Water Leak Sensors · Head to head

Eve Water Guard vs Heiman Smart Water Leakage Sensor

Full Smart Water Leak Sensors comparison in 2026

Updated October 2026
Data from Amazon and official Eve and Heiman sites.
2026 verdict
Buy the Heiman Smart Water Leakage Sensor when a battery puck on Wi-Fi fits better than a mains-powered sensing cable.
Heiman Smart Water Leakage Sensor
Winner
Heiman Smart Water Leakage Sensor
$16.99$19.9915% OFFPrime exclusive deal

Last recorded price

Buy on Amazon USA
As a water leak sensor it runs up to 5 years on a CR123A, lists 2.4 GHz Wi-Fi, IP67, a siren, a light, Home Assistant and automations. The Eve Water Guard is the coverage play: a supplied 6.5 ft sensing cable you can extend toward 490 ft, Thread plus Bluetooth, native Apple Home, and a 100 dB siren, but it has to stay plugged in. Choose the Heiman Smart Water Leakage Sensor for a spot you can leave on a battery, and the Eve Water Guard to trace a whole appliance run in HomeKit.
Eve Water Guard
Eve

Eve Water Guard

9% OFF
Prime exclusive deal
$99.95
$109.95
38% above its lowest price of the last 6 months ($72.19)
18% above its lowest price of the last 6 months (€74.23)

Last recorded price

Buy on Amazon USA

Also sold in packs

  • Pack of 29% OFF$199.90$219.90$99.95 per unitBuy
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FeatureEve Water GuardHeiman Smart Water Leakage SensorWinner
Price$99.95$16.99Heiman Smart Water Leakage Sensor
Rating4.64.2Eve Water Guard
ConnectivityBluetooth, Thread ProtocolOtherEve Water Guard
IntegrationsApple HomeKit, Home AssistantNoneEve Water Guard
SensorsWater LeakWater Leak, TemperatureHeiman Smart Water Leakage Sensor
AlertsWater Leak AlertsWater Leak Alerts, Freeze Temperature Alerts, Low Battery AlertsHeiman Smart Water Leakage Sensor
Weather ResistanceYESIP67Tie
Warranty1 year1 yearTie
On Device Alert SoundYESYESTie
On Device Alert LightYESYESTie

What the differences mean

Cable versus a spot

The Eve Water Guard ships with a 6.5 ft sensing cable, extendable up to about 490 ft, so one unit can follow a sink, fridge and dishwasher. The Heiman Smart Water Leakage Sensor has no cable. It detects water only where the puck sits.

Power

The Eve Water Guard is mains powered, so there is no battery to replace and nowhere to put it far from an outlet. The Heiman Smart Water Leakage Sensor is a CR123A puck rated for 5 years. A low-battery alert applies to the Heiman and does not apply to the wired Eve.

HomeKit and Thread

The Eve Water Guard lists Apple Home, Bluetooth and Thread, with a border router required for Thread, and Matter is listed as coming rather than available. The Heiman Smart Water Leakage Sensor does not list Apple Home or Thread. It lists 2.4 GHz Wi-Fi, Home Assistant and partial SmartThings. Google Home is not documented on the Heiman.

What else they sense

Both are water-only sensors with a siren and a light. Neither lists temperature or freeze alerts. The Eve write-up rates the siren at 100 dB and the Heiman notes at 75 dB, so the Eve is the louder of the two on the page each product already publishes.

Which one to buy if

Eve

Eve Water Guard

9% OFF
Prime exclusive deal
$99.95
$109.95

Last recorded price

Buy on Amazon USA
  • + Rating: 4.6
  • + Connectivity: Bluetooth, Thread Protocol
  • + Integrations: Apple HomeKit, Home Assistant
  • - Price: $99.95 vs $16.99
  • - Sensors: Water Leak vs Water Leak, Temperature
Winner
Heiman

Heiman Smart Water Leakage Sensor

15% OFF
Prime exclusive deal
$16.99
$19.99

Last recorded price

Buy on Amazon USA
  • + Price: $16.99
  • + Sensors: Water Leak, Temperature
  • + Alerts: Water Leak Alerts, Freeze Temperature Alerts, Low Battery Alerts
  • - Rating: 4.2 vs 4.6
  • - Connectivity: Other vs Bluetooth, Thread Protocol

What owners say

Owners are not describing the same product. Eve Water Guard owners talk about scanning it into the Home app with no extra account, a siren and light that caught a toilet, a roof leak or a washer drip, and one cable covering a kitchen run instead of several pucks. They also call it expensive, note that it needs a wall outlet, and a few report units that stopped detecting or took time to connect. Heiman Smart Water Leakage Sensor owners stay on the local alarm: twist off the cover, fit the battery, and it sounds when the contacts get wet, even before any gateway is involved. Their complaint is that app alerts wanted a gateway the single-sensor box did not always include.

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.

  • Eve Water Guard
  • Heiman Smart Water Leakage Sensor

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Frequently Asked Questions

Which is better overall: Eve Water Guard or Heiman Smart Water Leakage Sensor?

The Heiman Smart Water Leakage Sensor as a battery water leak sensor with listed Wi-Fi, a siren and Home Assistant. The Eve Water Guard is the better fit for Apple Home households that can plug in a sensing cable and want one device to cover a long run.

What is the biggest difference between the Eve Water Guard and the Heiman Smart Water Leakage Sensor?

Coverage and power. The Eve Water Guard uses a 6.5 ft cable, extendable up to about 490 ft, and must stay on mains power. The Heiman Smart Water Leakage Sensor is a battery spot sensor on 2.4 GHz Wi-Fi, rated for 5 years.

Does the Eve Water Guard work with Apple Home, and does the Heiman Smart Water Leakage Sensor?

The Eve Water Guard lists Apple Home and Thread, and Matter is marked as coming. The Heiman Smart Water Leakage Sensor does not list Apple Home. It lists Home Assistant and partial SmartThings instead.

Which one can run without a wall outlet?

The Heiman Smart Water Leakage Sensor. It uses a CR123A rated for 5 years. The Eve Water Guard is wired only, so placement stops where the cord stops.

Who should buy the Eve Water Guard?

Apple Home or Thread households that want a loud cable sensor along a kitchen or laundry run and have an outlet nearby.

Who should buy the Heiman Smart Water Leakage Sensor?

Anyone who wants a sealed battery puck with a local alarm and listed Wi-Fi, and who is protecting one spot rather than a whole counter run.

Full comparison table

Compare all 34 Water Leak Sensors side by side

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  • 36 specs compared
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