Water Leak Sensors · Head to head

eufy Security Flood & Freeze Sensor E20 vs Moen Smart Leak Detector

Full Smart Water Leak Sensors comparison in 2026

Updated October 2026
Data from Amazon and official Eufy and Moen sites.
2026 verdict
The eufy Security Flood & Freeze Sensor E20 wins for anyone inside the eufy ecosystem: a five-year CR123A, a 1.2 m extension probe and freeze alerts at five thresholds make it a set-and-forget leak detector.
eufy Security Flood & Freeze Sensor E20
Winner
eufy Security Flood & Freeze Sensor E20
$39.99

Last recorded price

Buy on Amazon USA
The Moen Smart Leak Detector counters with an IP67 housing, temperature and humidity trends, a wider alert set and a 48-inch remote disc, and it reports over plain 2.4 GHz Wi-Fi, but its app setup has a rougher reputation. Pick the eufy if you already run a eufy HomeBase, and the Moen when the sensor has to work with no hub.
vs
Moen Smart Leak Detector
Moen

Moen Smart Leak Detector

Prime exclusive deal
$54.72

Last recorded price

Buy on Amazon USA

Also sold in packs

  • Pack of 2$109.44$54.72 per unitBuy
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Featureeufy Security Flood & Freeze Sensor E20Moen Smart Leak DetectorWinner
Price$39.99$54.72eufy Security Flood & Freeze Sensor E20
Rating4.23.3eufy Security Flood & Freeze Sensor E20
Weather ResistanceIP54IP67Moen Smart Leak Detector
Battery Life5 years2 yearseufy Security Flood & Freeze Sensor E20
AlertsWater Leak Alerts, Freeze Temperature Alerts, Low Battery AlertsWater Leak Alerts, Temperature Alerts, Freeze Temperature AlertsMoen Smart Leak Detector
Connectivity2.4 GHz WiFi2.4 GHz WiFiTie
IntegrationsHome AssistantHome AssistantTie
SensorsWater Leak, TemperatureWater Leak, TemperatureTie
On Device Alert SoundYESYESTie
On Device Alert LightYESYESTie

What the differences mean

Hub

The eufy Security Flood & Freeze Sensor E20 needs a compatible eufy HomeBase and has no Wi-Fi of its own. The Moen Smart Leak Detector joins 2.4 GHz Wi-Fi directly.

Battery

The eufy Security Flood & Freeze Sensor E20 is rated for five years. The Moen Smart Leak Detector uses a CR123A rated for about two.

Probe

The eufy Security Flood & Freeze Sensor E20 includes a 1.2 m extension probe for gaps under appliances. The Moen Smart Leak Detector uses a 48-inch remote disc.

Alerts

Both cover water, temperature and freeze; the Moen Smart Leak Detector adds humidity tracking, while the eufy Security Flood & Freeze Sensor E20 focuses on five freeze thresholds.

Weather rating

The Moen Smart Leak Detector is IP67 rated. The eufy Security Flood & Freeze Sensor E20 is IP54, which resists splashes but not immersion.

Which one to buy if

Winner
Eufy

eufy Security Flood & Freeze Sensor E20

Prime exclusive deal
$39.99

Last recorded price

Buy on Amazon USA
  • + Price: $39.99
  • + Rating: 4.2
  • + Battery Life: 5 years
  • - Weather Resistance: IP54 vs IP67
  • - Alerts: Water Leak Alerts, Freeze Temperature Alerts, Low Battery Alerts vs Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts
Moen

Moen Smart Leak Detector

Prime exclusive deal
$54.72

Last recorded price

Buy on Amazon USA
  • + Weather Resistance: IP67
  • + Alerts: Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts
  • - Price: $54.72 vs $39.99
  • - Rating: 3.3 vs 4.2

What owners say

Owners of the Moen Smart Leak Detector describe the core job getting done once it is online: water found early, with alerts reaching a phone by push, text or email. They value the remote sensing disc for sump pits and behind appliances and the built-in temperature and humidity readout that also warns of freezing pipes. The recurring complaints are a setup process many found difficult, missing or unclear pairing instructions, an app that loops during connection, and units that arrived with the protective battery tab not fully removed so the cell was already partly drained. Several say they rely on phone notifications rather than the quiet 51 dB alarm, and some note there is no tilt or tamper sensing.

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.

  • eufy Security Flood & Freeze Sensor E20
  • Moen Smart Leak Detector

Loading price history...

Frequently Asked Questions

Which is better overall: eufy Security Flood & Freeze Sensor E20 or Moen Smart Leak Detector?

Inside an existing eufy Security home, the eufy Security Flood & Freeze Sensor E20, with its five-year battery, extension probe and freeze thresholds. For a hub-free install with humidity and temperature trends and an IP67 body, the Moen Smart Leak Detector is the better fit.

Does the eufy Security Flood & Freeze Sensor E20 need a hub?

Yes. The eufy Security Flood & Freeze Sensor E20 talks to a compatible eufy HomeBase and has no Wi-Fi radio of its own, while the Moen Smart Leak Detector joins 2.4 GHz Wi-Fi directly.

How long does the battery last in the eufy Security Flood & Freeze Sensor E20 and the Moen Smart Leak Detector?

The eufy Security Flood & Freeze Sensor E20 is rated for five years on a CR123A, while the Moen Smart Leak Detector is rated for about two years.

Do these sensors warn about freezing pipes?

Both do. The eufy Security Flood & Freeze Sensor E20 offers five freeze thresholds, and the Moen Smart Leak Detector adds humidity tracking alongside its freeze and temperature alerts.

Who should buy the eufy Security Flood & Freeze Sensor E20?

Existing eufy HomeBase owners who want a long-lived sensor with a slim probe for use under a fridge, sink or washing machine.

Who should buy the Moen Smart Leak Detector?

Buyers who want no hub, an IP67 sensor, temperature and humidity trends, and a remote sensing disc for a sump pit or tight space.

Full comparison table

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