Ensuring the safety of your household from the threat of fire is paramount. The First Alert 9120B Hardwired Ionization Smoke Alarm with Battery Backup is designed to provide early detection of smoke, offering vital protection against fast-flaming fires that can spread rapidly. This informational guide covers everything you need to know about this essential safety device.
The First Alert 9120B is a 120-volt hardwired smoke alarm that integrates seamlessly into your home’s electrical system. It is equipped with an ionization smoke sensor, specifically tuned to detect smoke particles emitted during fast-flaming fires. This makes it highly effective in scenarios involving materials like paper or grease that combust quickly.
Ionization Sensor Technology
The ionization sensor is optimized to detect smoke particles from fast-flaming fires, providing early warning that is crucial for escaping safely.
Battery Backup
In case of a power outage, the included 9-volt battery ensures continuous operation, maintaining your safety even when electrical power is unavailable.
Interconnectivity
The 9120B can be interconnected with up to 12 other compatible First Alert or BRK hardwired smoke detectors. This means that if one alarm is triggered, all interconnected alarms will sound, alerting everyone in the household simultaneously.
Easy Installation
Installing the First Alert 9120B is straightforward with its hassle-free mounting system. There’s no need for rewiring; simply follow the provided instructions to secure it properly.
Visual and Audible Alerts
It features a latching indicator that identifies which unit initiated the alarm, helping you locate the source quickly. The 85-dB alarm at 10 feet ensures that the sound is loud and clear enough to alert even those in other rooms.
Comprehensive Coverage
 This smoke alarm is suitable for various locations within your home, providing comprehensive coverage against fire hazards.
Model and Compatibility
The 9120B model is compatible with its replacement, the SMI100-AC, ensuring continuity and ease of maintenance in existing installations or upgrades.
Sensor Technology
The ionization sensor is optimized to detect smoke particles typically produced by fast-flaming fires. These fires are characterized by their rapid spread, making early detection crucial for timely evacuation and fire containment.
Power Source and Backup
The smoke alarm is directly wired into the household electrical system (120 volts AC), ensuring continuous operation under normal conditions. In case of a power outage, the 9V battery backup kicks in, maintaining the alarm’s functionality and keeping your home protected when electrical power is unavailable.
Interconnectivity
The 9120B smoke alarm supports interconnectivity with up to 12 compatible devices. When one unit detects smoke, it triggers all interconnected alarms, providing comprehensive alerts throughout the home and facilitating swift evacuation.
Sound and Visual Indicators
The alarm emits a loud 85dB sound at a distance of 10 feet, ensuring it is heard clearly throughout typical residential spaces. The latching indicator visually identifies which unit in the interconnected system triggered the alarm, aiding in identifying the fire’s location.
Dimensions and Weight
Product Dimensions:
Compact dimensions and lightweight design facilitate easy installation and placement in various locations within the home, including bedrooms, hallways, and living areas.
Warranty
The First Alert 9120B comes with a 10-year limited warranty, ensuring long-term reliability and peace of mind for homeowners regarding its performance and durability.
Installation and Maintenance
Installing the First Alert 9120B involves mounting it securely to the ceiling or wall, following local electrical codes. Ensure that you test the alarm regularly using the test button and replace the battery annually or as needed. The unit’s low battery indicator will alert you when it’s time for a replacement.
The First Alert 9120B Hardwired Ionization Smoke Alarm with Battery Backup is an essential component of your home safety toolkit. With its advanced ionization sensor, easy installation, and reliable performance, it offers peace of mind by providing early detection of fast-flaming fires. Investing in a smoke alarm like the 9120B is a proactive step towards safeguarding your home and loved ones from the devastating effects of fire.
Pros:
Early Detection: The ionization sensor detects fast-flaming fires promptly.
Reliable Power: Hardwired with a 9-volt battery backup for continuous operation.
Interconnectivity: Can connect with up to 12 other alarms for comprehensive alerts.
Easy Installation: Hassle-free setup with a user-friendly design.
Audible and Visual Alerts: loud alarm (85 dB) and latching indicator for clear alerts.
Compact and Warranty: Compact size with a 10-year limited warranty.
Cons:
Sensor Limitation: Less sensitive to slow, smoldering fires.
Battery Maintenance: Requires regular replacement of the 9V battery.
Interconnectivity Needs: Requires compatible alarms for full integration.
Installation Requirements: Must follow local electrical codes; may need professional help.
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The 9120B smoke alarm is equipped with an ionization sensor optimized to detect smoke particles from fast-flaming fires, such as those caused by paper or kitchen grease.
It is hardwired into the home’s electrical system (120 volts AC) and includes a 9-volt battery backup. This ensures continuous operation even during power outages.
The 9V battery should be replaced at least once a year, or as soon as the low battery indicator chirps, signaling that the battery is running low.
No, this model is designed for residential use. Commercial establishments typically require smoke alarms that meet different regulatory standards.
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