The Smart Device Compare comparison

Shelly Flood S Gen4 vs X-Sense Wi-Fi Water Leak Detector

Understand the differences. Decide what matters to your home.

Before you compare every specification

Key differences between Shelly Flood S Gen4 and X-Sense Wi-Fi Water Leak Detector

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

2.4 GHz Wi-Fi (connectivity): Shelly Flood S Gen4 — Yes (Wi-Fi 6, 802.11 b/g/n/ax on 2401-2483 MHz); X-Sense Wi-Fi Water Leak Detector — No.
Bluetooth (connectivity): Shelly Flood S Gen4 — Yes (Bluetooth 5 LE); X-Sense Wi-Fi Water Leak Detector — No.
Automations (features): Shelly Flood S Gen4 — Yes (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.); X-Sense Wi-Fi Water Leak Detector — No.
On Device Alert Light (features): Shelly Flood S Gen4 — Yes (Multi-color LED button that reports pairing, Wi-Fi, cloud and OTA state); X-Sense Wi-Fi Water Leak Detector — No.

Specifications to check side by side

Other (connectivity): Shelly Flood S Gen4 — No; X-Sense Wi-Fi Water Leak Detector — Sub-1G (SBS50 Base Station required) (The SWS51 detector links to the X-Sense SBS50 base station over 915 MHz (US) / 868 MHz (EU), up to 1,640 ft (500 m) in open air; the base station carries the 2.4 GHz Wi-Fi connection (802.11b/g/n)).
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.); X-Sense Wi-Fi Water Leak Detector — No.
Battery Life (power): Shelly Flood S Gen4 — 2 years; X-Sense Wi-Fi Water Leak Detector — 3 years.
Battery Type (power): Shelly Flood S Gen4 — CR123A (1 x CR123A, included); X-Sense Wi-Fi Water Leak Detector — 2x AAA.

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.

Option 1 · Shelly

Shelly Flood S Gen4

Last updated October 2026

View full device profile

Option 2 · X-Sense

X-Sense Wi-Fi Water Leak Detector

Last updated October 2026

View full device profile

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.

12differences with recorded values for every device

0rows with missing or unspecified information

Consider your setup

Apple Home

Shelly Flood S Gen4Yes
X-Sense Wi-Fi Water Leak DetectorNo

Confirm which features appear in Apple Home and whether extra hardware or a subscription is needed for your intended use.

Inspect the specifications

Consider your setup

Matter

Shelly Flood S Gen4Yes
X-Sense Wi-Fi Water Leak DetectorNo

Confirm the exact device type and the features exposed in your chosen platform. Protocol support does not establish feature parity across apps.

Inspect the specifications

Consider your setup

Battery Life

Shelly Flood S Gen42 years
X-Sense Wi-Fi Water Leak Detector3 years

Compare the stated test conditions. Catalog battery figures alone do not predict runtime in your home.

Inspect the specifications

Your 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.

Differences onlyMy priorities (0)

Showing 28 of 28 rows. “Not recorded” does not mean “No”.

Reading layout

Alerts

Freeze Temperature Alerts

Shelly Flood S Gen4: No
X-Sense Wi-Fi Water Leak Detector: No

Low Battery Alerts

Shelly Flood S Gen4: Yes
Catalog note
Short beep (0.3 sec on, 5 sec off) once the battery level drops below 20%
X-Sense Wi-Fi Water Leak Detector: Yes

Tamper Alerts

Shelly Flood S Gen4: No
X-Sense Wi-Fi Water Leak Detector: No

Temperature Alerts

Shelly Flood S Gen4: No
X-Sense Wi-Fi Water Leak Detector: No

Water Leak Alerts

Shelly Flood S Gen4: Yes
Catalog note
Push notification plus local buzzer, with Intense, Normal and Economic alarm profiles
X-Sense Wi-Fi Water Leak Detector: Yes

Connectivity

2.4 GHz Wi-Fi

Shelly Flood S Gen4: Yes
Catalog note
Wi-Fi 6, 802.11 b/g/n/ax on 2401-2483 MHz
X-Sense Wi-Fi Water Leak Detector: No

5 GHz Wi-Fi

Shelly Flood S Gen4: No
X-Sense Wi-Fi Water Leak Detector: No

Bluetooth

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: 2026-10-04

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

X-Sense Wi-Fi Water Leak Detector

Other

Shelly Flood S Gen4: No
X-Sense Wi-Fi Water Leak Detector: Sub-1G (SBS50 Base Station required)
Catalog note
The SWS51 detector links to the X-Sense SBS50 base station over 915 MHz (US) / 868 MHz (EU), up to 1,640 ft (500 m) in open air; the base station carries the 2.4 GHz Wi-Fi connection (802.11b/g/n)

Thread

Shelly Flood S Gen4: No
X-Sense Wi-Fi Water Leak Detector: No

Z Wave

Shelly Flood S Gen4: No
X-Sense Wi-Fi Water Leak Detector: No

Zigbee

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.
X-Sense Wi-Fi Water Leak Detector: No

Features

Automations

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.
X-Sense Wi-Fi Water Leak Detector: No

On Device Alert Light

Shelly Flood S Gen4: Yes
Catalog note
Multi-color LED button that reports pairing, Wi-Fi, cloud and OTA state
X-Sense Wi-Fi Water Leak Detector: No

On Device Alert Sound

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: 2026-10-04

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

X-Sense Wi-Fi Water Leak Detector

Yes

Catalog note

110 dB on the detector (the SBS50 base station alarm is 100 dB)

Included Accessories

Sensor Cable

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.
X-Sense Wi-Fi Water Leak Detector: No

Integrations

Alexa

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
X-Sense Wi-Fi Water Leak Detector: 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

Apple Home

Shelly Flood S Gen4: Yes
Catalog note
Via Matter
X-Sense Wi-Fi Water Leak Detector: No

Google Home

Shelly Flood S Gen4: Yes
Catalog note
Shelly lists the Google Smart Home Sensor State trait for this model
X-Sense Wi-Fi Water Leak Detector: No

Home Assistant

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
X-Sense Wi-Fi Water Leak Detector: Yes
Catalog note
Community X-Sense integration for Home Assistant (HACS), which lists this model and reads it from the X-Sense cloud account

Matter

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: 2026-10-04

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.

X-Sense Wi-Fi Water Leak Detector

SmartThings

Shelly Flood S Gen4: Yes
Catalog note
Shelly lists the SmartThings Battery and Water Sensor capabilities for this model
X-Sense Wi-Fi Water Leak Detector: No

Power

Battery Life

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: 2026-10-04

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.

X-Sense Wi-Fi Water Leak Detector

3 years

Battery Type

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: 2026-10-04

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

X-Sense Wi-Fi Water Leak Detector

2x AAA

Wired

Shelly Flood S Gen4: No
X-Sense Wi-Fi Water Leak Detector: No

Sensors

Temperature

Shelly Flood S Gen4: No
Catalog note
Water detection is the only entry under the sensors section of the official specification
X-Sense Wi-Fi Water Leak Detector: No

Tilt

Shelly Flood S Gen4: No
X-Sense Wi-Fi Water Leak Detector: No

Water Leak

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: 2026-10-04

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.

X-Sense Wi-Fi Water Leak Detector

Yes

Catalog note

4 bottom sensor probes and 2 top sensor probes to detect water leaks and floods, providing an early warning of water damage; suitable for kitchens, bathrooms, basements, and more

Specifications for Shelly Flood S Gen4 versus X-Sense Wi-Fi Water Leak Detector
Specification	Shelly Flood S Gen4	X-Sense Wi-Fi Water Leak Detector
Alerts
Freeze Temperature Alerts	No	No
Low Battery Alerts	Yes Catalog note Short beep (0.3 sec on, 5 sec off) once the battery level drops below 20%	Yes
Tamper Alerts	No	No
Temperature Alerts	No	No
Water Leak Alerts	Yes Catalog note Push notification plus local buzzer, with Intense, Normal and Economic alarm profiles	Yes
Connectivity
2.4 GHz Wi-Fi	Yes Catalog note Wi-Fi 6, 802.11 b/g/n/ax on 2401-2483 MHz	No
5 GHz Wi-Fi	No	No
Bluetooth	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 2026-10-04 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	No
Other	No	Sub-1G (SBS50 Base Station required) Catalog note The SWS51 detector links to the X-Sense SBS50 base station over 915 MHz (US) / 868 MHz (EU), up to 1,640 ft (500 m) in open air; the base station carries the 2.4 GHz Wi-Fi connection (802.11b/g/n)
Thread	No	No
Z Wave	No	No
Zigbee	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.	No
Features
Automations	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.	No
On Device Alert Light	Yes Catalog note Multi-color LED button that reports pairing, Wi-Fi, cloud and OTA state	No
On Device Alert Sound	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 2026-10-04 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	Yes Catalog note 110 dB on the detector (the SBS50 base station alarm is 100 dB)
Included Accessories
Sensor Cable	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.	No
Integrations
Alexa	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	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
Apple Home	Yes Catalog note Via Matter	No
Google Home	Yes Catalog note Shelly lists the Google Smart Home Sensor State trait for this model	No
Home Assistant	Yes Catalog note Shelly names Home Assistant on the product page, and the official Shelly integration covers Gen4 devices over Wi-Fi	Yes Catalog note Community X-Sense integration for Home Assistant (HACS), which lists this model and reads it from the X-Sense cloud account
Matter	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 2026-10-04 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.	No
SmartThings	Yes Catalog note Shelly lists the SmartThings Battery and Water Sensor capabilities for this model	No
Power
Battery Life	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 2026-10-04 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.	3 years
Battery Type	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 2026-10-04 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	2x AAA
Wired	No	No
Sensors
Temperature	No Catalog note Water detection is the only entry under the sensors section of the official specification	No
Tilt	No	No
Water Leak	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 2026-10-04 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.	Yes Catalog note 4 bottom sensor probes and 2 top sensor probes to detect water leaks and floods, providing an early warning of water damage; suitable for kitchens, bathrooms, basements, and more

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