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Review of Kidde i9040 Fire Sentry Battery-Operated Ionization Sensor Compact Smoke and Fire Alarm
4.30 stars Very Good Form 121 Reviews
Reviewed on: July 07, 2013 Author:
Price Range


Pros & Cons


  • Easy to install and mount
  • Ionization sensing single station smoke alarm
  • Battery operated, no wires needed
  • Includes 9 volts battery
  • Test button to check functionality of the alarm unit
  • Compact and clean looking
  • Affordable price with easy to use features


  • Non-dual sensor alarm
  • Test button is very loud
Review Summary

This is the summary of consumer reviews for Kidde i9040 Fire Sentry Battery-Operated Ionization Sensor Compact Smoke and Fire Alarm. The BoolPool rating for this product is Very Good, with 4.30 stars, and the price range is $3.99-$8.75.

Kidde i9040 Fire Sentry is battery operated single station smoke alarm that utilizes ionization sensing technology. This compact unit is 4 inch in diameter, giving it a discreet design and clean looks. It is powered by a 9 volts battery and installs quickly without wires. This easy to install unit 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 is time to replace the battery. This unit is UL Listed and includes a shelf life of 10 years and a 3 years limited warranty. 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.

The i9040 is not a dual sensor fire alarm and its test button is very loud.

Overall, the Kidde i9040 Fire Sentry is a highly recommended basic alarm system for its easy to use features and affordable price. 

User Voice
Kidde i9040 Fire Sentry Battery-Operated Ionization Sensor Compact Smoke and Fire Alarm
Priced right Compact Single function alarm Easy to mount Perfect even for business places Inconspicuous Trusted brand
Review Group #: 1 Rating :
4.50 stars
10 Reviews See Details
Very easy installation Good design and clean looking Sensitive and loud Cheap price
Review Group #: 2 Rating :
4.50 stars
11 Reviews See Details
Shelf life of 10 years Not a dual sensor device Compact Affordable price Stylish Easy to clean
Review Group #: 3 Rating :
4.50 stars
13 Reviews See Details
Good battery life Battery installation is easy 9 volt battery included Advisable to frequently replace batteries Always press the test button to check after new installation
Review Group #: 4 Rating :
4.50 stars
15 Reviews See Details
Mounts easily Works perfect Compact looks Good brand and works as advertised
Review Group #: 5 Rating :
4.00 stars
16 Reviews See Details
Inexpensive Installation is quick and easy Compact and well designed
Review Group #: 6 Rating :
5.00 stars
25 Reviews See Details
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Rating : 4.30Very Good
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