Smoke Detector Dimensions: First Alert SA302CN
The unit is 5.7 x 5.7 x 2.8 inches. The alarm makes use of ionization and also photoelectric sensors. The latter technology is used for sensing various types of smoldering flames. These types include burns caused by cigars. The ionization is more adept at detecting fires that erupt quickly.
The alarm comes with an 85 dB alarm. The smart dual sensor built in reduces incidents of false alarms. The SA302CN meets the UL standards. It can be muted with virtually any remote control device and uses a 9 v battery. When replacing the battery, there is no need to take off the alarm from the ceiling.
Smoke Detector Dimensions: Kidde PI9000
The unit measures 5.75 inches in diameter and 1.8 inches deep. The device comes with ionization sensors to shield against quick emerging fires. The photoelectric sensor is for slower fires. The Kidde PI9000 also comes with the Hush feature. What this feature does is to desensitize the alarm for 7 minutes. When this option is set on, the unit will chirp every half a minute.
The PI9000 uses a 9 volt battery. It also comes with a red LED light. This blinks every half a minute to indicate that it is running. There is also a reset button so you can test the system anytime.
Smoke Detector Dimensions: Kidde KN-COSM-IB
The KN-COSM-IB measures 5.75 inches in diameter and is 1.7” deep. The main feature of the unit is its voice warning system. This feature will inform you specifically if the cause for alarm is fire, carbon monoxide etc.
The voice warning system will also notify you verbally if the battery needs to be replaced or if it’s set to hush mode. In case of fire, the LED light will come on. There will be 3 alarms and the voice warning “Fire!”
For carbon monoxide, the alarm will go off four times followed by the voice warning. The alarm comes with a 9 volt battery backup, helpful during power outages.
Smoke Detector Dimensions: 914 Fire Sentry
The 914 Fire Sentry alarm measures 4.1 x 4 x 1.5”. It comes with a 9 v battery and a test button. The test button can be used to verify the working status of the electronics and the battery as well.
The 4 inch diameter makes the device compact and so doesn’t take up a lot of space (and is discreet). There is also a low battery indicator and it comes with a three year warranty.
Tips and Warnings
To make sure that the smoke detector works, you should follow the installation guides. This will vary per product, so follow all the directions.
Although the smoke detector dimensions are important, its ability to warn you is even more so. Be sure you go over each feature so there will be no problems when using it.