Household Sensors & Alarms - Blowout Sale! Save up to 57%


Blowout Sale! Up to 57% off on Household Sensors & Alarms at Defy Now. Top brands include MSA (Mine Safety Appliances Co), Kidde, First Alert, 3M, Simplex, Alert Pro, MTI, vodool, & Baldwin Meadows. Hurry! Limited time offers. Offers valid only while supplies last.



MSA (Mine Safety Appliances) 10107602 Altair 4X Portable Combustible Gas, Oxygen, Hydrogen Sulfide and Carbon Monoxide Monitor with Motion Alert
MSA (Mine Safety Appliances) 10107602 Altair 4X Portable Combustible Gas, Oxygen, Hydrogen Sulfide and Carbon Monoxide Monitor with Motion Alert
By MSA (Mine Safety Appliances Co)
In Stock
$669.00

mpn: 10107602, ean: 0816687000000,

4.0 out of 5 stars with 113 reviews
Fend all Flash Flood utilizes sealed cartridges that contain one gallon of preserved and pH balanced Spherion Saline solution. The Fend all Flash Flood delivery system offers immediate, hands-free eye flushing, and is portable to meet the needs of changing work-place hazards. Removing the pull strap easily activates the system, while dual nozzles provide flushing to both eyes simultaneously. When activated, Fend all Flash Flood delivers saline solution for three minutes.MSA ALTAIRÂ 4X Portable


Kidde AC Hardwired Interconnect Smoke Alarm with Hush I12040
Kidde AC Hardwired Interconnect Smoke Alarm with Hush I12040
By Kidde
In Stock
$13.73
$10.30
You Save: 25%

mpn: i12040, ean: 0047871260492,

4.4 out of 5 stars with 54 reviews
The Kidde i12040A is an AC/DC powered, ionization smoke alarm that operates on a 120V power source with 9V battery backup. This alarm uses ionization sensing technology. Ionization sensing alarms may detect invisible fire particles (associated with flaming fires) sooner than photoelectric alarms. Photoelectric sensing alarms may detect visible particles (associated with smoldering fires) sooner than ionization alarms. Kidde strongly recommends that both ionization and photoelectric smoke alarms


Kidde i12060 Hardwired Smoke Alarm with Front Load Battery Backup Smoke Alarm
Kidde i12060 Hardwired Smoke Alarm with Front Load Battery Backup Smoke Alarm
By Kidde
In Stock
$12.77

mpn: 21026054, ean: 0047871260546,

4.4 out of 5 stars with 121 reviews
This smoke alarm responds well to fast-raging fires. It emits an 85dB horn and red LED. It also features a test/reset button to test alarm circuitry, alarm activation, and battery function. It can also interface with other Kidde interconnectable alarms. Meets UL, NFPA, FHA, HUD, CSFM standards Smoke Alarm, Detection Method Ionization, Up to 24 Units Interconnection Capability, Power Source 120VAC, 9V, Audible Alert 85dB @ 10 ft., Horn, Visual Alert Red LED, Diameter 5 In., Height 1-3/4 In.,


First Alert SA305CN Smoke Alarm with Long Life Lithium Battery
First Alert SA305CN Smoke Alarm with Long Life Lithium Battery
By First Alert
In Stock
$28.99
$12.79
You Save: 56%

mpn: FBA_SA305CN3, ean: 0111012200002,

4.5 out of 5 stars with 80 reviews
With silence and test alarm functions button and low battery warning. Front battery drawer slides open for battery replacement, resists closing unless battery is installed. Blinking power indicator confirms unit is receiving power. Loud 85-decibel alarm. UL listed. Working 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 First


Kidde i12010S Hardwired Smoke Alarm
Kidde i12010S Hardwired Smoke Alarm
By Kidde
In Stock
$33.00
$25.83
You Save: 22%

mpn: 21010408, ean: 0047871265145,

4.9 out of 5 stars with 106 reviews
The Kidde i12010S is an AC/DC powered, ionization smoke alarm that operates on a 120V power source with sealed-in lithium battery backup. This alarm uses ionization sensing technology. Ionization sensing alarms may detect invisible fire particles(associated with flaming fires) sooner than photoelectric alarms. Photoelectric sensing alarms may detect visible particles (associated with smoldering fires) sooner than ionization alarms. Leading authorities recommend that both ionization and


3M LeadCheck Swabs, 8-Pack
3M LeadCheck Swabs, 8-Pack
By 3M
In Stock
$22.85
$21.00
You Save: 8%

mpn: 717834209102DUPE, ean: 0717834205135,

4.9 out of 5 stars with 25 reviews
3M(TM) LeadCheck(TM) Swabs are EPA recognized, non-toxic and provide a rapid, test for lead on most surfaces. When lead is detected, 3M(TM) LeadCheck(TM) Swabs turn red on contact. The vast majority of test situations results are obtained in less than 30 seconds. Simple to use: just crush, shake and swab. Red Means Lead(TM). Each kit contains test confirmation cards to verify individual test results. 3M(TM) LeadCheck(TM) Swabs provide instant lead-detection results for quick and accurate job


Kidde RF-SM-DC Wireless Interconnect Battery-Operated Smoke Alarm
Kidde RF-SM-DC Wireless Interconnect Battery-Operated Smoke Alarm
By Kidde
In Stock
$38.18
$27.78
You Save: 27%

mpn: RF-SM-DC, ean: 0047871260447,

4.4 out of 5 stars with 117 reviews
Kidde RF-SM-DC Wireless Interconnect Battery-Operated Smoke Alarm What's in the Box One 0919-9999 smoke alarm with mounting bracket and mounting hardware, 3- AA batteries, a 10-year limited warranty and a bilingual user's manual. The Kidde 0919-9999 Battery-Operated Wireless Smoke Alarm allows for the easy installation of an interconnected smoke alarm system without the high cost and hassle of rewiring your home. The alarms are wirelessly linked so that when one alarm is triggered, all alarms


Kidde i12040 120V AC Wire-In Smoke Alarm with Battery Backup and Smart Hush
Kidde i12040 120V AC Wire-In Smoke Alarm with Battery Backup and Smart Hush
By Kidde
In Stock
$22.99
$10.00
You Save: 57%

mpn: 21006378, ean: 7147905930940,

4.7 out of 5 stars with 119 reviews
The Kidde i12040A is an AC/DC powered, ionization smoke alarm that operates on a 120V power source with 9V battery backup. This alarm uses ionization sensing technology. Ionization sensing alarms may detect invisible fire particles (associated with flaming fires) sooner than photoelectric alarms. Photoelectric sensing alarms may detect visible particles (associated with smoldering fires) sooner than ionization alarms. Kidde strongly recommends that both ionization and photoelectric smoke alarms


Firex Hardwired Smoke Alarm I4618
Firex Hardwired Smoke Alarm I4618
By Kidde
In Stock
$25.00

mpn: 21026063, ean: 0716080045281,

4.2 out of 5 stars with 54 reviews
The Kidde i4618 is an AC/DC powered, ionization smoke alarm that operates on a 120V power source with 9V battery backup. This alarm uses ionization sensing technology. Ionization sensing alarms may detect invisible fire particles (associated with flaming fires) sooner than photoelectric alarms. Photoelectric sensing alarms may detect visible particles (associated with smoldering fires) sooner than ionization alarms. The front-loading battery door allows user to change the battery without


First Alert BRK 7010B Hardwire Smoke Alarm with Photoelectric Sensor and Battery Backup
First Alert BRK 7010B Hardwire Smoke Alarm with Photoelectric Sensor and Battery Backup
By First Alert
In Stock
$19.48
$19.40

mpn: GID-601061, ean: 0746211141193,

4.6 out of 5 stars with 106 reviews
The First Alert BRK 7010B hardwire photoelectric smoke alarm with battery backup is a hardwire 120V single or multiple station smoke alarm designed for residential home use and institutional locations such as hospitals, hotels, motels, dormitories and other multiple family dwellings. This alarm is inter-connectable and can be installed and linked with up to 18 compatible devices (up to 12 smoke alarms and 6 compatible devices like bells, horns and repeaters) so that when one triggers, all


SIMPLEX 4098-9714 AUTOMATIC FIRE SMOKE DETECTOR SAFETY AND SECURITY B475304
SIMPLEX 4098-9714 AUTOMATIC FIRE SMOKE DETECTOR SAFETY AND SECURITY B475304
By Simplex
In Stock
$45.50

mpn: B475304-4098-9714, ean: 0056674517009,

4.0 out of 5 stars with 8 reviews
Smoke Detector Head, For use with a Simplex UL Listed Base, Also Suitable for Special ApplicationSKU: B475304 (PCO).


Worry-Free Combination Smoke & Carbon Monoxide Alarm with Lithium Battery P3010CU
Worry-Free Combination Smoke & Carbon Monoxide Alarm with Lithium Battery P3010CU
By Kidde
In Stock
$80.42
$39.84
You Save: 50%

mpn: 21026065, ean: 0047871260652,

4.6 out of 5 stars with 77 reviews
The Kidde P3010CU is a 10-year, sealed battery, smoke and carbon monoxide alarm with a voice warning system that features photoelectric and electrochemical sensing technology with Smart Hush feature. This combination alarm combines the detection capabilities of a photoelectric sensor with that of an electrochemical sensor, which is used to detect CO. When either sensor notices a potential hazard, it will communicate with the other. Depending on what is detected, the alarm will adjust its smoke


10 Year Battery Smoke Detector Fire Alarm with Photoelectric Sensor
10 Year Battery Smoke Detector Fire Alarm with Photoelectric Sensor
By Alert Pro
In Stock
$16.48

mpn: AP-989, ean: 0750408332707,

4.1 out of 5 stars with 18 reviews
10-YEAR BATTERY SMOKE DETECTOR ALARM : A sealed CR123A lithium battery boasts high capacity, great stability, and a long lifespan up to 10 years, avoiding the hassle of frequently changing battery SUPERIOR ALARM PERFORMANCE: Proven performance for detecting smoke from hidden and slow-burning fires; photoelectric sensor can also detect dangerous fast-burning fires that can cause extreme damages; powerful 85 dB alarm tone will sound through your entire home and instantly alert those in danger


First Alert SA511CN2-3ST Interconnected Wireless Smoke Alarm with Voice Location, Battery Operated, Pack of Two
First Alert SA511CN2-3ST Interconnected Wireless Smoke Alarm with Voice Location, Battery Operated, Pack of Two
By First Alert
In Stock
$72.89
$57.47
You Save: 21%

mpn: SA511CN2-3ST, ean: 0783961354817,

4.6 out of 5 stars with 10 reviews
The First Alert SA511CN2-3ST Interconnected Wireless Smoke Alarm with Voice Location features an 85-decibel siren and voice alarm that tells you where the danger is located. A photoelectric sensor detects smoke while minimizing false alarms from cooking or shower steam. Interconnected smoke detectors in different locations are designed to work together, with one alarm triggering the other alarm during a fire, helping to provide the earliest warning for your family.Interconnected alarms all


Kidde i4618 Firex Hardwire Ionization Smoke Detector with Battery Backup (6 Pack)
Kidde i4618 Firex Hardwire Ionization Smoke Detector with Battery Backup (6 Pack)
By Kidde
In Stock
$55.44
$52.83
You Save: 5%

mpn: i4618-6,

4.3 out of 5 stars with 69 reviews
The Firex i4618 Hardwire Smoke Alarm by Kidde is an ionization smoke alarm that operates on a 120V power source with 9V battery backup. The Firex i4618 smoke alarm offers many benefits for installers and homeowners, such as its easy-access slide load front battery door. This alarm is powered by your home's electricity and will interconnect with other smoke alarms in your home. Experts recommend interconnected alarms, because when one sounds, they all sound, providing an early warning against


MTI Industries 30-442-P-WT Propane Gas Alarm – White
MTI Industries 30-442-P-WT Propane Gas Alarm – White
By MTI
In Stock
$53.42
$50.50
You Save: 5%

mpn: 0603.1089, ean: 0715456404301,

4.3 out of 5 stars with 33 reviews
The Safe T Alert 30 Series Propane/LP Gas 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 propane remain. Easy 12 Volt installation means there will be


2 Pack Smoke Detector, Photoelectric Sensor Fire and Smoke Alarm with 9V Battery Operated, Silence Test Button, Light Sound Warning, UL Listed, 10 Years Life Time
2 Pack Smoke Detector, Photoelectric Sensor Fire and Smoke Alarm with 9V Battery Operated, Silence Test Button, Light Sound Warning, UL Listed, 10 Years Life Time
By vodool
In Stock
$39.99
$21.99
You Save: 45%
4.5 out of 5 stars with 43 reviews
''Thousands of people die each year as a result of either house fires or wildfires, with direct property loss estimated at $8.6 billion annually!'' HOW SHOCKING THE TRUTH IS! Home fire starts every 83 seconds!That's why we need a smoke alarm?sensor smoke alarm to kill the fire at the begining. IT'S IMPORTANT TO CHOOSE OUR ALARMS FOR YOUR HOME SAFETY Smoke is harmful to human health and can cause choking or limit visibility hindering evacuation.Smoke alarm sensors are set off when smoke


First Alert CO910  10-Year Carbon Monoxide Alarm, White
First Alert CO910 10-Year Carbon Monoxide Alarm, White
By First Alert
In Stock
$39.99
$24.98
You Save: 38%

mpn: CO910, ean: 0029054012241,

4.4 out of 5 stars with 143 reviews
The First Alert CO910 Carbon Monoxide Alarm with 10-Year Battery is designed to provide you with a decade of uninterrupted carbon monoxide monitoring. This carbon monoxide detector uses an electrochemical carbon monoxide sensor, the most accurate CO detection technology available, to detect the CO you can't see, smell, or taste in the air. A built-in 10-year lithium ion battery provides continuous protection for the lifetime of the alarm, with no need to ever worry about changing batteries.


Drinking Water Test Kit 9 in 1 - Best Water Quality Test for Well Water and Tap Water - Determines pH - Lead - Total Hardness - Copper - Alkalinity & More - 100 Ct - Accurate Results in Seconds!
Drinking Water Test Kit 9 in 1 - Best Water Quality Test for Well Water and Tap Water - Determines pH - Lead - Total Hardness - Copper - Alkalinity & More - 100 Ct - Accurate Results in Seconds!
By Baldwin Meadows
In Stock
$19.99

mpn: 9 Parameter, ean: 0866555000403,

4.3 out of 5 stars with 109 reviews
Baldwin Meadows has developed a way to test the water with an easy to use at-home water analysis test kit. Our 9-in-1 water testing strips help determine the quality of your water using the following parameters: Total Alkalinity pH Total Hardness Iron Copper Lead Nitrite Nitrate Free Chlorine What is in your drinking water? According to the EPA, 41 states have reported higher than acceptable levels of lead in drinking water. A 2016 Harvard study found industrial chemicals and pollutants


Smoke Detector, Photoelectric Sensor Smoke Alarm, 10 Years Safety Hardwired Fire Alarm with 9V Back up Battery, Red Flash Alarm and Green AC Power Indicator, Interconnect up to 12pcs
Smoke Detector, Photoelectric Sensor Smoke Alarm, 10 Years Safety Hardwired Fire Alarm with 9V Back up Battery, Red Flash Alarm and Green AC Power Indicator, Interconnect up to 12pcs
By vodool
In Stock
$39.99
$21.99
You Save: 45%
4.6 out of 5 stars with 127 reviews
''Thousands of people die each year as a result of either house fires or wildfires, with direct property loss estimated at $8.6 billion annually!'' HOW SHOCKING THE TRUTH IS! Home fire starts every 83 seconds!That's why we need a smoke alarm?sensor smoke alarm to kill the fire at the begining. IT'S IMPORTANT TO CHOOSE OUR ALARMS FOR YOUR HOME SAFETY Smoke is harmful to human health and can cause choking or limit visibility hindering evacuation.Smoke alarm sensors are set off when smoke



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