Apple HomeKit; can be used on both Apple and Android devices. Gases detected. Carbon Dioxide (CO2). Rating: 3.8 of 460 Ratings in Amazon.

10. X-Sense Wi-Fi Smoke Detector.

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Real-Time Reminders. You will receive a real-time notification on your smartphone whenever an alarm is triggered or any status is changed, making your life more convenient.  Silence Alarm Via APP. Allows you to temporarily silence any annoying alarms caused by kitchen fumes, smoking, etc. via the app; no more trying to push the silence button with a broomstick or with the help of a ladder, making it easier for the elderly and those with reduced mobility. Faster Response Time to Danger with Loud 85 DB Alarm. Upgraded photoelectric sensor significantly increases the alarm’s sensitivity for a faster response time while minimizing false alarms; 85 dB alarm is loud enough to alert all members in the household. Easy Installation. Simply install the smoke alarm onto the ceiling where you need it (refer to the section Installation Positioning in the user manual), connect the device to the app, and the device is ready to use. Self-Check Function. Continuously checks the battery status and Wi-Fi connection; if there is any problem with the self-check, you’ll receive a notification on your smartphone app immediately. Rating: 4.1 of 201 Ratings in Amazon.

11. Cazoner Natural Gas Detector and Propane Detector, Methane LPG Home Combustible Gas.

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Gas Detector for Home. Compact design for home used. High sensors to spot the presence of natural gases & liquefied petroleum gases leakages. A loud beeping & red flashing visual alerts you or your family when the levels unsafe (Alarm value setting: 7%LEL). It will effectively to protect your family & property safety. UL Certified. Medical grade polycarbonate material let it be flame-retardant, wear-resistant and anti-oxidation. The annual power consumption of J1 gas detector is ONLY about 2 kWh that meet the UL standard. It can operate well for at least 5 years.  Multi-Environments for Use. Suitable for motorhome, basement, rental house, residential house, boarding house, villas, hotels, markets, kitchen, etc., as long as AC110v power supply can be directly inserted.  Note. Please do not install this device outdoors, please clean and self-test it for every 6 months. Our Commitment. We offer a 100% satisfaction guarantee to each customer. If you will have any questions or unsatisfied with this product, please contact us for any assistance. Money back or replacement directly is available when you'll apply. You will feel no any pressure to shop from us. Gases detected. Methane, Propane, LNG, LPG. Rating: 4.1 of 168 Ratings in Amazon.

12. Ecosense Radon Gas Detector, EcoQube EQ100.

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First Result in Minutes. First radon level reading in just 10 minutes after power up; The advantage is that you can know your indoor radon levels in a short time.  An Accurate Radon Monitor for your Home. Radon counting sensitivity of 30 counts per hour per picocuries per liter enables an accurate measurement of indoor radon levels. WIFI Connected with Smartphone APP. Connects with your existing home Wi-Fi router and monitor your home’s radon levels from anywhere, anytime ; Results are delivered securely only to your smartphone app and alerts and share notifications if radon levels go above your comfort level. Compact Cube Design. Small enough to place anywhere within your home providing visual indication of radon levels using a color-coded LED on the front side. What You Get. EcoQube, User Guide, Power cable, Power adapter, customer support via email & 12 months limited warranty. Gases detected. Radeon. Rating: 4.5 of 139 Ratings in Amazon.

13. Seesii WIFI Natural Gas Detector.

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Newest WIFI Gas Leak Detector. This All-In-One detector detects the main deadly gases: 1. Natural gas (Methane, butane, ethane, LNG, etc.) and 2. Propane (LPG or liquefied petroleum gas). Reduce the risk of gas explosion and protect your family's life and property safety.  Sound / Light / Notification Alarm. 85db tonal alarm that notifies users at home of gas leaks and relative concentrations of natural gas. Get phone alert by Smart Life or Tuya APP in case no one at home. Three alarm ways, multiple protection for home and family. APP Remote Control Monitor. Supports checking gas sensor status and gas leaks or not via APP everywhere. No matter how far away from home, it can push you the alarm message to your phone no need hub. Smartphone remote control to make your home smarter. Digital LCD Display & Read Easily. This newly sensor is sleek and modern. Large screen LCD displays gas concentration and device status in real time, so that you feel much safer when know the exact gas concentration in the air of your home at all times. Easy to set up and operate, works perfect.  Protect your Family from Danger. Help you to be worry free and know you did everything to keep your family safe from accidents caused by dangerous gas leaks from your stove, furnace, water heater, washing machine, fireplace, kitchen, garage or grill. Low cost protection!. Gases detected. Methane, butane, ethane, LNG, LPG. Rating: 3.9 of 125 Ratings in Amazon.

14. Tuya Smart WiFi Combustible Gas Leak Detector,Smart Gas Leak Sensor.

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Detectable Gas. The natural gas leak detector detects the main deadly gases: Natural gas (Methane, butane, ethane, LNG, etc.) and Propane (LPG or liquefied petroleum gas). On-site Alarm and APP Remote Alarm. This gas alarm can be connected with mobile phone APP in a wireless environment. After connection, you can always receive the information of the alarm when you go out and once the alarm occurs. High Precision. The has an LCD screen that displays precise, real-time gas readings so that you know the exact gas concentration in the air of your home at all times. Installation Location. This propane alarm has an long 6 foot power cord which allows you to install it in the exact ideal location in your house to allow for proper gas detection. Screw fix or paste installation. Stylish Appearance. This newly released natural gas alarm is sleek and modern and has a beautiful blue LCD screen that will complement the style of your home or camper without detracting from your interior design. Gases detected. Methane, butane, ethane, LNG, LPG. Rating: NEW Ratings in Amazon.