# Ubiquiti Smoke and CO Alarm

*Ubiquiti / USL-Smoke, USL-Smoke-US*

> The Smoke and CO Alarm detects smoke and carbon monoxide and uses SuperLink wireless. Its battery lasts up to ten years. It suits Home Assistant users, with native support through the maker's hub.

- Canonical page: https://smarthomecanon.com/devices/unifi-smoke-and-co-alarm
- Last checked: 2026-10-20

## Key facts

| Fact | Value |
| --- | --- |
| Brand | [Ubiquiti](https://smarthomecanon.com/brands/ubiquiti) |
| Category | Smoke or gas detector |
| Model numbers | USL-Smoke, USL-Smoke-US |
| Status | Current[^1] |
| Type | Sensor[^2] |
| Connection | SuperLink[^2] |
| Power | CR123A for SuperLink, up to 10 years. Sealed smoke and CO batteries, 10 years.[^2] |
| Range | 2 km[^2] |
| What it does | Smoke and CO alarm, 85 dB at 3 m[^2] |
| US availability | Sold out[^1] |

## Integration paths

**How the Ubiquiti Smoke and CO Alarm connects**

| Path | Requires | Local | Features lost |
| --- | --- | --- | --- |
| [Proprietary + hub](https://smarthomecanon.com/protocols/proprietary-gateway) | A SuperLink Gateway, A UniFi console running UniFi Protect[^3][^2] | unknown | unknown |

**Platform support for the Ubiquiti Smoke and CO Alarm**

| Path | Platform | Support | Integration |
| --- | --- | --- | --- |
| Proprietary + hub | [Home Assistant](https://smarthomecanon.com/platforms/home-assistant) | withheld | unifiprotect |
| Proprietary + hub | [Homey](https://smarthomecanon.com/platforms/homey) | withheld | com.ubnt.unifiprotect |

## Related pages

- [UniFi Protect sensors, alarms and chimes](https://smarthomecanon.com/lines/unifi-protect-sensors-and-alarms) (line)
- [Ubiquiti](https://smarthomecanon.com/brands/ubiquiti) (brand)
- [Proprietary radio with a hub](https://smarthomecanon.com/protocols/proprietary-gateway) (protocol)
- [Home Assistant](https://smarthomecanon.com/platforms/home-assistant) (platform)
- [Homey](https://smarthomecanon.com/platforms/homey) (platform)

## Sources

[^1]: UniFi US store: Smoke and CO Alarm. https://store.ui.com/us/en/products/usl-smoke (manufacturer, checked 2026-10-10)
[^2]: UniFi Tech Specs: Smoke and CO Alarm (USL-Smoke). https://techspecs.ui.com/unifi/physical-security/usl-smoke (manufacturer, checked 2026-10-10)
[^3]: UniFi SuperLink Gateway Setup and FAQs (help.ui.com). https://help.ui.com/hc/en-us/articles/29711478053911-UniFi-SuperLink-Gateway-Setup-and-FAQs (manufacturer, checked 2026-10-10)