Shelly Flood S Gen4
The Shelly Flood S Gen4 is Matter certified (certificate CSA25430MAT45954-24, certified Jun 30, 2025). It uses Wi-Fi, so it needs no Thread border router, only your platform’s Matter controller. A certified Matter device can be added to any Matter controller whose app supports its device type, such as Apple Home, Google Home, Alexa, SmartThings or Home Assistant; features vary by app. The maker hasn’t named platforms on a page we hold. Sold in the US at Shelly US and Newegg.
Certificate data as of . Set-up steps and sources: Apple Home · Google Home · Alexa · SmartThings · Home Assistant
CSA Matter certified (certificate CSA25430MAT45954-24). Uses Wi-Fi, so it needs no Thread border router, only your platform’s Matter controller.
At a glance: Matter certified: Yes, Jun 30, 2025 · Connectivity: Wi-Fi, Bluetooth · Thread border router: Not needed (uses Wi-Fi)
- Works with
- Matter certified as a water leak detector, so it can work with Matter apps such as Apple Home, Google Home, Alexa and SmartThings when the app supports its device type; supported features vary by app. The maker hasn’t named platforms on a page we hold.
- CSA certificate
- CSA25430MAT45954-24, certified Jun 30, 2025
- Network & hub
- Wi-Fi; needs no Thread border router, only your platform’s Matter controller
- Model number
- S4SN-0071Z
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Shelly US
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2 stores
Shelly US
Notes
Link to Shelly US's product page. Confirm the exact variant, current price and delivery at the retailer.
Newegg
Notes
Affiliate link to Newegg's US product page for Shelly Flood S Gen4 Smart Water Leak Sensor, Matter-over-Wi-Fi, Wi-Fi 6, Zigbee 3.0, Bluetooth 5 LE, IP67, CR1; GTIN 3800238073701 equals this record's GTIN. Newegg Marketplace listing (third-party seller); confirm the seller and condition. Confirm the exact variant, current price and delivery at the retailer.
Check the model, region and pack size at the retailer. Prices and availability are confirmed there.
CSA model/software record
Certificate: CSA25430MAT45954-24Matter 1.3 certificate
Its certificate, CSA25430MAT45954-24, is for Matter 1.3, certified Jun 30, 2025. The Matter version is the specification version on the certificate's ledger record.
Source: CSA Distributed Compliance Ledger, read Oct 19, 2026.
What Matter 1.3 added, and which devices use it →Battery-powered water leak sensor with stainless-steel sensing pads and a built-in buzzer, rated IP67; runs on one CR123A battery (included). Matter over Wi-Fi, with Bluetooth for setup.
Specifications
- Brand
- Shelly
- Category
- Sensors
- Protocols
- Wi-Fi, Bluetooth, Matter
- Certificate ID
- CSA25430MAT45954-24
- Certified
- Jun 30, 2025
- Certified model
- S4SN-0071Z
- Certified software version
- 1.3.0-s1
Certification covers the named model(s) and software version(s) listed. It does not verify firmware installed on a retail unit or current retail availability. View CSA model/software record
Ecosystem compatibility
Quick answers
- Is the Shelly Flood S Gen4 Matter certified?
- Yes. CSA Matter certificate CSA25430MAT45954-24 covers model S4SN-0071Z with software 1.3.0-s1. The certificate does not establish the firmware on a unit you buy.
- Does the Shelly Flood S Gen4 work with Apple Home or HomeKit?
- Likely. It is Matter certified (certificate CSA25430MAT45954-24), so any Matter controller whose app supports its device type can add it. The maker hasn’t named Apple Home on a page we hold. Apple says an iPhone using iOS 18 or later can add Matter accessories to the Home app without a home hub.
- Does the Shelly Flood S Gen4 work with Google Home?
- Likely. It is Matter certified (certificate CSA25430MAT45954-24), so any Matter controller whose app supports its device type can add it. The maker hasn’t named Google Home on a page we hold. Google says you need a Matter-enabled hub device set up on your home wireless network before you can add Matter devices to Google Home.
- Does the Shelly Flood S Gen4 work with Alexa?
- Likely. It is Matter certified (certificate CSA25430MAT45954-24), so any Matter controller whose app supports its device type can add it. The maker hasn’t named Alexa on a page we hold. Alexa needs a Matter-compatible Echo; Amazon says its Echo devices support “a subset of Matter 1.5 and lower device types”, so check that yours does.
- Does the Shelly Flood S Gen4 work with Samsung SmartThings?
- Likely. It is Matter certified (certificate CSA25430MAT45954-24), so any Matter controller whose app supports its device type can add it. The maker hasn’t named SmartThings on a page we hold. SmartThings adds Matter devices through the SmartThings app and a Matter controller.
- Does the Shelly Flood S Gen4 work with Home Assistant?
- Likely. It is Matter certified (certificate CSA25430MAT45954-24), so any Matter controller whose app supports its device type can add it. The maker hasn’t named Home Assistant on a page we hold. Home Assistant says: “Adding a new Matter device only works in the Home Assistant Companion app.”
- Does the Shelly Flood S Gen4 use Thread or Wi-Fi?
- Wi-Fi. Its catalog record lists Wi-Fi, so it joins your Wi-Fi network and does not need a Thread border router. You still need your platform’s Matter controller.
- Does the Shelly Flood S Gen4 need a hub or a Thread border router?
- No hub of its own and no Thread border router: it joins your Wi-Fi network. You still need your platform’s Matter controller (a smart speaker, display, streaming box or hub), though Apple says an iPhone using iOS 18 or later can add Matter accessories without a home hub.
- When was the Shelly Flood S Gen4 Matter certified?
- The CSA certified it on Jun 30, 2025 (certificate CSA25430MAT45954-24, software 1.3.0-s1). That is its certification date, not a retail release date, which MatterCatalog does not state.
- Where can I buy the Shelly Flood S Gen4?
- MatterCatalog has verified store links for it at Shelly US and Newegg. Check the current price, model and pack size at the store.
From this product’s catalog record, not hands-on testing. Editorial policy
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Shelly Flood S Gen4
CSA model/software record