The cheapest sensor in the house guards the most expensive damage · review
The only kit here whose shut-off valve still fires when the broadband is down, with six sensors, a hub and five-year batteries.
The conclusion The best answer on this shelf to the question this shelf's introduction asks about shut-off valves: Control-D2D fires a YoLink valve or siren directly over LoRa with no hub, no router and no internet, which is the only such statement here — and an outage is exactly when a leak is worst. Six sensors with 105 dB alarms, five-year replaceable cells and 2,034 feet of range for ninety-three dollars. Base contacts only, no cable, and no IP rating.
No IP rating. No probe. No sensing cable.
Because that is when a leak does the most damage.
A connected sensor normally reports to a cloud service, which messages a phone, which lets you decide. Broadband down, power out, or the service having a bad day: the chain breaks silently.
Control-D2D is device to device. The sensor talks straight to the valve or the siren over LoRa — no hub, no router, no internet.
It is the only such statement on this shelf, and it is what turns a notification into an action.
Under a floor. Behind a washing machine. The back of a cellar. An outbuilding.
Which is exactly where Wi-Fi fails, and a sensor that cannot reach its hub reports nothing.
LoRa trades bandwidth for distance and penetration — the right trade for a device that sends one short message a year.
Two thousand feet here. The shortest range on this shelf is thirty-three feet, and the difference is a factor of sixty.
For the person who is in.
A text reaches you at work. A hundred and five decibels reaches whoever is in the kitchen, in the second the water arrives rather than after a cloud round trip.
The silent detectors on this shelf — one maker states its Sensor 1 has no built-in siren at all — rely entirely on somebody looking at a phone.
Having both is why the Sensor 4 kit costs more than the silent one.
Which nobody else here does.
Amazon’s metadata says “Number of Items: 7 Pack”. YoLink spends a bullet explaining that this means seven individual products — a hub and six sensors — and not seven sensors.
A maker arguing with its own product page, in your favor.
On sale at around $93 on the American Amazon store at the time of checking.
Prices and availability are what Keepa reported on the date this page was updated; both move.
Prices quoted in this text were read on October 8, 2026. The live price is at the top of the page.
| Shut-off valve | With YoLink Control-D2D the sensors directly trigger a YoLink siren or shut-off valve FOR LOCAL PROTECTION DURING OUTAGES — stated. It is the only statement on this shelf that a valve will still close when the internet is down, and that is the case that matters: a burst hose during a power cut is when a cloud-dependent system does nothing |
|---|---|
| Alerting | Both, fully: a 105 dB alarm built into every sensor for on-site alerts, plus app, email AND SMS text alerts with sensors named by location. SMS is published by only this maker on this shelf and it reaches a phone with no app installed |
| Range | Long-range LoRa, reliable where Wi-Fi struggles, up to 2,034 ft open air — stated. It is the longest range on this shelf, where the shortest requires the sensor within 33 ft of its hub. A leak sensor lives in a cellar or behind an appliance, which is the worst radio position in a house, and this is the specification that addresses it |
| Battery | 2 AAA cells per sensor with up to 5 years of typical life and easy replacement — stated, and tied with the longest figure on this shelf. AAA cells are replaceable, unlike the sealed battery on one detector here |
| Supplied | One hub and six sensors, seven items in total — and YoLink spends a bullet correcting Amazon's own metadata, explaining that "Number of Items: 7 Pack" means seven individual products and not seven sensors. No other maker on this shelf corrects its own listing page |
| Platform | One hub supports 300+ YoLink devices, with standard Hub, SpeakerHub and Cellular Hub options — stated. A Cellular Hub is the logical extension of the outage argument: a hub on a mobile network reports when the line is cut |
| Sensing element | Base contacts. No cable and no remote probe is published, where one detector on this shelf supplies a 5 ft cable extendable to 500 ft |
| Ratings | No IP rating published, where three detectors on this shelf publish IP65 or IP67 |
| Price | Ninety-three dollars for six sensors and a hub — about twelve dollars a sensor once the hub is counted, which is cheaper per point than four of the single units on this shelf |
| Amazon reference | B0DPH3KL69 |
| EAN | 0810121542040 |
Because that is when a leak does the most damage and when most systems stop working. A connected sensor normally reports to a cloud service, which messages your phone, which lets you decide — and if the broadband is down, the power is out, or the service is having a bad day, the chain breaks silently. YoLink Control-D2D is device-to-device: the sensor talks straight to the valve or the siren over LoRa with no hub, no router and no internet involved. It is the only such statement on this shelf, and it is what turns a notification into an action.
For this specific device, markedly. A leak sensor goes where water arrives — under a floor, behind a washing machine, at the back of a cellar, in an outbuilding — which is exactly where Wi-Fi fails, and a sensor that cannot reach its hub reports nothing. LoRa trades bandwidth for distance and penetration, which is the right trade for a device that sends one short message a year. Two thousand feet of open-air range is the longest figure on this shelf; the shortest is 33 feet, and the difference is a factor of sixty.
Yes, for the person who is in. A text reaches you at work; a 105 dB alarm reaches whoever is standing in the kitchen, and it reaches them in the second the water arrives rather than after a cloud round trip. The detectors on this shelf that are silent — and one maker states plainly that its Sensor 1 has no built-in siren — rely entirely on somebody looking at a phone. Having both is the point of this kit, and it is why the Sensor 4 version costs more than the silent one.
Between security devices of the same category and nearby price. Shown: what they all state. A half-filled column says nothing.
| Model | Price | Alerting | Battery | Sensing element |
|---|---|---|---|---|
| YoLink YS1603+6YS7906 Leak Sensor 4 kit, 105 dB alarm, 6 sensors and a hub | $93 | Both, fully: a 105 dB alarm built into every sensor for on-site alerts, plus app, email AND SMS text alerts with sensors named by location. SMS is published by only this maker on this shelf and it reaches a phone with no app installed | 2 AAA cells per sensor with up to 5 years of typical life and easy replacement — stated, and tied with the longest figure on this shelf. AAA cells are replaceable, unlike the sealed battery on one detector here | Base contacts. No cable and no remote probe is published, where one detector on this shelf supplies a 5 ft cable extendable to 500 ft |
| RESIDEO CHW3610W8001 L1 Wi-Fi water leak and freeze detector | $62 | Both: a 100 dB alarm and LED status lights at the unit, plus mobile push and email notifications. One of four detectors on this shelf to publish a decibel figure and do both jobs | Not published. The device is described as battery-operated with no cell type, no count and no runtime, where four detectors on this shelf publish a figure and two of those claim five years | A 5-foot cable sensor that detects water along its ENTIRE LENGTH, with additional cables extending the run to 500 feet — stated. This shelf's introduction names exactly this as the second thing worth understanding: feet on the base detect water that reaches the unit, a sensing cable detects water somewhere awkward. At least seven of the fourteen detectors on this shelf are base contacts; this is the one that can be looped round a boiler or laid along a wall |
| YoLink YS1603+4YS7903 Leak Sensor 1 kit, 4 sensors and a hub | $60 | Remote only, and stated outright: "Leak Sensor 1 has NO BUILT-IN SIREN; add SpeakerHub or a YoLink siren for audible or spoken alerts if desired." This shelf's introduction makes local versus remote the first distinction worth understanding, and this is the only listing on this shelf that declares its own side of it rather than leaving you to infer it from silence | NOT PUBLISHED. No cell type, no count and no runtime appears, where the maker's own Sensor 4 on this shelf states 2 AAA and up to five years. At least four of the fourteen detectors here publish a figure | Base contacts. No probe and no sensing cable, where one detector on this shelf supplies a 5 ft cable extendable to 500 ft |
| Aqara TZ-005 Water Leak Sensor, Zigbee, 3-pack | $55 | Both, through the hub: an instant phone alert AND the local alarm on the Aqara Hub. The sensor itself makes no sound, so the noise happens wherever the hub is rather than where the water is | Not published. No cell type, no count and no runtime appears; Aqara only says to remove the battery tab before use and to check the battery level if the device does not work. At least four of the fourteen detectors here publish a figure | Highly sensitive probes on the body, with no wiring and no screws — placeable on any flat surface. No remote probe and no cable |
Details checked on October 8, 2026.
A whole house, a basement or an outbuilding beyond Wi-Fi reach, where a valve must close during a power cut
Amazon reports what buyers took in the month before this page was last checked: at least 1,000.
The figure is a floor, rounded by Amazon, and read through Keepa — it says what buyers picked, not what a maker claims.
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.
