# Ubiquiti Environmental Sensor

*Ubiquiti / USL-Environmental, USL-Environmental-US*

> The Environmental Sensor watches for water leaks, temperature, humidity and ambient light. It is a battery-powered SuperLink sensor with up to six years of battery life. It suits Home Assistant users through an integration (the maker's hub).

- Canonical page: https://smarthomecanon.com/devices/unifi-environmental-sensor
- Last checked: 2026-10-20

## Key facts

| Fact | Value |
| --- | --- |
| Brand | [Ubiquiti](https://smarthomecanon.com/brands/ubiquiti) |
| Category | Temperature and humidity sensor |
| Model numbers | USL-Environmental, USL-Environmental-US |
| Status | Current[^1] |
| Type | Sensor[^2] |
| Connection | SuperLink[^2] |
| Power | CR123A battery, up to 6 years[^2] |
| Range | 2 km[^2] |
| What it does | Water leak, temperature, humidity, ambient light[^2] |
| US availability | Sold out[^1] |

## Integration paths

**How the Ubiquiti Environmental Sensor 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 Environmental Sensor**

| Path | Platform | Support | Integration |
| --- | --- | --- | --- |
| Proprietary + hub | [Home Assistant](https://smarthomecanon.com/platforms/home-assistant) | withheld | UniFi Protect |
| 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: Environmental Sensor. https://store.ui.com/us/en/products/usl-environmental (manufacturer, checked 2026-10-10)
[^2]: UniFi Tech Specs: Environmental Sensor (USL-Environmental). https://techspecs.ui.com/unifi/physical-security/usl-environmental (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)