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Water Leak Sensors · Head to head

Aeotec Water Sensor 7 Pro vs YoLink Water Leak Sensor 4

Full Smart Water Leak Sensors comparison in 2026

Updated October 2026
Data from Amazon and official Aeotec and YoLink sites.
2026 verdict
Flat on a crawlspace floor, the YoLink Water Leak Sensor 4 is the water leak sensor to lay there when the crawl is too far for a short-range mesh.
YoLink Water Leak Sensor 4
Winner
YoLink Water Leak Sensor 4
$17.09$23.9929% OFF
Buy on Amazon USACheck price
It is IP66, rated for 5 years on AAA cells, with a sound and a light, and it is the more affordable, better reviewed of the two. The Aeotec Water Sensor 7 Pro answers with a probe cable, full temperature alerts and Z-Wave, but it is IP20 and silent. Both can warn about a freeze. Pick the YoLink for range and a siren in the crawl, and the Aeotec when a Z-Wave hub and a cable are already the plan.
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FeatureAeotec Water Sensor 7 ProYoLink Water Leak Sensor 4Winner
Price$29.99$17.09YoLink Water Leak Sensor 4
Rating4.14.7YoLink Water Leak Sensor 4
Warranty1 year2 yearsYoLink Water Leak Sensor 4
Weather ResistanceIP20IP66YoLink Water Leak Sensor 4
Battery Life3 years5 yearsYoLink Water Leak Sensor 4
IntegrationsSamsung SmartThings, Home AssistantHome AssistantAeotec Water Sensor 7 Pro
On Device Alert SoundNOYESYoLink Water Leak Sensor 4
On Device Alert LightNOYESYoLink Water Leak Sensor 4
ConnectivityZ-WaveOtherTie
SensorsWater Leak, TemperatureWater Leak, TemperatureTie
AlertsWater Leak Alerts, Temperature Alerts, Freeze Temperature AlertsWater Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Low Battery AlertsTie

What the differences mean

Cable or a body on the dirt

The Aeotec Water Sensor 7 Pro includes a sensor cable, so the electronics can sit somewhere drier while the probe lies on the crawlspace floor. The YoLink Water Leak Sensor 4 has no cable. The whole sensor has to be where the water will be. That is easier to accept because the YoLink is IP66 and the Aeotec body is only IP20. The probe is the Aeotec's way of reaching water its housing should not sit in.

Z-Wave or LoRa

The Aeotec needs a Z-Wave hub and lists SmartThings and Home Assistant, not Alexa, Google Home or Apple Home. The YoLink needs a YoLink hub over LoRa and lists Home Assistant, not SmartThings, Google Home, Apple Home or Alexa. A crawlspace at the far end of the house is where YoLink owners say the LoRa link still answers. The Aeotec stays on the Z-Wave network you already run.

Siren in the crawl

The YoLink has an on-device sound and light, described as 105 dB, including when the hub is offline. The Aeotec Water Sensor 7 Pro has neither. In a crawlspace nobody walks through, a local siren is often the only way someone in the house hears the leak before the phone does. The Aeotec's alert is the hub's job.

Freeze sensing and battery

Both list freeze alerts. The Aeotec has a full temperature sensor plus temperature alerts, rated for 3 years on an ER14250 cell, with a 1-year warranty. A low-battery alert on the Aeotec is not documented. The YoLink's temperature entry is low temperatures, with low-temperature alerts, a 5-year AAA rating, low-battery alerts and a 2-year warranty. The longer life and the siren are why the crawlspace case leans YoLink even though both see a freeze.

Which one to buy if

What owners say

Owners of the Aeotec Water Sensor 7 Pro praise a sensitive probe cable for heater pans, sumps and tight gaps, plus Home Assistant and SmartThings once Z-Wave pairing sticks. They complain about a fiddly pair sequence on some hubs and about corrosion if the probe stays wet. Owners of the YoLink Water Leak Sensor 4 praise saves at a water heater or a washer hose, LoRa range into far corners, and a 105 dB siren that still sounds if the hub drops offline. They complain that the app is confusing at first, that a YoLink hub is mandatory, and that there is no cable, so the body itself has to meet the water.

Price history compared

Every price change of both, in the same store, so the gap between the two lines is what one costs more than the other.

  • Aeotec Water Sensor 7 Pro
  • YoLink Water Leak Sensor 4

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Frequently Asked Questions

Which is better in a crawlspace: the Aeotec Water Sensor 7 Pro or the YoLink Water Leak Sensor 4?

The YoLink Water Leak Sensor 4. It is more affordable, better reviewed, IP66, rated for 5 years, and it sounds and lights on the device over LoRa. The Aeotec Water Sensor 7 Pro is the Z-Wave pick with a probe cable and full temperature alerts, if the crawl is inside Z-Wave range and you can keep the IP20 body out of the water.

Does the YoLink Water Leak Sensor 4 work with SmartThings?

No. SmartThings, Google Home, Apple Home and Alexa are not listed. It needs a YoLink hub and lists Home Assistant. The Aeotec Water Sensor 7 Pro lists SmartThings and Home Assistant over Z-Wave, and it does not list Alexa or Google Home.

Which one includes a sensor cable?

The Aeotec Water Sensor 7 Pro. The YoLink Water Leak Sensor 4 does not, so the sensor body has to sit where the water will reach. The Aeotec can leave the body drier and put only the probe in the wet spot.

Do both water leak sensors warn about freezing?

Yes. The Aeotec Water Sensor 7 Pro has a temperature sensor plus temperature and freeze alerts. The YoLink Water Leak Sensor 4 lists low-temperature sensing and freeze alerts, plus an on-device siren the Aeotec lacks.

Who should buy the Aeotec Water Sensor 7 Pro?

Z-Wave households that want a probe cable and full temperature alerts in Home Assistant or SmartThings, and that can place an IP20 sensor where it detects water without sitting in it.

Who should buy the YoLink Water Leak Sensor 4?

Buyers covering a crawlspace, garage or outbuilding who can add a YoLink hub and want IP66, a 5-year AAA rating and a siren that still sounds if the link drops.

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