Zephyr's Market Adapter Plate for X-Sense Smoke & CO Alarms, Universal Fit

Give your new X-Sense alarm a finished, factory look on any existing ceiling or wall box.

Older smoke and CO detectors typically had wide footprints—often around 5 to 5½ inches across—leaving exposed drywall cutouts, unpainted rings, or old screw holes when replacing them with compact modern alarms. Measuring a generous 5.7 inches (145 mm) in diameter, this retrofit plate provides ample coverage to completely conceal older detector footprints and standard electrical boxes without requiring patching or repainting.

One Universal plate is engineered to work across X-Sense's smoke, CO, and combination alarm lineup. The alarm-side face includes both 2-hole and 3-hole pilot patterns, covering compact units (such as the XS01 and XS0B-MR series) as well as larger combo and CO models. You mount your alarm's own factory bracket directly to the plate exactly as you would to a ceiling box.

The junction box side features 6 counterbored screw slots sized for standard electrical box patterns: 3.5" round or octagon boxes, standard single-gang boxes, and 4" octagon boxes. A large center cutout keeps line wiring and wire nuts easily accessible during installation.

What's included: 1 adapter plate (5.7" outer diameter), printed in durable PETG plastic, and a set of short self-tapping screws sized for the plate.

• Generous 5.7" Diameter Coverage: Sized at 5.7 inches wide to fully cover oversized ceiling cutouts, single-gang junction boxes, and unpainted rings left behind by older 5½" legacy detector mounting bases.
• Universal Fit for X-Sense Alarms: Features both 2-hole and 3-hole mounting patterns, providing direct compatibility across X-Sense lines including the XS01, XS0B-MR, and larger combination alarms.
• Fits Standard Junction Boxes: 6 counterbored mounting slots fit 3.5" round, 3.5" octagon, single-gang, and 4" octagon boxes with flush-mount hardware alignment.
• Cleaner Look, No Drywall Patching: Bridges the gap between compact modern alarms and legacy ceiling boxes so you don't have to spackle or touch up ceiling paint.
• Simple Hardware Install: Includes short self-tapping screws to securely attach your X-Sense mounting bracket to the pre-aligned pilot holes on the plate.

Note: Zephyr's Market is an independent accessory manufacturer. This plate is designed to be compatible with alarms sold under the X-Sense brand but is not manufactured, sold, or endorsed by X-Sense, and X-Sense has not authorized this listing. The plate is a cosmetic and mechanical mounting accessory only; it is not part of, and does not alter, the UL listing of your smoke or CO alarm. Always follow your alarm manufacturer's installation instructions and local electrical code.