A faulty valve, a leaky gasket in the dishwasher, or water slowly leaking from under the washing machine often go unnoticed for hours. The Shelly Flood S Gen4 allows you to detect the problem before it leads to damp walls, wet floors, or damage to your appliances. The sensor uses three large detection fields made of stainless steel, allowing it to quickly respond to both regular water and low-conductivity liquids, such as air conditioning condensate or distilled water. Wi-Fi, Bluetooth, and Zigbee connectivity, support for the Matter standard, and a battery life of approximately 2 years make this device an integral part of a modern smart home system.
Most places where leaks occur are out of sight. The Shelly Flood S Gen4 has a compact design measuring 23 × 77 mm—it can be discreetly tucked under a washing machine, dishwasher, or refrigerator. Even if a minor leak occurs, the device will immediately detect the threat and send a notification, allowing you to respond quickly no matter where you are. Its IP67 rating further enhances its resistance to harsh conditions and accidental splashes.
The Shelly Flood S Gen4 can not only immediately send an alert to your smartphone but also trigger pre-configured automations. When paired with a compatible smart valve, the system can automatically shut off the water supply, reducing the risk of costly damage. Importantly, these automations operate locally, so protection remains active even without cloud access.
The Shelly Flood S Gen4 sensor isn’t just for indoor use. You can choose between two operating modes: flood detection and rainfall detection. In the latter case, the device can become part of a smart home management system and respond to changing weather conditions. When it starts to rain, the system can pause garden watering, extend awnings, or close skylights. Additionally, three alarm profiles are available—Intense, Normal, and Economic—and the built-in buzzer immediately alerts you to a detected threat.
Support for the Matter standard enables integration with various platforms, and compatibility with the Shelly Smart Control app and popular home automation systems allows you to create complex action scenarios. The device works with Amazon Alexa, Google Smart Home, Samsung SmartThings, and Home Assistant, among others. Wi-Fi 6, Bluetooth 5 LE, and Zigbee 3.0 connectivity provide great flexibility in configuration and allow you to tailor communication methods to your individual needs.
The sensor can be used in apartments, single-family homes, multi-family buildings, commercial facilities, farms, educational institutions, and public buildings. It is ideal for monitoring areas under sinks, near water heaters, close to filters and valves, as well as next to toilets, washing machines, and dishwashers.
| Manufacturer | Shelly |
|---|---|
| Model | Flood S Gen4 |
| Dimensions (H × D) | 23 × 77 mm |
| Weight | 50 g (without battery) / 70 g (with battery) |
| Mounting method | On a flat surface |
| Housing material | Plastic |
| Housing color | White |
| Operating temperature | From -20°C to 40°C |
|---|---|
| Humidity | 30% to 100% RH |
| Maximum operating altitude | 2000 m |
| Power supply | Battery-powered |
|---|---|
| Battery type | 1 × CR123A (included) |
| Estimated operating time | Approximately 2 years (depending on battery type, usage intensity, and network signal strength) |
| Water Detection | Yes |
|---|
| Standard | 802.11 b/g/n/ax |
|---|---|
| Frequency Band | 2401–2483 MHz |
| Maximum RF Transmission Power | < 20 dBm |
| Range | Up to 30 m indoors and up to 50 m outdoors (depending on local conditions) |
| Standard | Bluetooth 5 LE |
|---|---|
| Frequency Band | 2402–2480 MHz |
| Maximum RF Transmission Power | < 20 dBm |
| Range | Up to 10 m indoors and up to 30 m outdoors (depending on local conditions) |
| Standard | 802.15.4 |
|---|---|
| Frequency band | 2405–2480 MHz |
| Maximum RF transmission power | < 20 dBm |
| Range | Up to 100 m indoors and up to 300 m outdoors (depending on local conditions) |
| Processor | ESP-Shelly-C68F |
|---|---|
| Flash memory | 8 MB |
| Schedules | No |
|---|---|
| Webhooks (URL actions) | 10, with the ability to assign 2 URLs to each event |
| Script support | No |
| MQTT | Yes |
| UDP | Yes |
| KVS (Key-Value Store) | Yes |
Gifts with orders are constantly changing due to their limited quantity
FREE DELIVERY ON PURCHASES OF EUR 50 AND MORE
Free delivery to the Omniva postal machine when purchasing more than 50 EUR
Free delivery to LP Express or Lithuanian Post when purchasing more than 70 EUR
Free delivery to home or workplace when purchasing more than 150 EUR.
DELIVERY TO Express or Omniva PARCEL TERMINAL
Shipping costs EUR 2.49. To LP Express 3.99
If ordered before 14:00, we ship the goods on the same day (only on working days). Your order will be delivered to the parcel terminal within 1-3 working days from the day of dispatch. The nearest post office from the address you provided is automatically selected.
It is not possible to direct the shipment to another delivery location. You can collect the package at a time convenient for you. Parcel terminals are open 24 hours a day.
DELIVERY TO LITHUANIA POST OFFICES
The price of delivery to post offices is EUR 3.99.
If ordered before 14:00, we ship the goods on the same day (only on working days). The goods will be delivered to Lithuanian post offices within 1-3 working days from the day of dispatch.
HOME OR WORKPLACE DELIVERY BY COURIER
Delivery price - 4.99 EUR
The order will be picked up by a courier and delivered directly to your home or workplace. It usually takes 1-3 working days from the day of dispatch.
DELIVERY TO FOREIGN COUNTRIES
Delivery price - 6.99 EUR.
The order is dispatched within 2 working days. The delivery time varies depending on the country to which the package is going. In many cases, the delivery time is only 2-3 days longer than in Lithuania.
PS The price of delivery may increase if the goods are very large or their weight exceeds the standards indicated on the pages of the delivery services. In such cases, we contact and discuss the situation ourselves, you do not need to do anything additional.
