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Ubiquiti USL-Environmental combines the functionality of a flood sensor, temperature sensor, humidity sensor, and light sensor in a single device. It enables monitoring of environmental conditions at a specific location and supports SuperLink wireless communication, requiring connection to a compatible gateway. The device features a 3.5 mm AUX port (TRS/TS) for connecting an external flood sensor. The built-in flood sensor is located inside the enclosure, which may be less practical in certain installation scenarios. The USL-Environmental can be mounted on a wall using screws, magnetically on a metal surface (thanks to the integrated magnet), or on virtually any surface using the included adhesive tape. Power is supplied by a CR123A battery, which can provide up to 6 years of operation. The battery is user-replaceable.

UniFi Protect Sensor with SuperLink Communication
The offered product is a sensor designed for use with the UniFi Protect system. It utilizes SuperLink wireless communication and requires connection to a compatible gateway. According to the manufacturer, the maximum transmission range is up to 2 km under full line-of-sight conditions. Obstacles and devices that interfere with the signal may negatively affect the connection range.
Flood, Temperature, Humidity, and Light Sensor
The device is capable of detecting flooding, temperature, humidity, and light levels, providing comprehensive monitoring of environmental conditions in a given location. Flood detection sensors are located on both the upper and lower sections of the enclosure. In addition, the USL-Environmental is equipped with a 3.5 mm AUX connector (TRS or TS), allowing an external flood sensor to be connected.


CR123A Battery
The device is powered by a CR123A battery, which, according to the manufacturer, can provide up to 6 years of operation. Once the battery is depleted, it can be easily replaced by the user.
Three Mounting Options
The device can be attached to a metal surface using its built-in magnet or mounted to virtually any surface using the included adhesive tape. The package also includes two mounting screws for wall installation.

Specifications
| Ubiquiti USL-Environmental | |
| Overview | |
|---|---|
| Dimensions |
Device: 53 x 49 x 23.5 mm (2.1 x 1.9 x 0.9") Mount: 41.3 x 36.6 x 3.1 mm (1.6 x 1.4 x 0.1") |
| Weatherproofing | IPX5 |
| Mounting | Adhesive, magnet and screw mount |
| UniFi Application Suite | Protect |
| Performance | |
| Connectivity | SuperLink (Proprietary) |
| Operating Frequency | 865.1 – 869.5 MHz |
| Antenna Gain | 0 dBi |
| Max. TX Power | 14 dBm |
| Max. Range | 2 km (Line of Sight) |
| Sensor Features |
Temperature Sensor Humidity Sensor Ambient Light Sensor Water Sensor (Top & Bottom) 3.5 mm AUX jack (TRS or TS) for water leak probe |
| Hardware | |
| Max. Power Consumption | 34.9 mW |
| Supported Voltage Range | 3 V |
| Power Method | Lithium battery CR123A |
| Battery Life | Up to 6 years |
| Weight |
Device: 47.8 g (1.7 oz) With mount: 70 g (2.5 oz) |
| Enclosure Material | Polycarbonate |
| Mount Material | Galvanized steel |
| Buttons |
(1) Factory reset (1) Function button |
| LEDs |
(1) Status: R/B/W (1) Signal: B/R |
| Ambient Operating Temperature | -20 to 40° C (-4 to 104° F) |
| Ambient Operating Humidity | 10 to 90% noncondensing |
| NDAA Compliant | Yes |
| Software | |
| Application Requirements |
Web Application: UniFi Protect Mobile App: UniFi Protect iOS™ and Android™ |





