The cheapest sensor in the house guards the most expensive damage · review
A connected leak detector: X-Sense states six sensing points — two upper and four lower — with a push notification to a phone as well as a local alarm and a tone from the base station.
The conclusion The one that works in an empty house, which is where leaks do their damage. Arrange a key holder before you rely on it.
A local-only detector makes a noise in the room it is in. If nobody is in the house, that noise is a tree falling in a forest.
A push notification to a phone. In a holiday home, a second property, or any house whose occupants work away, that is the difference between an hour of water and a weekend of it — and a weekend of it is a floor, a ceiling and a kitchen.
It also sounds locally and on the base station, so a household that is in still hears it in the room and elsewhere in the house.
Four on the base, two higher up. The lower four report water arriving; the upper two report it rising, which distinguishes a spilt bucket from a burst pipe.
It depends on Wi-Fi, and a flood serious enough to matter may also be a power cut. And a notification is only worth what you can do with it: if you are two hundred kilometers away, you need a neighbor with a key and a stopcock. Arrange that before relying on the sensor.
X-Sense states detection from 0.4 mm of water, with a flashing red light, and an alarm adjustable up to 110 dB on both the sensor and the base, silenced from the app or by a button. Radio range is up to 500 m (1,640 ft), the housing is IP66, the included batteries are stated at about three years and the unit at five. The app shares the device with family, tests the sensor, warns of a low battery and snoozes the alarm for 10 minutes to 12 hours. It does not work with Alexa.
Anybody whose house is regularly empty.
Listed but with no offer on the American Amazon store — the reference exists there and nobody is currently selling it.
Prices and availability are what Keepa reported on the date this page was updated; both move.
| Sensing | 2 upper and 4 lower sensors, stated by X-Sense |
|---|---|
| Alerting | Push notification to phone, plus local and base station alarm |
| Connectivity | Wi-Fi, via X-Sense base station |
| Type | Compact flood sensor |
| Volume | Adjustable up to 110 dB, on the sensor and the base |
| Sensitivity | From 0.4 mm of water, stated by X-Sense |
| Range | Up to 500 m (1,640 ft) to the base station |
| Weather rating | IP66, stated by the manufacturer |
| Battery | Replaceable batteries included, about 3 years; 5-year device life stated; not Alexa compatible |
| Amazon reference | DE B0BJ6B1LPQ · US B0BDFX2LR9 · GB B0BJ6B1LPQ · FR B0BJ6B1LPQ · IT B0BJ6B1LPQ · ES B0BJ6B1LPQ |
| EAN | 0850042393499 |
In an empty house, yes, without argument — a local alarm in an empty building is a noise nobody hears, and the difference between an hour of water and a weekend of it is the whole cost of a floor. In an occupied house it is a convenience.
Rising water. Four points on the base detect water arriving; two higher up detect it continuing to rise, which distinguishes a spill from a flood. X-Sense states the two levels detect both leaks and floods.
Then you need somebody who can get there — a neighbor, a key holder, a letting agent. A connected sensor buys information, and information is only worth what you can do with it. Arrange the second half before relying on the first.
8.1/ 10
The one that works in an empty house, which is where leaks do their damage. Arrange a key holder before you rely on it.
A reference exists on these Amazon stores: France, Germany, Italy, Spain, United Kingdom, United States. Listed is not the same as in stock — availability changes daily.
Details checked on September 2, 2026.
A property you leave — a holiday home, a second home, or any house whose owners work away.
Specifications: the manufacturer sheet for home security products and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
85 dB · two floor probes · stands on the floor · basement, laundry, kitchen, utility room
A standalone water alarm that stands on the floor with two probes underneath. ABUS states an 85 dB tone that sounds as long as the probes are in contact with water or another conductive liquid.
Best for: The floor beside a washing machine, a dishwasher or a water heater.
90 dB · three units · two electrodes on the base · wall or floor · ABS
Three water alarms at 90 dB with two electrodes on the base, which GOMETY states trigger immediately on contact with water. Wall or floor mounting, in ABS plastic, with no wiring or programming.
Best for: Covering three risks at once — the usual number in a house with a basement.
85 dB · sealed 10-year lithium battery · miniature floor sensor
A miniature floor sensor with a sealed lithium battery that SEBSON states lasts ten years. No battery to change, and no battery compartment to corrode.
Best for: A place you will not revisit — under a bath, behind a built-in appliance, beside a boxed-in water heater.
