Winner
18% OFF
$32.99
$39.99
Updated October 2026
Data from the official Eufy and X-Sense sites.
2026 verdict
If you already run a eufy HomeBase, the eufy Security Flood & Freeze Sensor E20 is the more capable sensor here.
It adds freeze alerts with five thresholds, an alert light, a 75 dB local buzzer and an extension probe, and its CR123A is rated for five years. The X-Sense Wi-Fi Water Leak Detector is the more independent and cheaper choice: it needs only its own base station, carries six probes and a loud alarm, and is IP66 rated. Choose the eufy Security Flood & Freeze Sensor E20 when it can sit on an existing eufy setup and you want freeze cover, and the X-Sense Wi-Fi Water Leak Detector for a low-cost, standalone leak alarm.
Works with
Connectivity
- Wi-Fi 2.4 GHz
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$15.99
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| Feature | eufy Security Flood & Freeze Sensor E20 | X-Sense Wi-Fi Water Leak Detector | Winner |
|---|---|---|---|
| Price | $32.99 | $11.39 | X-Sense Wi-Fi Water Leak Detector |
| Rating | 4.3 | 4.5 | X-Sense Wi-Fi Water Leak Detector |
| Weather Resistance | IP54 | IP66 | X-Sense Wi-Fi Water Leak Detector |
| Battery Life | 5 years | 3 years | eufy Security Flood & Freeze Sensor E20 |
| Sensors | Water Leak, Temperature | Water Leak | eufy Security Flood & Freeze Sensor E20 |
| Alerts | Water Leak Alerts, Freeze Temperature Alerts, Low Battery Alerts | Water Leak Alerts, Low Battery Alerts | eufy Security Flood & Freeze Sensor E20 |
| On Device Alert Light | YES | NO | eufy Security Flood & Freeze Sensor E20 |
| Connectivity | 2.4 GHz WiFi | Other | Tie |
| Integrations | Home Assistant | Home Assistant | Tie |
| On Device Alert Sound | YES | YES | Tie |
What the differences mean
Freeze alerts
The eufy Security Flood & Freeze Sensor E20 warns below 4 C with five thresholds in the app. The X-Sense Wi-Fi Water Leak Detector detects water only, with no temperature or freeze sensing.
Probe or cable
The eufy Security Flood & Freeze Sensor E20 ships with a 1.2 m extension probe for gaps under appliances. The X-Sense Wi-Fi Water Leak Detector has no cable, so it detects water only where its body sits.
Alarm
The eufy Security Flood & Freeze Sensor E20 has a 75 dB buzzer and a red alert light. The X-Sense Wi-Fi Water Leak Detector sounds a 110 dB alarm from the detector and 100 dB from its base station, but has no alert light.
Base station
The eufy Security Flood & Freeze Sensor E20 needs a compatible US eufy HomeBase. The X-Sense Wi-Fi Water Leak Detector needs its own SBS50 base station, so neither is a standalone Wi-Fi sensor.
Battery and housing
The eufy Security Flood & Freeze Sensor E20 is rated for five years on a CR123A but is only IP54. The X-Sense Wi-Fi Water Leak Detector runs up to three years on AAA cells but is IP66, the more water-resistant rating.
Coverage points
The X-Sense Wi-Fi Water Leak Detector has six probes, four beneath and two on top, so it catches drips from a fixture overhead. The eufy Security Flood & Freeze Sensor E20 relies on its pins and its probe.
Which one to buy if
- you already own a compatible eufy HomeBase
The eufy Security Flood & Freeze Sensor E20 pairs to it and adds freeze alerts and an extension probe.
- pipes in an unheated space could freeze
The eufy Security Flood & Freeze Sensor E20 watches for freezing temperatures with five thresholds; the X-Sense Wi-Fi Water Leak Detector does not.
- you want the lowest-cost leak alarm
The X-Sense Wi-Fi Water Leak Detector is the cheaper device of the two.
- the sensor sits somewhere damp
The X-Sense Wi-Fi Water Leak Detector is IP66 rated, against IP54 on the eufy Security Flood & Freeze Sensor E20.
- you need to catch a drip from a fixture overhead
The X-Sense Wi-Fi Water Leak Detector has two top probes for drips from above, which the eufy Security Flood & Freeze Sensor E20 lacks.
Winner
18% OFF
$32.99
$39.99
- + Battery Life: 5 years
- + Sensors: Water Leak, Temperature
- + Alerts: Water Leak Alerts, Freeze Temperature Alerts, Low Battery Alerts
- - Price: $32.99 vs $11.39
- - Rating: 4.3 vs 4.5
29% OFF
$11.39
$15.99
- + Price: $11.39
- + Rating: 4.5
- + Weather Resistance: IP66
- - Battery Life: 3 years vs 5 years
- - Sensors: Water Leak vs Water Leak, Temperature
What owners say
X-Sense Wi-Fi Water Leak Detector owners describe setup as quick and the alarm as genuinely loud, and several say it caught a sump pump failure or an appliance leak before it became flood damage. They like the six probes, four underneath and two on top, and the IP66 body that fits behind a toilet or under an appliance. Their complaints are that it needs the SBS50 base station, that it has no temperature or tilt sensing and no automations, and that alerts stay inside the X-Sense app unless they are pulled into Home Assistant through a community integration. A few mention the tiny printed manual.
Frequently Asked Questions
Which is better overall: eufy Security Flood & Freeze Sensor E20 or X-Sense Wi-Fi Water Leak Detector?
The eufy Security Flood & Freeze Sensor E20 for homes already on eufy that want leak plus freeze detection, a longer battery and an extension probe. The X-Sense Wi-Fi Water Leak Detector is the better standalone buy on price and weather resistance.
Does the eufy Security Flood & Freeze Sensor E20 need a hub?
Yes. It connects over Sub-1G to a compatible US eufy HomeBase and cannot report without one. The X-Sense Wi-Fi Water Leak Detector needs its own SBS50 base station instead.
Does the X-Sense Wi-Fi Water Leak Detector warn about freezing?
No. It detects water only. The eufy Security Flood & Freeze Sensor E20 is the one with freeze alerts, below 4 C with five thresholds.
Which one has the louder alarm?
The X-Sense Wi-Fi Water Leak Detector, at 110 dB from the detector and 100 dB from its base station. The eufy Security Flood & Freeze Sensor E20 has a 75 dB buzzer plus a red alert light.
Do either of these detect drips from above?
The X-Sense Wi-Fi Water Leak Detector does, with two probes on top in addition to four underneath. The eufy Security Flood & Freeze Sensor E20 senses through pins and its extension probe, not from above.
Who should buy the X-Sense Wi-Fi Water Leak Detector?
Buyers who want a cheaper, well-rated leak alarm with a loud siren and a water-resistant body, and who do not need temperature or freeze sensing.
Who should buy the eufy Security Flood & Freeze Sensor E20?
Households that already own a compatible eufy HomeBase and want leak and freeze alerts, an extension probe for tight gaps and a long-life battery.
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