LW1 Water Leak Sensor
Contact SupportThe LW1 is a long-range water leak sensor that detects water at multiple contact points and reports leak events through a compatible LoRa Hub.
LW1 Water Leak Sensor
The LW1 is a long-range water leak sensor that detects water at multiple contact points and reports leak events through a compatible LoRa Hub.
Core Functions
- Detects water through bottom, side, and top contacts.
- Sends leak events over long-range LoRa communication.
- Supports Freeze Alert using temperature data reported to the cloud.
- Provides a 105 dB local buzzer and an IP67-rated enclosure.
Product Appearance

Water Leak and Water-Level Detection
The bottom and top each have a separate group of sensing contacts. Each group detects a leak independently. Low, medium, and high water levels require water at the corresponding side contacts and at either the bottom or top contacts.
| State | Trigger condition |
|---|---|
| Bottom leak | The bottom contacts detect water. |
| Top leak | The top contacts detect water, such as water dripping onto the Sensor. |
| Low water level | The bottom or top contacts detect water, and the side low-level contacts detect water. |
| Medium water level | The bottom or top contacts detect water, and the side medium-level contacts detect water. |
| High water level | The bottom or top contacts detect water, and the side high-level contacts detect water. |
Water at the bottom or top contacts alone triggers the corresponding leak condition, but does not trigger a water-level condition unless the corresponding side contacts also detect water.
For example, if only the side low-level, medium-level, or high-level contacts are wet while both the bottom and top contacts are dry, the corresponding water-level condition is not triggered.
Temperature Data and Freeze Alert
LW1 reads temperature from a sensor inside its MCU and sends the reading to the cloud through a compatible Hub. The MOCREO Smart App does not display LW1 temperature readings or a temperature history chart; refreshing the App does not make these readings visible. The temperature-related feature available in the App is Freeze Alert, which relies on the reported temperature data rather than a user-facing temperature display.
Temperature data can be available through the API even though it is not shown in the App. LW1 is not presented as a general-purpose ambient-temperature monitor with a specified measurement range or accuracy. The operating temperature below describes the device's operating conditions, not its temperature-measurement range.
See LW1 temperature reporting for reporting behavior and limitations.
Specifications
| Specification | Details |
|---|---|
| Model | LW1 |
| Wireless Protocols | LoRa |
| Wireless Range | Up to 2133 ft (650 m), line-of-sight |
| Battery | 2 AAA batteries (replaceable) |
| Buzzer Sound Level | 105 dB at 10 cm |
| Operating Temperature | -4°F to 122°F (-20°C to 50°C) |
| IP Rating | IP67 |
| Dimensions | 2.91 × 2.36 × 1.02 in (74 × 60 × 26 mm) |
| Weight | 2.93 oz (83 g) |