Top 10 Dual sensor Smoke Detector Battery Operated – Smoke Detectors & Fire Alarms
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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.

Features an electrochemical carbon monoxide sensing technology as well as a photoelectric sensor that detects the larger particles of a smoldering fire.
Battery operated unit installs quickly and easily without an electrician. Keep your family safe with this battery operated smoke and carbon monoxide alarm; Battery powered alarms provide continuous monitoring of CO levels, even if there's a power failure. Simple to use, with a single test/silence button; EZ access battery drawer allows you to change battery without removing alarm from ceiling. Low battery signal mute, quiets low battery signal for up to 8 hours.

Practical lcd display: clearly indicates real-time carbon monoxide co concentration in the surrounding air, the screen will be backlit blue, as well as the remaining battery life and working status of the alarm; if a CO concentration of 30-999 ppm exists for a certain time period, and the LED indicator will flash red 4 times every 5.8
Simple to use: test/silence button enables you to test the alarm weekly, an alarm tone of over 85 dB will sound throughout your entire home, and to easily silence the alarm when false alarms occur; malfunction and low battery warnings allow you to easily know the working status of the alarm; in case of an emergency, instantly alerting the entire household, even those in sleep.


5 seconds and the red led flashes with the alarm sound; CO alarm: delivers 4 quick beeps every 5.
3. Simple to use: the test/silence button of this smoke alarm carbon monoxide alarm enables you to test the alarm weekly, an alarm tone of over 85 dB will instantly alert the entire household, and to easily silence the alarm when false alarms occur; malfunction and low battery warnings allow you to easily know the working status of the alarm; in case of an emergency, even those in sleep.4. Alarm types for more convenient: different alarm patterns of this carbon monoxide detector and smoke alarm tell you it is either smoke or carbon monoxide is detected without checking the LCD display; smoke alarm: delivers 3 long beeps every 1. 8 seconds and the red LED flashes with the alarm sound.

8˚c. If the alarm had detected a co level of 100ppm or higher, the unit will announce “Carbon Monoxide Previously Detected” to warn of the CO incident, when the Test/ Reset button is pressed. Audio alarm: 85 db at 10 feet. Combined carbon monoxide and smoke alarm – A single unit can be installed where previously, two were needed.
Alarm announces “fire” when a smoke or fire hazard is detected and announces “Warning Carbon Monoxide” when a CO hazard is detected. Voice announcements - hush feature temporarily silences nuisance alarms with “hush mode activated” and “hush mode cancelled” voice announcement. Reduces installation time and helps to keep home décor attractive. Note: the date printed on the item is manufacturing date, not the expiration date.

Emits T3 Pattern. Equipped with a dual photoelectric and ionization smoke sensor to quickly detect both fast burning and smoldering fires. Two latching features help indicate a low battery or the originating alarm in a system. Photoelectric and ionization sensors provide comprehensive fire detection.

Complies with all current 10-year legislation in U. S. Alarm features an ionization sensor for smoke detection, which is effective in recognizing smoke from flaming fires such as paper and grease fires.
10-year limited Warranty. To ensure complete protection make sure to place one on each level of your home and in each bedroom. Same features as sa340cn and SA340B but adds Sealed Battery Technology. Alarm also features loud 85-decibel alarm, easy mounting bracket, a single test/silence button, and an end-of-life signal so you know when to replace the unit.

Self-activation – alarm automatically activates when attached to the mounting bracket, HushTM – Will temporarily silence nuisance alarms and will not allow hush mode to be activated unless the unit is in alarm mode.
Eliminates worry about battery removal or unauthorized deactivation of alarm. Sealed-in lithium battery never replace battery over the ten-year life of the alarm. Test/reset button – tests unit’s circuit operation and resets memory after an alarm condition occurs, LED – A flashing red indicator light with four modes of operation: Standby, alarm mode, hush mode, and memory set. Kidde's smoke alarms meet the requirements of Underwriters Laboratories UL, an independent facility that tests products for compliance with widely-accepted safety standards.

1. FIRST ALERT
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Frustration-Free Packaging, First Alert Dual-Sensor Smoke and Fire Alarm, Battery Powered, SA320CN
#adFIRST ALERT #ad - To ensure complete protection make sure to place one on each level of your home and in each bedroom. Help keep your family safe with this battery operated smoke alarm; It requires no rewiring for installation and provides continuous monitoring even if there's a power failure.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.
More information #ad
Equipped with both a photoelectric and ionization sensor to quickly detect both fast burning, and smoldering fires. Loud 85 decibel siren sounds to alert you to danger. Single test/silence button lets you easily check alarm function and mute false alarms; Use Polaroid AA batteries for best results.Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 2 Inches |
Length | 5 Inches |
Weight | 0 Pounds |
Width | 5 Inches |
Part Number | SA320CN |
Model | SA320FF |
Warranty | 10 Year Limited |
More information #ad
2. FIRST ALERT
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SCO5CN, First Alert Smoke Detector and Carbon Monoxide Detector Alarm | Battery Operated
#adFIRST ALERT #ad - Indicator lights on the face of the unit display the presence of smoke or carbon monoxide, while an 85 decibel siren provides a clear, loud warning upon detection. It can ship within the US except New York. 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.Features an electrochemical carbon monoxide sensing technology as well as a photoelectric sensor that detects the larger particles of a smoldering fire.
More information #ad
7 year limited warranty; equipped with end of life signal chirp, so you know when it’s time to replace the unit for safety; All first alert alarms are rigorously tested to meet UL standards. Battery operated unit installs quickly and easily without an electrician. Keep your family safe with this battery operated smoke and carbon monoxide alarm; Battery powered alarms provide continuous monitoring of CO levels, even if there's a power failure. Simple to use, with a single test/silence button; EZ access battery drawer allows you to change battery without removing alarm from ceiling. Low battery signal mute, quiets low battery signal for up to 8 hours.
Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 5 Inches |
Length | 2 Inches |
Weight | 0.6 Pounds |
Width | 5 Inches |
Part Number | SCO5CN |
Model | SCO5CN |
Warranty | ------- |
More information #ad
3. X-Sense
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X-Sense 10 Year Battery Not Hardwired Smoke and Carbon Monoxide Detector with LCD Display, SC01, Dual Sensor Smoke CO Alarm Complies with UL 217 & UL 2034 Standards, Auto-Check
#adX-Sense #ad - Quick & easy installation with guaranteed quality: requires no rewiring; easy to mount on any wall or ceiling with the included mounting bracket, screws and anchor plugs; certified to meet the UL 217 & UL 2034 safety standards for your peace of mind and absolute confidence in our product. 10-year battery & 10-year sensor: this smoke and carbon monoxide alarm provides 10 years of continuous power with a built-in lithium battery, saving on energy while remaining eco-friendly; saves you from constantly having to change batteries; an end-of-life signal will let you know when it's time to replace the unit for safety.Practical lcd display: clearly indicates real-time carbon monoxide co concentration in the surrounding air, the screen will be backlit blue, as well as the remaining battery life and working status of the alarm; if a CO concentration of 30-999 ppm exists for a certain time period, and the LED indicator will flash red 4 times every 5.8
More information #ad
8 seconds. 2-in-1 accurate, reliable & highly sensitive alarm: equipped with both photoelectric smoke sensor and electrochemical CO sensor that work independently of each other; every second counts; detects both fast and slow-burning fires, and instantly notifies you when dangerous smoke or CO concentration is detected while minimizing false alarms; provides the ultimate protection from 2 deadly threats, all contained in 1 unit. Simple to use: test/silence button enables you to test the alarm weekly, an alarm tone of over 85 dB will sound throughout your entire home, and to easily silence the alarm when false alarms occur; malfunction and low battery warnings allow you to easily know the working status of the alarm; in case of an emergency, instantly alerting the entire household, even those in sleep.
Brand | X-Sense #ad |
Manufacturer | X-Sense #ad |
Height | 2.5 Inches |
Length | 6.45 Inches |
Width | 6.14 Inches |
Part Number | SC01-1-5 |
Model | SC01 |
More information #ad
4. FIRST ALERT
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First Alert FAT1039828 Dual-Sensor Smoke & Fire Alarm
#adFIRST ALERT #ad - 2 sensors detect smoke From Both Smoldering & Flaming Fires. Single test/silence Button For Simple Operation. Engineered to reduce False Alarms From Cooking Smoke Or Steam. Loud 85db alarm is Designed To Be Heard Easily. Battery-powered fire Detector Installs Anywhere With No Wiring Required.More information #ad
Brand | FIRST ALERT #ad |
Manufacturer | First Alert / BRK Brands, Inc. #ad |
Height | 8.5 Inches |
Length | 7 Inches |
Weight | 0.6 Pounds |
Width | 2.5 Inches |
Part Number | 1039828 |
Model | FAT1039828 |
Warranty | 10 years |
More information #ad
5. X-Sense
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SC03, X-Sense 10-Year Battery Not Hardwired Combination Smoke and Carbon Monoxide Detector Alarm, Auto-Check, Dual Sensor Smoke CO Alarm Complies with UL 217 & UL 2034 Standards
#adX-Sense #ad - 2. 5. 1. Easy installation with quality: x-sense smoke carbon monoxide detector combo requires no rewiring; easy to mount on any wall or ceiling without an electrician; all X-SENSE carbon monoxide detector and smoke alarm are rigorously tested to meet UL 217 and UL 2034 safety standards; comes with a lifetime customer support. High accuracy and sensitivity: x-sense carbon monoxide fire alarm is equipped with combination photoelectric smoke and electrochemical CO sensors that work independently of each other; instantly notifies you when dangerous smoke or CO concentration is detected; provides the ultimate protection from 2 deadly threats, all contained in 1 unit.5 seconds and the red led flashes with the alarm sound; CO alarm: delivers 4 quick beeps every 5.
More information #ad
10-year battery life: this combination smoke detector and carbon monoxide detector alarm provides 10 years of continuous power with a built-in lithium battery; provides continuous monitoring of smoke and CO levels, even if there's a power failure; an end-of-life signal will let you know when it’s time to replace the unit for safety. 3. Simple to use: the test/silence button of this smoke alarm carbon monoxide alarm enables you to test the alarm weekly, an alarm tone of over 85 dB will instantly alert the entire household, and to easily silence the alarm when false alarms occur; malfunction and low battery warnings allow you to easily know the working status of the alarm; in case of an emergency, even those in sleep.4. Alarm types for more convenient: different alarm patterns of this carbon monoxide detector and smoke alarm tell you it is either smoke or carbon monoxide is detected without checking the LCD display; smoke alarm: delivers 3 long beeps every 1. 8 seconds and the red LED flashes with the alarm sound.
Brand | X-Sense #ad |
Manufacturer | X-Sense #ad |
Height | 2.5 Inches |
Length | 5.7 Inches |
Weight | 0 Pounds |
Width | 5.7 Inches |
Part Number | SC03 |
Model | SC03 |
More information #ad
6. Kidde
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Kidde 21026043 Battery-OperatedNot Hardwired Combination Smoke/Carbon Monoxide Alarm with Voice Warning KN-COSM-BA
#adKidde #ad - Refer to the pDF attached below in technical specification for manual. Voltage volts: 4. 5. Humidity range: 10 percent to 95 percent relative humidity non-condensing. Flashing green for normal operation and flashing red for alarm condition. Temperature range: 40˚F 4.8˚c. If the alarm had detected a co level of 100ppm or higher, the unit will announce “Carbon Monoxide Previously Detected” to warn of the CO incident, when the Test/ Reset button is pressed. Audio alarm: 85 db at 10 feet. Combined carbon monoxide and smoke alarm – A single unit can be installed where previously, two were needed.
More information #ad
Voice alarm – announces the hazard type detected thereby helping to speed up the correct reaction to the hazard detected. 4˚c to 100˚f 37. The unit warns of a low battery condition by announcing “low battery” and by initiating an alarm chirp and activating a flashing red LED. Alarm announces “fire” when a smoke or fire hazard is detected and announces “Warning Carbon Monoxide” when a CO hazard is detected. Voice announcements - hush feature temporarily silences nuisance alarms with “hush mode activated” and “hush mode cancelled” voice announcement. Reduces installation time and helps to keep home décor attractive. Note: the date printed on the item is manufacturing date, not the expiration date.
Brand | Kidde #ad |
Manufacturer | Kidde Safety #ad |
Height | 5.6 Inches |
Length | 1.8 Inches |
Weight | 1 Pounds |
Width | 5.6 Inches |
Part Number | 21026043 |
Model | 21026043 |
Warranty | 5-year limited warranty |
More information #ad
7. FIRST ALERT
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First Alert BRK 3120B Hardwired Smoke Detector with Photoelectric Sensor and Ionized Alarm with Battery Backup
#adFIRST ALERT #ad - Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety. A single button makes alarm easy to test monthly or silence during a false alarm.Emits T3 Pattern. Equipped with a dual photoelectric and ionization smoke sensor to quickly detect both fast burning and smoldering fires. Two latching features help indicate a low battery or the originating alarm in a system. Photoelectric and ionization sensors provide comprehensive fire detection.
More information #ad
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. Hardwired alarm includes battery backup for power outages. Temperature range:40°f 4°c to 100°F 38°C. Optipath 360 patented technology provides 360 degrees of access to the smoke alarm.Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 2.4 Inches |
Length | 5.7 Inches |
Weight | 0.9 Pounds |
Width | 5.7 Inches |
Part Number | 3120FF |
Model | 3120FF |
Warranty | 10 Year Limited |
More information #ad
8. FIRST ALERT
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0827B, First Alert 10-Year Ionization sensor Smoke Alarm, White
#adFIRST ALERT #ad - Ionization Sensor. 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. Perfect mount allows for easy alignment of alarm.Complies with all current 10-year legislation in U. S. Alarm features an ionization sensor for smoke detection, which is effective in recognizing smoke from flaming fires such as paper and grease fires.
More information #ad
Complies with all current 10-year legislation in states/cities where required. States/cities where required. No battery changes for the Life of the Alarm; 3V Lithium Power Cell Included. Battery-operated unit provides continuous monitoring even if there's a power failure: plus, it's easy to install. 10-year limited Warranty. To ensure complete protection make sure to place one on each level of your home and in each bedroom. Same features as sa340cn and SA340B but adds Sealed Battery Technology. Alarm also features loud 85-decibel alarm, easy mounting bracket, a single test/silence button, and an end-of-life signal so you know when to replace the unit.
Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 5.6 Inches |
Length | 5.6 Inches |
Weight | 0.01 Pounds |
Width | 2 Inches |
Part Number | FBA_0827B |
Model | 0827B |
Warranty | ------- |
More information #ad
9. Kidde
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Kidde Sealed Lithium Battery Power Smoke Detector Alarm | Model i9010
#adKidde #ad - End of life warning – alarm chirps every 40-45 seconds indicating the alarm is in need of replacement, tamper resist – when activated upon installation effective in preventing someone from removing the unit from the mounting bracket. Smart hush temporarily silences nuisance alarms and will not allow hush mode to be activated unless the unit is in alarm mode.Self-activation – alarm automatically activates when attached to the mounting bracket, HushTM – Will temporarily silence nuisance alarms and will not allow hush mode to be activated unless the unit is in alarm mode.
More information #ad
Temperature Range-40˚F 4. 4˚c to 100˚f 37. 8˚c. Sealed-in lithium battery – sealed-in lithium power supply; No battery replacement required over the 10 year life of the alarm. Alarm memory – rapidly flashing led alerts user if the alarm has sounded since the last time the test/reset button was used. Eliminates worry about battery removal or unauthorized deactivation of alarm. Sealed-in lithium battery never replace battery over the ten-year life of the alarm. Test/reset button – tests unit’s circuit operation and resets memory after an alarm condition occurs, LED – A flashing red indicator light with four modes of operation: Standby, alarm mode, hush mode, and memory set. Kidde's smoke alarms meet the requirements of Underwriters Laboratories UL, an independent facility that tests products for compliance with widely-accepted safety standards.
Brand | Kidde #ad |
Manufacturer | Kidde Safety #ad |
Height | 5.6 Inches |
Length | 1.55 Inches |
Width | 5.6 Inches |
Part Number | 442007 |
Model | 21026055 |
Warranty | 10-year limited warranty |
More information #ad
10. Kidde
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21026051 Smoke Detector Alarm | Battery Operated | Model # i9050, Kidde
#adKidde #ad - Test button – Verifies battery and alarm operation. Easy installation – No wiring required. Battery operated 9v battery included – Provides continuous protection even during power failures.More information #ad
Flashing led – Indicates alarm is receiving power. Low battery indicator – Chirps when battery needs replacement.Brand | Kidde #ad |
Manufacturer | Kidde #ad |
Height | 1 Inches |
Length | 2 Inches |
Weight | 0.62 Pounds |
Width | 1 Inches |
Part Number | 21026051 |
Model | 21026051 |
More information #ad