To see product details, add this item to your cart. You can always remove it later.
Added to

Sorry, there was a problem.

There was an error retrieving your Wish Lists. Please try again.

Sorry, there was a problem.

List unavailable.

Kidde Fire Sentry Smoke Detector, 9V Battery Powered Smoke Alarm, 4 Inch Compact Design

4.6 4.6 out of 5 stars 6,474 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Smoke Detectors & Fire Alarms by Kidde

To see product details, add this item to your cart. You can always remove it later.

Purchase options and add-ons


About this item

  • At only 4-inches in diameter, this is one of the smallest smoke detectors you can install in your home, RV, and mobile home
  • Basic ionization smoke alarm, affordable and simple to use to provide detection of dangerous smoke or fire
  • Operating on a 9-volt alkaline battery, the Kidde smoke alarm provides reliable detection of smoke or fire, even during power outages
  • Easy installation – this basic smoke detector requires no wiring
  • An 85-decibel alarm sounds & a red LED indicates the smoke detector is sensing smoke or fire
  • Test-Hush button makes it easy to test the smoke detector and silence false alarms that occur from cooking or shower steam
  • UL listed with a 3-year limited manufacturer warranty on alarm only (not a battery performance claim). Warranty begins when the alarm is powered on. If that date is unknown, it should be assumed that replacement is needed.
See more product details

Customer ratings by feature

Noise level
5.0 5.0
Easy to install
4.5 4.5
Durability
4.4 4.4
Accuracy
4.4 4.4

Frequently bought together

$6.94
Get it as soon as Sunday, Mar 24
In Stock
Ships from and sold by Amazon.com.
+
$17.82
Get it as soon as Sunday, Mar 24
In Stock
Ships from and sold by Amazon.com.
+
$12.59
Get it as soon as Sunday, Mar 24
In Stock
Sold by FDUIOSPF and ships from Amazon Fulfillment.
Total price:
To see our price, add these items to your cart.
Details
Added to Cart
These items are shipped from and sold by different sellers.
Choose items to buy together.

Compare with similar items

This Item
Kidde Fire Sentry Smoke Detector, 9V Battery Powered Smoke Alarm, 4 Inch Compact Design
Kidde Fire Sentry Smoke Detector, 9V Battery Powered Smoke Alarm, 4 Inch Compact Design
Recommendations
SITERLINK Smoke Detectors Battery Operated, Smoke Alarm with Test-Silence Button, Photoelectric Sensor Fire Alarms Smoke Detectors with LED Lights, UL Listed Fire Alarm for House, GS528A, 1 Pack
dummy
Ecoey Smoke Detector Fire Alarm with Photoelectric Technology, Fire Detector with Test Button and Low Battery Signal, Fire Alarm for Bedroom and Home, FJ136GB, 1 Pack Small
dummy
Jemay Smoke Detector, Smoke Alarm with Advanced Photoelectric Technology, Smoke Detector with Test Button and Low Battery Reminder, Fire Alarm with Battery Backup Used in Home, AW106, 1 Pack
dummy
X-Sense Smoke Detector, 10-Year Battery Smoke Fire Alarm with Photoelectric Sensor, LED Indicator & Silence Button, 1-Pack
dummy
Jemay Fire Alarm Battery Operated, Smoke Alarm with Enhanced Photoelectric Sensor, Mini Smoke Detector Fire Alarm with LED Indicator & Silence Button
Details
Added to Cart
Details
Added to Cart
Details
Added to Cart
Details
Added to Cart
Details
Added to Cart
Details
Added to Cart
Price-31% $6.94
List:$9.99
$13.99$11.99$10.99$18.95$11.99
Delivery
Get it as soon as Sunday, Mar 24
Get it as soon as Sunday, Mar 24
Get it as soon as Sunday, Mar 24
Get it as soon as Sunday, Mar 24
Get it as soon as Sunday, Mar 24
Get it as soon as Sunday, Mar 24
Customer Ratings
Easy to install
4.5
4.4
4.4
4.5
4.6
4.5
Value for money
4.2
3.8
3.9
4.0
4.3
4.0
Battery life
3.8
3.8
4.0
4.3
4.4
4.3
Adhesion
4.1
4.1
4.2
4.2
Sold By
Amazon.com
Siterlink
Ecoey-direct
Jemay-US
X-Sense US
Jemay-US
power source
Battery Powered
Battery Powered
Battery Powered
Battery Powered
Battery Powered
Battery Powered
sensor type
Ionization
Photoelectric
Photoelectric
Photoelectric
Photoelectric
Photoelectric
style
Battery Powered Smoke Detector
9V Replaceable Battery
Not Hardwired
1-Year Battery(GS506)
Standalone Model SD2L0AX
1-Year Battery
alarm
fire safety, ionization, battery powered
Audible
Visual
Audible
Audible
Visual

From the manufacturer

Kidde Fire Sentry Smoke Detector, Battery Powered, Smoke Alarm
Kidde Fire Sentry Smoke Detector, Battery Powered, Smoke Alarm
Kidde Fire Sentry Smoke Detector, Battery Powered, Smoke Alarm

Product information

Technical Details

Additional Information

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.

Feedback

Kidde Fire Sentry Smoke Detector, 9V Battery Powered Smoke Alarm, 4 Inch Compact Design


Found a lower price? Let us know. Although we can't match every price reported, we'll use your feedback to ensure that our prices remain competitive.

Where did you see a lower price?

URL:
Price: ($)
Shipping cost: ($)
Date of the price:
/
/

Store name:
City:
State:
Price: ($)
Date of the price:
/
/


Please sign in to provide feedback.

Looking for specific info?

Product guides and documents

Product Description

Product Description

The Kidde Fire Sentry Smoke Detector, 9V Battery Powered Smoke Alarm, 4 Inch Compact Design, model i9040, is a smaller designed, 4-inch diameter smoke detector that you can install in tight spaces in your home, your RV, or mobile home. The Kidde Smoke Detector uses ionization sensor technology to detect invisible fire particles (associated with flaming fires) sooner than photoelectric alarms. When smoke or fire is detected, an 85-decibel alarm will sound. The Kidde Smoke Detector is powered by a 9-volt battery, which provides easy installation since the alarm requires no wiring, plus coverage during a power failure. A red LED indicates that the smoke detector is sensing smoke or fire. A test-hush button allows you to test the battery operations as well as silence nuisance alarms that may occur from cooking or shower steam. The Kidde Smoke Detector will chirp when it's time to replace the battery. Install a smoke detector & carbon monoxide detector on every level of your home and near bedrooms to help keep your family safe from fire & poisonous gas. UL Certified with a 3-year limited manufacturer's warranty. Meets requirements of UL 217, NFPA72 (chapter 11 2002 edition), NFPA101 (One and two-family dwellings), and Federal Housing Authority (FHA).

Amazon.com

Designed to help protect you and your family from the dangers of smoke and fire, the Kidde i9040 Fire Sentry Compact Smoke and Fire Alarm, Ionization Sensor is a compact, battery-operated unit that provides continuous protection, even during power outages. UL-listed, it uses ionization technology to detect smoke and fires as soon as they start, providing both extra escape time and peace of mind. callout top i9040 Fire Sentry Compact Smoke and Fire Alarm At a Glance: Battery-operated alarm offers continual operation, even during power outages Protects your family in case of a home fire Uses ionization technology to detect even invisible fire particles Includes 9-volt battery Three-year limited warranty callout top i9040 Fire Sentry Compact Smoke and Fire Alarm Each alarm provides a range of user-friendly features for easy operation and maintenance. View larger. i9040 Fire Sentry Compact Smoke and Fire Alarm Use the test button to check the alarm's circuitry, horn, and battery function. View larger. Smoke Alarms Prevent Home Fire Deaths Every year, 70 percent of all home fire deaths occur in homes with no alarms or no working alarms, while nearly one quarter of smoke alarms in reported fires are not working. Installing smoke alarms like the i9040 in your home can provide reliable protection in case of fire. And because the i9040 offers several user-friendly features, you'll always know when it's working properly, and when the batteries need to be replaced. Compact Unit Provides Protection Against Home Fires Measuring just four inches in diameter, the i9040 is smaller and more discrete than traditional smoke alarms, which makes it an ideal choice for smaller spaces or for blending in with your decor. It installs quickly without wires, and includes a test button that allows you to periodically check the circuitry, horn, and battery function. Also, a chirping sound makes it clear when it's time to replace the battery. Ionization Sensor Technology To ensure early detection of fires, the i9040 use ionization sensing technology Ionization sensing alarms may detect invisible fire particles (associated with fast flaming fires) sooner than photoelectric alarms. Photoelectric sensing alarms may detect visible fire particles (associated with slow smoldering fires) sooner than ionization alarms. Kidde strongly recommends that both ionization and photoelectric smoke alarms be installed to help insure maximum detection of the various types of fires that can occur within the home. Compliancy and Warranty Information The i9040 alarm is UL listed and is backed by a three-year limited warranty. About Kidde: A UTC Fire and Security Brand Renowned for global leadership in fire detection and suppression, Kidde provides solutions ranging from portable fire extinguishers to advanced industrial controls such as flame detection and explosion suppression systems. Kidde is a UTC Fire and Security brand, with a history that's rich with innovations, from the patent of the Chubb Detector Lock in 1818 to the development of the world's first wireless networked smoke detectors in 2004. What's in the Box Kidde i9040 Smoke and Fire Alarm, 9-volt battery, mounting hardware, and installation guide. i9040 Fire Sentry Compact Smoke and Fire Alarm Keep your family safe by placing alarms and extinguishers in each area of the house, and by having a fire escape plan. Click here for a detailed image.

Important information

Bulb Voltage

9 volts

To report an issue with this product or seller, click here.

Customer reviews

4.6 out of 5 stars
4.6 out of 5
6,474 global ratings

Customers say

Customers like the performance, value, and ease of installation of the smoke detector. They mention that it works great, has no complaints, and is a great product for the price. Customers are also happy with ease of setup, and quality. However, some customers have different opinions on battery, smoke, noise, and size.

AI-generated from the text of customer reviews

215 customers mention201 positive14 negative

Customers appreciate the value of the smoke detector. They mention that it does what they need at a cheap price and lasts a while. Some customers also say that it is a great smoke detector for the price.

"This is a great smoke detector for the price, but as others have stated in their reviews, smoke detectors have a recommended 10 year life span, and..." Read more

"Great price and even comes with a battery." Read more

"...Very inexpensive for what it is and trust me when I say I've bought too many of these that they almost seem disposable...." Read more

"Great price and fast shipping. This is smaller than I thought but it was set up quickly. It hasn't gone off yet so I hope it works." Read more

192 customers mention158 positive34 negative

Customers like the performance of the gas smoke fire alarm. They mention that it works great, has no problems, and functions correctly. Some say that the product is small and perfect.

"This are tested and work...." Read more

"They came with batteries as stated was easy to install and work properly." Read more

"Nice and loud. Works well. Had to replace the battery out of the box as the one it came wh came dead. But still a great smoke alarm" Read more

"Nice compact size for locating it in the bedroom. Works as advertised." Read more

167 customers mention164 positive3 negative

Customers find the installation process of the gas smoke fire alarm to be easy. They mention that the battery is included, the installation is solid, and operation and testing was easy. Some customers also say that the product is a perfect fit for their RV and comes with all the necessary parts needed to install.

"They came with batteries as stated was easy to install and work properly." Read more

"I liked how easy it was to install test and make sure that it worked properly...." Read more

"...Have about 7 in each unit. Seem to work and very easy to install" Read more

"...Nice size, neutral color, easy to install, a must in every household." Read more

134 customers mention95 positive39 negative

Customers like the quality of the smoke detector. They say it's a decent product, easy to install, and well-made. Some say that it' s an excellent buy for Kidde, a respected brand. Overall, most are happy with their purchase and recommend it to others.

"Great buy! Plus it includes the battery." Read more

"...But it is durable feeling and installs solid and easy. As far as I can tell it is just as good as the typical sized smoke detectors...." Read more

"...have a maximum lifespan of 10 years, this one already has 20% less life than it should...." Read more

"...detectors, we felt this was the best value for our money and trustworthy brand." Read more

82 customers mention51 positive31 negative

Customers are mixed about the size of the product. Some mention that it isn't that noticeable on walls, fits nicely in many locations, and is a good compact detector, while others say that it's really small and too small to cover the electrical junction box.

"Nice compact size for locating it in the bedroom. Works as advertised." Read more

"I am upset that I am not allowed to return, because it is to small. I need a 5 inch, instead of a 4 inch." Read more

"I like that it is a small o size. Very sensitive" Read more

"...Nice size, neutral color, easy to install, a must in every household." Read more

78 customers mention45 positive33 negative

Customers are mixed about the battery of the smoke detector. Some mention that it is really nice comes with battery and hardware to mount them, while others say that the included battery was dead on arrival.

"Great buy! Plus it includes the battery." Read more

"One battery was bad" Read more

"Great price and even comes with a battery." Read more

"...They can be gifted to persons in need. They even include batteries which saves a lot of money. Overall, an excellent buy for Kidde, a respected brand." Read more

77 customers mention31 positive46 negative

Customers are mixed about the noise of the gas smoke fire alarm. Some mention that it works wonderful and is loud, while others say that it started chirping upon inserting the battery it was shipped with and that it is loud af when it goes off.

"...something started to burn directly underneath it this 'smoke alarm' NEVER MADE A SOUND...." Read more

"Nice and loud. Works well. Had to replace the battery out of the box as the one it came wh came dead. But still a great smoke alarm" Read more

"...Also, after installation the detector kept chirping. I removed the battery and it it read 8.5 Volts. A new battery fixed the chirping problem...." Read more

"Works wonderful and its loud." Read more

47 customers mention26 positive21 negative

Customers have mixed opinions about the smoke detector. Some say it's a great product and very simple smoke alarm. It's sensitive enough to quickly detect smoke, but it' s not overly sensitive. Some customers say that it immediately detected that little bit of smoke, while others say that the smoke was like mini smoke detectors.

"...But still a great smoke alarm" Read more

"...It just keeps going off over and over again, detecting the smoke right away...." Read more

"Basic smoke detector, hopefully will never need it. The included 9v batteries are dead on arrival for the two I ordered, battery expiration 11/23." Read more

"...They are mini smoke detectors and will not fit regular fittings." Read more

Exelente
5 Stars
Exelente
Todo 👍
Thank you for your feedback
Sorry, there was an error
Sorry we couldn't load the review

Top reviews from the United States

Reviewed in the United States on February 26, 2024
Reviewed in the United States on March 3, 2024
One person found this helpful
Report
Reviewed in the United States on December 17, 2023
2 people found this helpful
Report
Reviewed in the United States on November 13, 2023
One person found this helpful
Report
Reviewed in the United States on February 19, 2024
One person found this helpful
Report
Reviewed in the United States on February 7, 2024
One person found this helpful
Report
Reviewed in the United States on February 21, 2024
One person found this helpful
Report
Reviewed in the United States on February 11, 2024

Top reviews from other countries

martin
5.0 out of 5 stars good
Reviewed in India on November 23, 2020
One person found this helpful
Report
KAMAL
2.0 out of 5 stars Only works on heavy smoke
Reviewed in India on October 5, 2020
7 people found this helpful
Report
Ishita
1.0 out of 5 stars There is no alarm! It just gives three soft beeps! No one outside the room can hear!
Reviewed in India on February 24, 2021
2 people found this helpful
Report
Kamal
1.0 out of 5 stars Not working after a month
Reviewed in India on November 5, 2020
2 people found this helpful
Report