The Smart Device Compare comparison
Shelly Flood S Gen4 vs YoLink Water Leak Sensor 4
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Key differences between Shelly Flood S Gen4 and YoLink Water Leak Sensor 4
A summary of selected recorded differences between these water leak sensors. Check the full specification table below for details and conditions.
Feature differences among your selected devices
- Freeze Temperature Alerts (alerts): Shelly Flood S Gen4 — No; YoLink Water Leak Sensor 4 — Yes.
- 2.4 GHz Wi-Fi (connectivity): Shelly Flood S Gen4 — Yes (Wi-Fi 6, 802.11 b/g/n/ax on 2401-2483 MHz); YoLink Water Leak Sensor 4 — No.
- Bluetooth (connectivity): Shelly Flood S Gen4 — Yes (Bluetooth 5 LE); YoLink Water Leak Sensor 4 — No.
- Apple Home (integrations): Shelly Flood S Gen4 — Yes (Via Matter); YoLink Water Leak Sensor 4 — No.
Specifications to check side by side
- Temperature Alerts (alerts): Shelly Flood S Gen4 — No; YoLink Water Leak Sensor 4 — Low Temperatures.
- Other (connectivity): Shelly Flood S Gen4 — No; YoLink Water Leak Sensor 4 — LoRa (YoLink hub required).
- Zigbee (connectivity): Shelly Flood S Gen4 — Zigbee Hub required (Zigbee 3.0 over 802.15.4. Five rapid button presses switch the device between its default Matter firmware and Zigbee, and it then joins through a Zigbee hub.); YoLink Water Leak Sensor 4 — No.
- Battery Life (power): Shelly Flood S Gen4 — 2 years; YoLink Water Leak Sensor 4 — 5 years.
These observations are derived from recorded catalog data and have not all been independently verified. Confirm details with the manufacturer before purchasing.
Compare capabilities, compatibility and setup requirements.
What the catalog tells us
Understand the tradeoffs.
These counts describe the available data, not a quality score. More features do not automatically make a better device.
13differences with recorded values for every device
0rows with missing or unspecified information
Consider your setup
Apple Home
- Shelly Flood S Gen4Yes
- YoLink Water Leak Sensor 4No
Confirm which features appear in Apple Home and whether extra hardware or a subscription is needed for your intended use.
Inspect the specificationsConsider your setup
Matter
- Shelly Flood S Gen4Yes
- YoLink Water Leak Sensor 4No
Confirm the exact device type and the features exposed in your chosen platform. Protocol support does not establish feature parity across apps.
Inspect the specificationsConsider your setup
Battery Life
- Shelly Flood S Gen42 years
- YoLink Water Leak Sensor 45 years
Compare the stated test conditions. Catalog battery figures alone do not predict runtime in your home.
Inspect the specificationsYour priorities, side by side
Focus on what changes.
Mark the specifications you care about. Open manufacturer sources for verification scope; fields without citations remain catalog data. Expand notes for other qualifications.
Showing 28 of 28 rows. “Not recorded” does not mean “No”.
Alerts
- Shelly Flood S Gen4
- No
- YoLink Water Leak Sensor 4
- Yes
- Shelly Flood S Gen4
- Yes
Catalog note
Short beep (0.3 sec on, 5 sec off) once the battery level drops below 20%
- YoLink Water Leak Sensor 4
- Yes
- Shelly Flood S Gen4
- No
- YoLink Water Leak Sensor 4
- No
- Shelly Flood S Gen4
- No
- YoLink Water Leak Sensor 4
- Low Temperatures
- Shelly Flood S Gen4
- Yes
Catalog note
Push notification plus local buzzer, with Intense, Normal and Economic alarm profiles
- YoLink Water Leak Sensor 4
- Yes
Connectivity
- Shelly Flood S Gen4
- Yes
Catalog note
Wi-Fi 6, 802.11 b/g/n/ax on 2401-2483 MHz
- YoLink Water Leak Sensor 4
- No
- Shelly Flood S Gen4
- No
- YoLink Water Leak Sensor 4
- No
- Shelly Flood S Gen4
- Yes
Manufacturer source
Bluetooth 5 LE is specified.
Shelly Flood S Gen4 manufacturer product page →- Source section
- Technical details: device description and main features
- Model
- Shelly Flood S Gen4
- Region
- US manufacturer storefront; check the exact regional hardware variant
- Firmware
- Not specified by this source
- Checked
Battery life depends on the selected alarm profile, connectivity and usage.
Document check only; not a hands-on test or verification of every regional or firmware variant.
Catalog note
Bluetooth 5 LE
- YoLink Water Leak Sensor 4
- No
- Shelly Flood S Gen4
- No
- YoLink Water Leak Sensor 4
- LoRa (YoLink hub required)
- Shelly Flood S Gen4
- No
- YoLink Water Leak Sensor 4
- No
- Shelly Flood S Gen4
- No
- YoLink Water Leak Sensor 4
- No
- Shelly Flood S Gen4
- Zigbee Hub required
Catalog note
Zigbee 3.0 over 802.15.4. Five rapid button presses switch the device between its default Matter firmware and Zigbee, and it then joins through a Zigbee hub.
- YoLink Water Leak Sensor 4
- No
Features
- Shelly Flood S Gen4
- Yes
Catalog note
Local automation actions that keep running without cloud access, plus 10 webhooks with 2 URLs each and MQTT. Scripting and schedules are not supported on this model.
- YoLink Water Leak Sensor 4
- Yes
- Shelly Flood S Gen4
- Yes
Catalog note
Multi-color LED button that reports pairing, Wi-Fi, cloud and OTA state
- YoLink Water Leak Sensor 4
- Yes
- Shelly Flood S Gen4
- Yes
Manufacturer source
A built-in buzzer provides a local alarm.
Shelly Flood S Gen4 manufacturer product page →- Source section
- Technical details: device description and main features
- Model
- Shelly Flood S Gen4
- Region
- US manufacturer storefront; check the exact regional hardware variant
- Firmware
- Not specified by this source
- Checked
Battery life depends on the selected alarm profile, connectivity and usage.
Document check only; not a hands-on test or verification of every regional or firmware variant.
Catalog note
Built-in buzzer, 3.5 sec on / 1.5 sec off during a flood alarm
- YoLink Water Leak Sensor 4
- Yes
Catalog note
105dB
Included Accessories
- Shelly Flood S Gen4
- No
Catalog note
The box holds only the sensor, its CR123A battery and the printed guide. The probe is the triple stainless-steel pad on the underside, so there is no extendable cable like the one bundled with the Shelly Flood Gen4.
- YoLink Water Leak Sensor 4
- No
Integrations
- Shelly Flood S Gen4
- No
Catalog note
Alexa has no water leak sensor type: the Matter Water Leak Detector has no Alexa capability mapping, and bridges such as SmartThings or Home Assistant cannot expose a moisture sensor either
- YoLink Water Leak Sensor 4
- No
Catalog note
Alexa has no water leak sensor type: the Matter Water Leak Detector has no Alexa capability mapping, and bridges such as SmartThings or Home Assistant cannot expose a moisture sensor either
- Shelly Flood S Gen4
- Yes
Catalog note
Via Matter
- YoLink Water Leak Sensor 4
- No
- Shelly Flood S Gen4
- Yes
Catalog note
Shelly lists the Google Smart Home Sensor State trait for this model
- YoLink Water Leak Sensor 4
- No
- Shelly Flood S Gen4
- Yes
Catalog note
Shelly names Home Assistant on the product page, and the official Shelly integration covers Gen4 devices over Wi-Fi
- YoLink Water Leak Sensor 4
- Yes
- Shelly Flood S Gen4
- Yes
Manufacturer source
Matter operates over Wi-Fi.
Shelly Flood S Gen4 manufacturer product page →- Source section
- Technical details: device description and main features
- Model
- Shelly Flood S Gen4
- Region
- US manufacturer storefront; check the exact regional hardware variant
- Firmware
- Not specified by this source
- Checked
Battery life depends on the selected alarm profile, connectivity and usage.
Document check only; not a hands-on test or verification of every regional or firmware variant.
Catalog note
Matter over Wi-Fi, and the device ships with the Matter firmware by default. Certified by the CSA as Shelly Flood S Gen4, certificate CSA25430MAT45954-24.
- YoLink Water Leak Sensor 4
- No
- Shelly Flood S Gen4
- Yes
Catalog note
Shelly lists the SmartThings Battery and Water Sensor capabilities for this model
- YoLink Water Leak Sensor 4
- No
Power
- Shelly Flood S Gen4
- 2 years
Manufacturer source
The stated battery life is up to two years.
Shelly Flood S Gen4 manufacturer product page →- Source section
- Technical details: device description and main features
- Model
- Shelly Flood S Gen4
- Region
- US manufacturer storefront; check the exact regional hardware variant
- Firmware
- Not specified by this source
- Checked
Battery life depends on the selected alarm profile, connectivity and usage.
Document check only; not a hands-on test or verification of every regional or firmware variant.
- YoLink Water Leak Sensor 4
- 5 years
- Shelly Flood S Gen4
- CR123A
Manufacturer source
Power comes from a CR123A battery.
Shelly Flood S Gen4 manufacturer product page →- Source section
- Technical details: device description and main features
- Model
- Shelly Flood S Gen4
- Region
- US manufacturer storefront; check the exact regional hardware variant
- Firmware
- Not specified by this source
- Checked
Battery life depends on the selected alarm profile, connectivity and usage.
Document check only; not a hands-on test or verification of every regional or firmware variant.
Catalog note
1 x CR123A, included
- YoLink Water Leak Sensor 4
- 2x AAA
- Shelly Flood S Gen4
- No
- YoLink Water Leak Sensor 4
- No
Sensors
- Shelly Flood S Gen4
- No
Catalog note
Water detection is the only entry under the sensors section of the official specification
- YoLink Water Leak Sensor 4
- Low Temperatures
- Shelly Flood S Gen4
- No
- YoLink Water Leak Sensor 4
- No
- Shelly Flood S Gen4
- Yes
Manufacturer source
Conductive pads detect water leaks.
Shelly Flood S Gen4 manufacturer product page →- Source section
- Technical details: device description and main features
- Model
- Shelly Flood S Gen4
- Region
- US manufacturer storefront; check the exact regional hardware variant
- Firmware
- Not specified by this source
- Checked
Battery life depends on the selected alarm profile, connectivity and usage.
Document check only; not a hands-on test or verification of every regional or firmware variant.
Catalog note
Large-surface triple-pad stainless-steel sensor, rated for clean and low-conductivity water such as condensation or distilled water. State is checked every 5 seconds.
- YoLink Water Leak Sensor 4
- Yes
| Specification | Shelly Flood S Gen4 | YoLink Water Leak Sensor 4 |
|---|---|---|
| Alerts | ||
| No | Yes | |
YesCatalog noteShort beep (0.3 sec on, 5 sec off) once the battery level drops below 20% | Yes | |
| No | No | |
| No | Low Temperatures | |
YesCatalog notePush notification plus local buzzer, with Intense, Normal and Economic alarm profiles | Yes | |
| Connectivity | ||
YesCatalog noteWi-Fi 6, 802.11 b/g/n/ax on 2401-2483 MHz | No | |
| No | No | |
YesManufacturer sourceBluetooth 5 LE is specified. Shelly Flood S Gen4 manufacturer product page →
Battery life depends on the selected alarm profile, connectivity and usage. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog noteBluetooth 5 LE | No | |
| No | LoRa (YoLink hub required) | |
| No | No | |
| No | No | |
Zigbee Hub requiredCatalog noteZigbee 3.0 over 802.15.4. Five rapid button presses switch the device between its default Matter firmware and Zigbee, and it then joins through a Zigbee hub. | No | |
| Features | ||
YesCatalog noteLocal automation actions that keep running without cloud access, plus 10 webhooks with 2 URLs each and MQTT. Scripting and schedules are not supported on this model. | Yes | |
YesCatalog noteMulti-color LED button that reports pairing, Wi-Fi, cloud and OTA state | Yes | |
YesManufacturer sourceA built-in buzzer provides a local alarm. Shelly Flood S Gen4 manufacturer product page →
Battery life depends on the selected alarm profile, connectivity and usage. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog noteBuilt-in buzzer, 3.5 sec on / 1.5 sec off during a flood alarm | YesCatalog note105dB | |
| Included Accessories | ||
NoCatalog noteThe box holds only the sensor, its CR123A battery and the printed guide. The probe is the triple stainless-steel pad on the underside, so there is no extendable cable like the one bundled with the Shelly Flood Gen4. | No | |
| Integrations | ||
NoCatalog noteAlexa has no water leak sensor type: the Matter Water Leak Detector has no Alexa capability mapping, and bridges such as SmartThings or Home Assistant cannot expose a moisture sensor either | NoCatalog noteAlexa has no water leak sensor type: the Matter Water Leak Detector has no Alexa capability mapping, and bridges such as SmartThings or Home Assistant cannot expose a moisture sensor either | |
YesCatalog noteVia Matter | No | |
YesCatalog noteShelly lists the Google Smart Home Sensor State trait for this model | No | |
YesCatalog noteShelly names Home Assistant on the product page, and the official Shelly integration covers Gen4 devices over Wi-Fi | Yes | |
YesManufacturer sourceMatter operates over Wi-Fi. Shelly Flood S Gen4 manufacturer product page →
Battery life depends on the selected alarm profile, connectivity and usage. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog noteMatter over Wi-Fi, and the device ships with the Matter firmware by default. Certified by the CSA as Shelly Flood S Gen4, certificate CSA25430MAT45954-24. | No | |
YesCatalog noteShelly lists the SmartThings Battery and Water Sensor capabilities for this model | No | |
| Power | ||
2 yearsManufacturer sourceThe stated battery life is up to two years. Shelly Flood S Gen4 manufacturer product page →
Battery life depends on the selected alarm profile, connectivity and usage. Document check only; not a hands-on test or verification of every regional or firmware variant. | 5 years | |
CR123AManufacturer sourcePower comes from a CR123A battery. Shelly Flood S Gen4 manufacturer product page →
Battery life depends on the selected alarm profile, connectivity and usage. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note1 x CR123A, included | 2x AAA | |
| No | No | |
| Sensors | ||
NoCatalog noteWater detection is the only entry under the sensors section of the official specification | Low Temperatures | |
| No | No | |
YesManufacturer sourceConductive pads detect water leaks. Shelly Flood S Gen4 manufacturer product page →
Battery life depends on the selected alarm profile, connectivity and usage. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog noteLarge-surface triple-pad stainless-steel sensor, rated for clean and low-conductivity water such as condensation or distilled water. State is checked every 5 seconds. | Yes | |
Know what’s behind the comparison.
The table matches specifications by section and field. It preserves notes, separates missing data from explicit “No” values, and keeps qualifications attached to their values. No overall winner is assigned from feature counts.
Read our comparison methodology