Household Sensors & Alarms - Page 3 - Blowout Sale! Save up to 88%


Blowout Sale! Up to 88% off on Household Sensors & Alarms at Defy Now, Page 3. Top brands include First Alert, Ecolink, Marine Technologies, Universal Security Instruments, UHPPOTE, Alert Plus, Sabre, Sungwoo, TTMOW, Feeko, Safety Technology Intl, Kidde, Sobrovo, Ardwolf, COOWOO, & Yosoo. Hurry! Limited time offers. Offers valid only while supplies last.



First Alert SA320CN Dual-Sensor Smoke and Fire Alarm, Battery Powered- Frust Free
First Alert SA320CN Dual-Sensor Smoke and Fire Alarm, Battery Powered- Frust Free
By First Alert
In Stock
$59.99
$23.09
You Save: 62%

mpn: SA320CN, ean: 0029054015358,

4.1 out of 5 stars with 103 reviews
The First Alert SA320CN Dual-Sensor Smoke and Fire Alarm is an advanced smoke detector that uses ionization and photoelectric sensors to provide early warning of both smoldering and flaming fires. It also features intelligent sensing technology to reduce false alarms from household triggers like cooking smoke or shower steam. The battery-powered fire detector installs quickly and easily, with no wiring or electrician required. A loud 85-decibel siren is designed to alert even the soundest of


Z-Wave Plus Motion Detector, Easy to Install with PET Immunity, White (PIRZWAVE2.5-ECO)
Z-Wave Plus Motion Detector, Easy to Install with PET Immunity, White (PIRZWAVE2.5-ECO)
By Ecolink
In Stock
$42.27
$39.99
You Save: 5%

mpn: PIRZWAVE2.5-ECO, ean: 0851166005114,

4.4 out of 5 stars with 126 reviews
From the leaders in Z-wave plus technology, the Ecolink Motion Detector allows you to improve the safety and security of your home and family easily and effectively. Built with premium components for better performance, these motion sensors provide instant and reliable performance as part of your security system. Ecolink is a leading developer of low power, highly reliable wireless solutions, including a wide range of intelligent wireless security, sensing and home automation devices.


MTI Industries 65-542-P-WT Safe T Alert Carbon Monoxide Alarm - Flush Mount, White
MTI Industries 65-542-P-WT Safe T Alert Carbon Monoxide Alarm - Flush Mount, White
By Marine Technologies
In Stock
$66.91
$59.96
You Save: 10%

mpn: 0603.1086, ean: 0715456655420,

4.3 out of 5 stars with 116 reviews
The Safe T Alert Carbon Monoxide Alarm is designed for the rugged RV environment and is ideal for Class A motor homes, Class B van campers, Class C mini-motor homes, travel trailers, fifth wheels, trucks and folding campers. It features advanced technology with an ''Alarm Mute'' button that silences the alarm when the RV is ventilated and rapid recovery sensor that resets when silenced or reactivates if dangerous levels of CO remain. Easy 12 Volt installation means there will be no missing or


First Alert RD1 Radon Gas Test Kit
First Alert RD1 Radon Gas Test Kit
By First Alert
In Stock
$13.98
$13.80
You Save: 1%

mpn: RD1, ean: 6292753210599,

4.0 out of 5 stars with 102 reviews
The First Alert RD1 Radon Gas Test Kit detects dangerous radon gas in your home, work, or institution. Radon is a naturally occurring gas that can cause lung cancer, and can be found in basements, drains, crawl spaces, and other areas below ground. Simple, safe, and easy to use, this radon testing kit includes everything you need for an initial screening, including lab fees (except NJ state tests). The test is listed with the EPA and takes two to four days to complete in your home. Results are


USI Electric MIC1509S Hardwired 3-in-1 Universal Smoke Sensing & Carbon Monoxide Combination Alarm with 10-Year Sealed Battery Backup
USI Electric MIC1509S Hardwired 3-in-1 Universal Smoke Sensing & Carbon Monoxide Combination Alarm with 10-Year Sealed Battery Backup
By Universal Security Instruments
In Stock
$37.85
$32.90
You Save: 13%

mpn: MIC1509S, ean: 0042741315098,

4.5 out of 5 stars with 56 reviews
The USI Electric MIC1509S Hardwired 3-in-1 Universal Smoke Sensing & Carbon Monoxide Combination Alarm provides continuous protection against three deadly threats within the home. Newly patented Universal Smoke Sensing Technology offers the benefits of both photoelectric and ionization alarms in one device to protect against fast-flaming and slow-smoldering fires. This alarm also features protection against the silent killer - carbon monoxide - making it a 3-in-1 device. The ideal addition for


UHPPOTE Wired 12-24VDC Sound and Light Fire Alarm Warning Strobe Siren Horn Sound Alert Safety System Sensor
UHPPOTE Wired 12-24VDC Sound and Light Fire Alarm Warning Strobe Siren Horn Sound Alert Safety System Sensor
By UHPPOTE
In Stock
$15.90

mpn: XF104, ean: 0616010529457,

4.7 out of 5 stars with 106 reviews
Purpose: The Sound-light Fire Alarm apparatus are one kind terminal device for alarm, it is fit for the sound & light alarm when the fire happens. Trait: Selects two or the four-wire system wiring method, the main line end receives two main lines, not polarization, power source termination to DC24V power line. Technical Specifications:Non UL listed Temperature Range: -10℃~50℃ / 14℉~122℉ Humidity Range: ≤90%RH Operating Voltage: DC12-24V Working Current: 100-170mA Flash Intensity:


Carbon Monoxide Alarm Detector,with Digital LCD Display and Voice Warning - Battery powered
Carbon Monoxide Alarm Detector,with Digital LCD Display and Voice Warning - Battery powered
By Alert Plus
In Stock
$24.00
$17.88
You Save: 26%

mpn: AP-6987, ean: 0680168899502,

4.1 out of 5 stars with 67 reviews
Sound Alarm Warning: When a dangerous level of carbon monoxide is detected the red LED will flash and the alarm pattern will sound 85-decibel alarm to protectCarbon Monoxide Alarm Warning When a dangerous level of carbon monoxide is detected the red LED will flash and the alarm will Beep 85-decibel alarm. Unit Comes With with Batteries. Convenient and Energy Saving: Powered by 3 x 1.5V AA batteries, and the carbon monoxide detector will alarm when the power is low. Alarm Atanded: The alert time


SABRE Wireless Home Security Door Window Burglar Alarm with LOUD 120 dB Siren - DIY EASY to Install
SABRE Wireless Home Security Door Window Burglar Alarm with LOUD 120 dB Siren - DIY EASY to Install
By Sabre
In Stock
$15.99
$13.12
You Save: 18%

mpn: HS-DWA2, ean: 0023063809465,

4.8 out of 5 stars with 11 reviews
A burglary occurs every 14.5 seconds in the U.S., and budget cuts have led to an average 911 response time of 10 minutes. Now available in a two-pack for a greater value, the attention-grabbing Door or Window Alarm is 120 dB alarm and audible up to 750 feet (230 m) away. The user-friendly home security alarm comes with three adjustable settings: off, alarm and chime, which is ideal for alerting you when children or guests come and go while you’re at home. Featuring a consumer preferred


First Alert SCO500B Wireless Interconnected Photoelectric Smoke and Carbon Monoxide Combo Alarm with Voice and Location
First Alert SCO500B Wireless Interconnected Photoelectric Smoke and Carbon Monoxide Combo Alarm with Voice and Location
By First Alert
In Stock
$59.99
$40.89
You Save: 32%

mpn: SCO500B, ean: 0029054016324,

4.5 out of 5 stars with 149 reviews
The First Alert SCO500B Wireless Interconnected Photoelectric Smoke and Carbon Monoxide Combo Alarm with Voice and Location detects smoke and elevated carbon monoxide levels and can work with compatible models to create a wireless alert system throughout your home (additional alarms sold separately). For those who want a comprehensive detection system without hiring an electrician or worrying about hardwiring, this battery-operated CO smoke detector combo is an ideal solution. Wireless


Gas Leak Detector, Sungwoo Combustible Gas Detector, Natural Propane Methane Gas Leak Detector Sniffer with Audible & Visual Alarm Sensor Monitor for Home & Chemical Plant Safety (RED)
Gas Leak Detector, Sungwoo Combustible Gas Detector, Natural Propane Methane Gas Leak Detector Sniffer with Audible & Visual Alarm Sensor Monitor for Home & Chemical Plant Safety (RED)
By Sungwoo
In Stock
$27.99

ean: 0716253451727,

4.0 out of 5 stars with 33 reviews
Gas Leak Detector,Sungwoo Combustible Gas Detector Natural Gas Detector Propane Leak Detector with Audible and Visual Alarm Leak Detector for Home Safety Sungwoo type 8800A leak detector with visual leakage indicator can detect leakage, it can be used to detect : ①Hydrocarbon (methane, natural gas, ethane, propane, benzene, acetylene, pentane, hexane, gas oil, toluene) ②Halogenated hydrocarbon (methyl chloride, methylene chloride, vinyl chloride ③Alcohol (methanol, ethanol) It features


First Alert SCO501CN-3ST Battery Operated Combination Smoke and Carbon Monoxide Alarm with Voice Location
First Alert SCO501CN-3ST Battery Operated Combination Smoke and Carbon Monoxide Alarm with Voice Location
By First Alert
In Stock
$51.29

mpn: SCO500, ean: 6942469330639,

4.6 out of 5 stars with 126 reviews
The First Alert SCO501CN-3ST Combination Smoke and Carbon Monoxide Alarm with Voice Location detects both smoke and carbon monoxide in a single device. Designed for those who want a comprehensive detection system without hiring an electrician, this battery-operated smoke and carbon monoxide detector is an ideal solution. This technology interconnects the detector with other compatible First Alert wireless-enabled alarms in your home to create a wireless safety network. This allows them to


TTMOW Natural Gas Alarm Combustible Gas Leak Detector High Sensitivity with Sound Warning for Your Home Safety,Prevent Fire Explosion Device
TTMOW Natural Gas Alarm Combustible Gas Leak Detector High Sensitivity with Sound Warning for Your Home Safety,Prevent Fire Explosion Device
By TTMOW
In Stock
$87.99
$27.99
You Save: 68%

ean: 0712243066360,

4.0 out of 5 stars with 54 reviews
TTMOW Natural Gas Alarm Combustible Gas Leak Detector High Sensitivity with Sound Warning for Your Home Safety,Prevent Fire Explosion Device★Prevent Fire,Protect Your Family safety - All the time detect the flammable gases, accuracy and timely warning before danger.. Combustible gas alarm are used for detecting flammable gases: Natural Gas, Liquefied Gas, Gas etc.. Warning gas concentration value:Natural Gas 10~25% LEL ,Liquefied Gas 10~25% LEL ,Gas 2~5% LEL.When flammable gas concentration


Wireless HoDoor Window Burglar Safety Security Alarm System Magnetic Sensor Pack 10
Wireless HoDoor Window Burglar Safety Security Alarm System Magnetic Sensor Pack 10
By Feeko
In Stock
$12.99

mpn: 702455998856, ean: 0702455998856,

4.2 out of 5 stars with 53 reviews
Features:  New and high quality  Super loud 90 dB alarm Convenience in installation--just peel and stick  Super environmental suitability and stability  Dustproof and insect prevention  Easily mounted by adhesive.  Type to window or door.  Ideal entry warning for homes, apartments, mobile homes, do rms, offices, hotel rooms, garages, and more!  Magnetic sensor switch detects entry protecting your home or office whether you are in or out  Warning door / window sticker is supplied free


Safety Technology International, Inc. STI-6402 105 dB Exit Stopper Multifunction Door Alarm for Double Doors with on/off Switch and 9 Volt Battery
Safety Technology International, Inc. STI-6402 105 dB Exit Stopper Multifunction Door Alarm for Double Doors with on/off Switch and 9 Volt Battery
By Safety Technology Intl
SKU: #VEN12-SF-6402
In Stock
$99.99
$86.97
You Save: 13%

sku: VEN12-SF-6402, mpn: 6402, ean: 0662950640202,

4.7 out of 5 stars with 86 reviews
Safety Technology International, Inc. STI-6402 Exit Stopper Multifunction Door Alarm for Double Doors - Highly effective, alarm alerts to any unauthorized exits/entries through emergency exit doors and rear doors. Serves as an inexpensive security device and helps stop theft as well. If the protected door is opened, the electronic exit stopper for double doors emits a 95/105 ear piercing alarm for 30 seconds, three minutes or continuously. A key operated override will silence the alarm and


Kidde 21006406 KN-COB-IC Hardwire Carbon Monoxide Alarm with Battery Backup, Interconnectable
Kidde 21006406 KN-COB-IC Hardwire Carbon Monoxide Alarm with Battery Backup, Interconnectable
By Kidde
In Stock
$59.99
$28.98
You Save: 52%

mpn: 21006406, ean: 0047871001200,

4.6 out of 5 stars with 33 reviews
The Kidde 900-0120 Is An Ac Wire-In Carbon Monoxide Alarm That Warns You And Your Family Of Dangerous Carbon Monoxide Levels. It Includes Multiple Contractor Friendly Features To Ensure Easy Installation And Minimal Troubleshooting. This Alarm Interconnects With Up To 24 Kidde Devices (Of Which 18 Can Be Initiation) Including Smoke Alarms, Co Alarms And Heat Alarms On One Wiring Network. The 900-0120 Includes A 9V Battery Backup Along With A 5-Year Limited Warranty. Battery Pull Tab Made in:


Smoke Alarms, Photoelectric Smoke Detector and Fire Alarm with Light Sound Warning 9V Battery (Included) Powered Fire Safety for Home Hotel School etc Passed UL Certification
Smoke Alarms, Photoelectric Smoke Detector and Fire Alarm with Light Sound Warning 9V Battery (Included) Powered Fire Safety for Home Hotel School etc Passed UL Certification
By Sobrovo
In Stock
$99.99
$11.99
You Save: 88%

mpn: Sobrovo, ean: 0761330002576,

4.1 out of 5 stars with 43 reviews
Feature: ★ This unit is a photoelectric smoke alarm. The photoelectric technology ,it is more sensitive in detecting slow  smoldering fires which generate light smoke, little heat and may smolder for hours before bursting into flames. ★ This smoke alarm dose not contain any radioactive material.Smoke alarms should be installed in every room (except the bathroom and kitchen),finished attics and basements, making sure the people in the home will be able to hear and respond to the alarm


Smoke Detector, Ardwolf 2 Pack Photoelectric Smoke Fire Alarm UL Listed GS528A Battery-Powered (9V Battery Included),10 Years Life Time, Save Lives When Fire Happen at Home, Hotel, School
Smoke Detector, Ardwolf 2 Pack Photoelectric Smoke Fire Alarm UL Listed GS528A Battery-Powered (9V Battery Included),10 Years Life Time, Save Lives When Fire Happen at Home, Hotel, School
By Ardwolf
In Stock
$21.99

mpn: GS528A2pack, ean: 6761342270394,

4.1 out of 5 stars with 129 reviews
Photoelectric Technology: Ardwolf smoke alarms with photoelectric technology which is optimized to detect slow smoldering fires which generate light smoke, little heat and may smolder for hours before bursting into flames.. Battery-Powered: This Fire detector is powered by one 9V battery(included), it will not be affected by power outage. When an intermittent ''chirp'' accompanied by a red LED flash every 32 seconds indicates a low battery.. 10 Years Life Time: UL Listed Battery-Powered, low


2 Pack Photoelectric Smoke Detector & Alarm, Battery-Operated(Not Hardwired) Smoke and Fire Alarm/Detector with Test Button, Photoelectric Fire Dector/Alarm with UL Listed(9V Battery Included)
2 Pack Photoelectric Smoke Detector & Alarm, Battery-Operated(Not Hardwired) Smoke and Fire Alarm/Detector with Test Button, Photoelectric Fire Dector/Alarm with UL Listed(9V Battery Included)
By COOWOO
In Stock
$49.99
$21.99
You Save: 56%

mpn: YG-02,

4.5 out of 5 stars with 98 reviews
Complete Home ProtectionWorking smoke alarms cut the risk of dying in a home fire by 50%, and that's important because a home fire starts every 83 seconds! The faster you know about a fire, the faster you can start moving your family outside. The COOWOO smoke alarm with test button allows you to test the unit's functionality. It features a low battery alert to remind you when to change the battery and has a missing battery guard to ensure that a battery is placed inside the alarm. The side


Yosoo Gas Leakage Detector Family Safety Alarm for US Plug
Yosoo Gas Leakage Detector Family Safety Alarm for US Plug
By Yosoo
In Stock
$22.59
$22.36
You Save: 1%

mpn: Yosoo, ean: 0736691323691,

4.4 out of 5 stars with 100 reviews
Features:--It is suitable for detecting LPG, natural gas, and coal gas at home kitchen, hotel or restaurant, etc. --Designed with MCU intelligent supervise control and SMT chip technology. --The LED numeric display technology can display instant gas leak concentration ,and give visual &audible alarm. --The gas leakage detector adopts high-quality semiconductor calefaction type sensor, which can provide good performance. --Intelligent protection of family safety. --Three indicators: POWER,



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