Product Description - BRK SMI100-AC Interconnect Hardwire Smoke Alarm with Battery Backup

BRK SMI100-AC Interconnect Hardwire Smoke Alarm with Battery Backup

The BRK Model SMI100-AC is a professional-grade, hardwired direct wire-in smoke and carbon monoxide alarm designed to provide comprehensive, dual-hazard residential fire safety. Engineered as a seamless replacement for the legacy Model 9120B, this premium unit combines high-accuracy ionization and electrochemical sensors with advanced precision detection. Complete with a replaceable 9V alkaline battery backup for non-stop whole-home protection during utility failures, the SMI100-AC integrates the innovative Perfect Mount installation system to deliver dependable, code-compliant security.

Key Features

Dual Sensing & Precision Detection: Combines an ionization smoke sensing chamber optimized for rapid fast-flaming fires with an electrochemical CO sensor, both engineered with an extended 10-year service life.
Smart Hardwire Interconnectivity: Network-connects with up to 18 total units (maximum of 12 smoke alarms and 6 other companion alarms). When one interconnected alarm activates, every compatible alarm across the grid sounds instantly.
Perfect Mount & Quick Connect: The included heavy-duty mounting bracket supports a wide rotation range for perfect visual alignment, while the specialized Easy Adapter Plug ensures rapid, error-free wiring.
Comprehensive Latching & Silence Controls: Outfitted with discrete Alarm Latch and Low Battery Latch indicators to instantly spotlight initiating problem units, paired with convenient one-touch Alarm and Low Battery Silence overrides.
Automated Self-Diagnostics: Automatically runs comprehensive internal electronic testing cycles, supplying clear auditory indicators for system malfunctions (3 chirps) and End-of-Life warnings (5 chirps).
Tamper-Resistant Security: Incorporates dual mechanical locking features utilizing heavy-duty pins to securely lock down both the internal battery drawer and the primary chassis mount.
Remodeling Dust Shield: Includes a temporary pull-off construction dust cover to safeguard delicate internal chambers from fine particle damage during drywalling, painting, or renovations.

Product Specifications

Attribute	Specification
BRK Model Number	SMI100-AC (Direct Retrofit for Legacy Model 9120B)
Device Configuration	Hardwired Interconnectable Combination Smoke & Carbon Monoxide (CO) Alarm
Sensing Elements	Ionization (Smoke Tracking) & Electrochemical (CO Tracking)
Carbon Monoxide Alarm Thresholds	• 70 PPM within 60–240 minutes • 150 PPM within 10–50 minutes • 400 PPM within 4–15 minutes
Primary Power Source	120V AC, 60Hz Direct Wire-In Utility Line
Emergency Battery Backup	(1) 9V Alkaline Battery (Replaceable Backup)
Interconnection Capacity	Hardwire Interconnectable with up to 18 units max (12 Smoke Alarms max)
Acoustic Alarm Level	85dB Clear Auditory Warning Output at 10 feet
Product Dimensions	5.6" Length x 5.6" Width x 1.9" Height
Product Net Weight	0.6 lbs
System Indicators	Distinct Green/Red Visual Status Lights (AC Mode vs. Battery Mode)
Malfunction / End-of-Life Signals	3 Chirps (Malfunction) \| 5 Chirps (End-of-Life, with Temporary Silence)
Box Contents	SMI100-AC Base, Easy Adapter Plug, 9V Alkaline Battery, Construction Dust Cover
Certifications & Standards	Conforms to UL 217 8th Edition, UL2034, CSFM, NFPA 72, ICC Standards
Manufacturer Warranty	10-Year Limited Warranty Cover

Sensor Safety Information

Sensor Insights: Smoke particles of varying number and size are produced in all fires. For maximum protection, use both ionization and photoelectric sensing technologies. Ionization alarms are generally more sensitive to fast-flaming fires, whereas photoelectric alarms are generally more sensitive to smoldering fires.

Applications

Residential Placements: Ideal life-safety layout across residential master bedrooms, multi-level hallways, walk-in closets, and general living zones.
Multi-Family Developments: Code-compliant protection for multi-unit apartment complexes, luxury condominiums, and dormitories.
Construction & Retrofits: Engineered for quick integration into new construction projects or as a modern upgrade for legacy building safety networks.
Flexible Layout: Specially structured for secure ceiling-mounted or wall-mounted electrical bracket implementations.

Product Specifications PDF

Click Here to View Full PDF Specification Sheet

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Shipping

We offer FREE SHIPPING for orders with a minimum of $1000.00 in total amount to US destinations only except Hawaii and Alaska. This offer is subject to change without prior notice.

We can ship anywhere within United States and to some parts of the world. Note that there are restrictions on some products, and some products cannot be shipped to destinations outside California.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for the items we sell are weight-based. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

Returns Policy

You may return most new, unopened items within 1 year of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

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