
In timber-frame, wooden and prefabricated houses, high humidity and small leaks damage the structure before anything shows. Four temperature and humidity sensors watch the rooms and two water detectors keep an eye on the bathroom and the kitchen, with notifications on your phone. It runs in the eWeLink app, with Alexa and Google too, using the Sonoff Zigbee bridge included.
What it does
- The four Sonoff SNZB-02P sensors read temperature and humidity in four rooms and send the values to the app.
- If humidity stays above the threshold for hours, a notification arrives: you can air the place or switch the dehumidifier on before condensation forms.
- The two SNZB-05P water sensors, sitting on the bathroom and kitchen floor, warn as soon as they detect a leak.
- The reading history shows which rooms tend to stay damp, after showers or through the winter for example.
- The notifications reach you even when you are away.

How it is installed
What's in the kit

| Qty | Item | Unit price | Subtotal |
|---|---|---|---|
| 1 | Sonoff ZB Bridge Pro Zigbee hubCoordinator / gateway | 33,99 € | 33,99 € |
| 4 | Sonoff SNZB-02P temperature sensor (CR2477)Climate sensor | 18,90 € | 75,60 € |
| 2 | Sonoff SNZB-05P water sensor (CR2477)Water sensor | 17,22 € | 34,44 € |
| 1 | 5V 2A USB power supplies, 3 piecesAccessory: power · needed because the device comes without a power supply | 10,99 € | 10,99 € |
| Kit total | 155,02 € |
Recommended options
| Qty | Item | When you need it | Price |
|---|---|---|---|
| 1 | Spare CR2477 batteries, pack of 4 | spares for 6 CR2477 sensors | 5,27 € |
| Options total | 5,27 € |
Prices taken from Amazon.it on 22/09/2026: they can change, and the price Amazon shows at the time of purchase is the one that applies.
Add the whole kit to your Amazon basket4 items, 8 pieces · optional extras are added from the individual linksDelivery, returns and warranty: Amazon shows these when you buy.
Before you order
Do you need a hub?
Yes: the Sonoff Zigbee devices talk to the ZB Bridge Pro included in the kit, which links them to the home 2.4GHz Wi-Fi and to the eWeLink app. Without the bridge the sensors do not work.
Does it work with Alexa and Google?
Yes, through the eWeLink app: you link the eWeLink account to the Alexa skill or to the Google Home app and the devices show up there, ready for routines and for asking the readings by voice. With Apple Home there is no direct integration we can guarantee for every item in the kit.
Do you need an electrician?
No. All the sensors are battery-powered and either stick on with double-sided tape or sit on the floor; the bridge runs off a USB power supply in a socket. Nothing is wired into the installation and no holes are drilled in the timber walls.
Does it detect damp inside the walls?
No: the sensors measure the air in the rooms and water on the floor. High air humidity over long periods is, though, the warning sign that comes before condensation and mould on surfaces. Measurements inside the structure need different instruments: get in touch through the contact page.
What happens if there is no internet?
The sensors keep measuring, but without internet you get no notifications and cannot see the values from away. Some scenes can stay live locally on the bridge, as the manufacturer describes. When the line is back the data starts reaching the app again.
Are batteries included?
The sensors take CR2477 coin cells, supplied in the box according to the manufacturer. The kit also includes an optional pack of four spare CR2477 cells. Each sensor's charge level shows in eWeLink.
Can I add devices?
Yes: more sensors for other rooms, for the crawl space or the loft, a Zigbee socket to run the dehumidifier or a relay for the extractor fan. The bridge handles plenty of Sonoff Zigbee devices in the same app.
What if a product is out of stock on Amazon?
An item can go out of stock or change version. Get in touch through the contact page quoting the kit code: we will point you to an alternative that works with the other devices and with the coordinator, so the kit stays complete and performs as intended.
Why buy on Amazon?
Purchase, delivery, returns and warranty are handled by Amazon: delivery times, returns and warranty are shown on Amazon when you buy. The kit itself is our own work: we picked devices that work together and the accessories needed to fit them.
Notes
Not included
- Dehumidifier or mechanical ventilation
- A router and an internet connection
- USB power supply for the bridge
- Moisture measuring instruments for building structures
As an Amazon Associate, Litio Store earns from qualifying purchases.