Best Alarm Detector In May 2025

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Here, we’ll review the top 10 Best Alarm Detector on the market today. We’ll provide an overview of the pros and cons of each product. Read on for our selection of Best Alarm Detector.

To help you in your search, we have completed this list of the Best Alarm Detector.

Top Rated Best Alarm Detector Of 2025

Rank	Product Name	Score
1	Kidde Carbon Monoxide Detector Alarm |Battery Operated | Model # KN-COB-LP2 9CO5-LP2 Buy Now	9.7 Buy Now
2	First Alert ZCOMBO 2-in-1 Smoke Detector & Carbon Monoxide Alarm, Z-Wave Combo Buy Now	9.5 Buy Now
3	Kidde 00760 - 120 volt Digital Display Plug-In Carbon Monoxide Alarm with Battery Buy Now	9.1 Buy Now
4	Kidde 21026043 Battery-Operated(Not Hardwired) Combination Smoke/Carbon Monoxide Alarm with Voice Warning KN-COSM-BA Buy Now	8.8 Buy Now
5	Kidde AC Plug-in Carbon Monoxide and Explosive Gas Detector Alarm | Nighthawk Sensor Buy Now	8.6 Buy Now
6	First Alert Smoke Detector and Carbon Monoxide Detector Alarm | Battery Operated, SCO5CN Buy Now	8.3 Buy Now
7	Govee Water Detectors, Wireless Water Leak Detector with 100 DB Loud Alarm, Water Buy Now	8.1 Buy Now
8	Kidde KN-Copp-B-LPM Monoxide Alarm, KN-Copp-B-LPM Buy Now	7.8 Buy Now
9	All-new Ring Alarm Motion Detector (2nd Gen) Buy Now	7.5 Buy Now
10	Kidde Safety - 21026055 Kidde Sealed Lithium Battery Power Smoke Detector Alarm | Buy Now	7.2 Buy Now

1. Kidde Carbon Monoxide Detector Alarm |Battery Operated | Model # KN-COB-LP2 9CO5-LP2

• Loud 85 decibel alarm
• Event memory
• 2 aa battery backup
• Low battery hush
• Low battery signal

2. First Alert ZCOMBO 2-in-1 Smoke Detector & Carbon Monoxide Alarm, Z-Wave Combo

• 7 year limited warranty, meets ul217 & ul2034 standards
• Help keep your family safe with this battery powered smoke and carbon monoxide detector alarm
• Certified to work with smart home systems such as ring alarm security system, samsung smart things, and nexia home intelligence when connected to a z wave gateway hub (sold separately, consult hub manufacturer to ensure compatibility with this first alert device), 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
• Unit uses wireless z wave technology to send mobile alerts if the alarm goes off, so you are aware whether you're at home or away

3. Kidde 00760 - 120 volt Digital Display Plug-In Carbon Monoxide Alarm with Battery

• Power source: 120vac. temperature range-40f (4.4c) to 100f (37.8c). humidity range-5%-95% relative humidity (rh)
• Test button functions tests the unit for proper operation and resets the carbon monoxide alarm
• Led operation blinking dot in lower right corner of display denotes normal operation
• Ten years after the initial power up, this alarm will beep two times every 30 seconds to indicate that it is time to replace the alarm.
• Peak level button displays the peak co level recorded by the alarm since it was last reset or unplugged
• Note: this co alarm is not battery operated. however, these alarms are equipped with 9 volt battery backup the 9 volt battery is to supply short term back-up during a power outage.

4. Kidde 21026043 Battery-Operated(Not Hardwired) Combination Smoke/Carbon Monoxide Alarm with Voice

• Voice announcements - hush feature temporarily silences nuisance alarms with hush mode activated and hush mode cancelled voice announcement. 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.temperature range:40f (4.4c) to 100f ...
• Combined carbon monoxide and smoke alarm a single unit can be installed where previously, two were needed. reduces installation time and helps to keep home dcor attractive.
• Battery - provides protection even during power outages when many fire and carbon monoxide incidents occur. the unit warns of a low battery condition by announcing low battery and by initiating an alarm chirp and activating a flashing red led. the battery door will not close unless the batteries are properly installed. note : the date printed on the item is manufact...
• Audio alarm: 85 db at 10 feet. test/reset button and leds tests alarm circuitry and triggers the voice announcement. flashing green for normal operation and flashing red for alarm condition. humidity range: 10 percent to 95 percent relative humidity non-condensing
• Voice alarm announces the hazard type detected thereby helping to speed up the correct reaction to the hazard detected. alarm announces fire! when a smoke or fire hazard is detected and announces warning carbon monoxide when a co hazard is detected

5. Kidde AC Plug-in Carbon Monoxide and Explosive Gas Detector Alarm | Nighthawk Sensor

• Kiddes carbon monoxide alarms meet the requirements of underwriters laboratories (ul), an independent facility that tests products for compliance with widely-accepted safety standards
• Peak level memory - recalls the highest co concentration detected
• Protects you and your family from two deadly threats: carbon monoxide and explosive gas.
• Digital display and peak level button displays the peak co level recorded by the alarm since it was last reset
• Two alarms in one detects carbon monoxide and explosive gas
• Sounder alarm the kn-coeg-3 offers a loud 85-decibel pulsing alarm that will sound to alert you to a potential problem.

6. First Alert Smoke Detector and Carbon Monoxide Detector Alarm | Battery Operated, SCO5CN

• 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
• Features an electrochemical carbon monoxide sensing technology as well as a photoelectric sensor that detects the larger particles of a smoldering fire
• 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
• Battery operated unit installs quickly and easily without an electrician. low battery signal mute, quiets low battery signal for upto 8 hours
• 7 year limited warranty, equipped with end of life signal chirp, so you know when its time to replace the unit for safety, all first alert alarms are rigorously tested to meet ul standards
• 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)

7. Govee Water Detectors, Wireless Water Leak Detector with 100 DB Loud Alarm, Water

• Low battery alert and waterproof: the water sensor alarm will beep and flash red light when battery is low, or press the button on it to test the battery level, and the complete sealed waterproof structure ensure its long lifespan in moisture situation
• Loud alarm audio: each water leak detector features an ultra-loud 100 db alarm audio. loud enough to be heard even if leak happens in basement, press the button to mute the sound when you find the leaking place
• Dripping and leaking alarm: besides 2 groups of back water detectors probes, our product has one group front probe for water pipe dripping, simply place it in bathrooms, basements, kitchen, underneath sinks or by water heaters to detect water leaks before they cause costly water damage
• Wireless and easy to use: no wire or setup required, the mini size allow you to put it on any place that the dripping and leaking could happen. if you have purchased our water leak detector kit, you can add it to the kit, then when you are not at home, you will also be able to monitor your home's leaks on your phone. search "b07qp153gt" to find water leak detector kit o...
• Your purchase protected: govee provide 30 days money back guarantee & 1 year replacement warranty & life support guarantee unconditionally (battery replacement not included). purchase one to take care of you family and property without any risk

8. Kidde KN-Copp-B-LPM Monoxide Alarm, KN-Copp-B-LPM

• Battery operated - provides best protection during power outages. battery safeguard makes it difficult to close the cover without batteries in the unit. low battery signal alerts user when the batteries need to be replaced. slide-out battery door cover gives immediate access to batteries
• Digital display - displays the level of carbon monoxide the unit is sensing. shows co level in ppm (parts per million). updates digital reading every 15 seconds allowing you to see if levels change. peak level memory displays the highest co concentration measured since the last reset
• Led's - green led for normal operation, red led for alarm. temperature range 40f (4.4c) to 100f (37.8c).sensor: electrochemical
• Test/reset button - tests units electronic circuitry & horn and resets the unit during alarm. tests co alarm circuit operation and allows you to immediately silence the alarm
• Provides peace of mind against the silent killer and a digital display

9. All-new Ring Alarm Motion Detector (2nd Gen)

• Requires the ring alarm base station
• Mounts to room corners and flat walls
• Now smaller to enable increased placement options
• Easy installation with no tools required
• Uses two aa batteries
• Get instant mobile alerts when motion is detected

10. Kidde Safety - 21026055 Kidde Sealed Lithium Battery Power Smoke Detector Alarm |

• Kidde?s smoke alarms meet the requirements of underwriters laboratories (ul), an independent facility that tests products for compliance with widely-accepted safety standards
• Smart hush temporarily silences nuisance alarms and will not allow hush mode to be activated unless the unit is in alarm mode
• Sealed in lithium battery never replace battery over the ten-year life of the alarm
• 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
• Sealed-in lithium battery sealed-in lithium power supply, no battery replacement required over the 10 year life of the alarm. eliminates worry about battery removal or unauthorized deactivation of alarm
• 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