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Last updated October 2026

Aqara Water Leak Sensor

A compact, long-lasting Zigbee leak detector that owners trust to catch drips fast, though it leans hardest into the Aqara and Apple HomeKit ecosystem.

4.2
3,657 ratings
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Launch Year: 2020

Model: SJCGQ11LM

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Official bundles

Bundles with Aqara Water Leak Sensor

  • Aqara Water Leak Sensor 3-Pack + Hub M100 Kit

    Aqara Water Leak Sensor 3-Pack + Hub M100 Kit

    3 × Aqara Water Leak Sensor + Aqara Hub M100

    $63.17

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Our review

Aqara Water Leak Sensor Review: A Tiny Zigbee Guardian for Sinks, Washing Machines and Water Heaters

The verdict

The Aqara Water Leak Sensor is a small, battery-powered Zigbee sensor that buyers repeatedly praise for its discreet size, quick leak detection, and long battery life, making it a popular pick for placement under sinks, behind washing machines, and near water heaters. It fits most naturally into an Aqara Hub or Apple HomeKit setup, and while many Home Assistant users report success pairing it directly via Zigbee2MQTT or ZHA, others found a hub was effectively required to get a stable connection. It is a strong, affordable choice for anyone building out leak detection in an Aqara, HomeKit, or Zigbee-based smart home, less so for shoppers wanting native Alexa, Google Home, SmartThings, or Matter support out of the box.

Best for
  • Aqara ecosystem and Apple HomeKit households
  • Home Assistant users comfortable with Zigbee2MQTT or ZHA
  • Under-sink, washing machine and water heater leak monitoring
  • Budget-conscious buyers wanting a small, discreet sensor

Pros

  • Very small, discreet size fits tight spaces like under sinks
  • Fast, reliable water-leak detection
  • Long battery life on a single CR2032 cell
  • IP67 weather resistance
  • Works well with Home Assistant, IFTTT and automations

Cons

  • No native Alexa, Google Home, SmartThings or Matter support
  • Apple HomeKit and Matter require an Aqara Hub
  • Non-Aqara Zigbee hubs can see inconsistent pairing or disconnects
  • No temperature sensing, tamper alert, or on-device alert sound/light
  • A small share of buyers report a defective unit or seal failure over time

Who is the Aqara Water Leak Sensor for?

This sensor is built for smart home owners who want an unobtrusive, always-on leak watchdog in tight spots, buyers describe tucking it under sinks, behind washing machines, near water heaters, inside fish tanks, and even in camper vans. Its small, low-profile design (just 50 x 50 x 15 mm) is one of the most repeated compliments, since it disappears into cupboards and cramped spaces rather than getting in the way. It communicates over Zigbee and needs a Zigbee hub or coordinator, most commonly an Aqara Hub, though several reviewers pair it straight into Home Assistant using a Zigbee2MQTT or ZHA-based USB coordinator without an Aqara hub in the loop.

What buyers love

The recurring praise centers on speed and reliability of leak detection, several owners describe the alarm firing within a second of contact with water, which lines up with the sensor's supported water-leak alert feature. Long battery life on a single CR2032 cell is another frequent highlight, with some owners reporting two or more years on the original battery, matching the roughly 2-year rated battery life. Buyers also like that it plugs into automations beyond simple leak alerts, using it to trigger pumps to shut off, build DIY presence sensors, or feed IFTTT routines, reflecting the device's supported automations and IFTTT integration. Its IP67 weather resistance and CR2032 sensor cable-free contacts also get called out as reliable even when directly exposed to water.

What to know before you buy

The sensor has no Alexa or Google Home support per its spec sheet, and Apple HomeKit, Samsung SmartThings and Matter work only through an Aqara Hub; this hub requirement catches some buyers off guard, especially SmartThings or HomeKit-only households that assumed the sensor would work standalone. A few reviewers who tried pairing directly to third-party Zigbee hubs report inconsistent behavior, since Aqara's Zigbee implementation does not always follow the standard fully. There is no on-device alert sound, alert light, tamper alert, or temperature sensing, this is a leak-and-battery-alert device only, not a multi-sensor unit. A small number of buyers reported a defective unit or a failed water seal over time, so pairing it with a hub's own low-battery and connectivity alerts is worth doing for peace of mind.

Is the Aqara Water Leak Sensor worth it?

For its low price and long track record (thousands of reviews and a strong average rating), this is one of the more established Zigbee leak sensors on the market, and the balance of praise around detection speed, size and battery life against complaints about hub requirements and occasional connectivity quirks tilts clearly positive for anyone already in the Aqara, HomeKit or Home Assistant ecosystem. Buyers wanting turnkey Alexa or SmartThings support without any extra hub should look elsewhere, but for the intended audience it delivers strong value.

Frequently asked questions

Does the Aqara Water Leak Sensor need a hub?

It communicates over Zigbee and needs a Zigbee coordinator to work. It pairs most reliably with an Aqara Hub, and Apple HomeKit and Matter access specifically require one, though many Home Assistant users connect it directly through a Zigbee2MQTT or ZHA USB coordinator.

Does it work with Alexa or Google Home?

Per its spec sheet it does not have native Alexa or Google Home support, while Samsung SmartThings and Matter work only through an Aqara Hub.

How long does the battery last?

It runs on a single CR2032 battery rated for about 2 years of normal use, and several long-term owners report going well beyond that on the original battery.

Is the Aqara Water Leak Sensor waterproof?

It carries an IP67 weather-resistance rating, so it is built to handle direct contact with water and light submersion.

Does it detect temperature or just water?

It is a dedicated water-leak sensor only. It does not include a temperature sensor, tamper alert, or on-device alert sound or light, notifications come through your Zigbee hub or app.

Company
Aqara logo

Aqara

4.0/ 5 avg ratingChina flagHeadquartered in China

Aqara makes a broad and affordable range of smart home devices, including sensors, smart locks, cameras, switches and its own hubs. The brand is known for strong support of Apple HomeKit, Matter and Zigbee, making its products a favorite for users mixing ecosystems. Aqara hubs let inexpensive Zigbee sensors bridge into HomeKit, Alexa and Google Home.

Full specifications

Every spec, organized

Browse the full breakdown by category. Tap the on any row for what it means, or the for sources and documentation.

Weather Resistance

IP67

Dimensions

2 × 2 × 0.6 in 50 × 50 × 15 mm

Weight

0.6 oz 18 g

Sensor Cable

NO

Wired

NO

Battery Type

CR2032

Battery Life

2 years

The sensor is also energy efficient and one battery can last over 2 years under normal usage.

2.4 GHz WiFi

NO

5 GHz WiFi

NO

Bluetooth

NO

Z-Wave

NO

Zigbee

Zigbee Hub required

Thread Protocol

NO

Other

NO

Google Home

NO

Alexa

NO

Alexa has no water leak sensor type: the Matter Water Leak Detector has no Alexa capability mapping, and bridges such as SmartThings or Home Assistant cannot expose a moisture sensor either

Apple HomeKit

Aqara Hub required

Samsung SmartThings

Aqara Hub required

SmartThings accepts Matter bridges and the Water Leak Detector device type, so the sensor reaches it through an Aqara hub that bridges it to Matter.

Home Assistant

YES

Matter

Aqara Hub required

Aqara Hub M2 and M3 firmware added leak sensors to their Matter bridge, so the sensor reaches Matter through one of those hubs.

Water Leak

YES

Temperature

NO

Tilt

NO

Water Leak Alerts

YES

When the water level reaches up to 0.5mm, the Water Leak Sensor will trigger the Hub to sound an alarm and send a notification to your phone.

Temperature Alerts

NO

Freeze Temperature Alerts

NO

Low Battery Alerts

YES

Tamper Alerts

NO

On Device Alert Sound

NO

On Device Alert Light

NO

Automations

YES

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Required to work

You need a Zigbee hub for this

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Why it needs a Zigbee coordinator

The Aqara Water Leak Sensor speaks Zigbee, not Wi-Fi. On its own it cannot reach your phone, your voice assistant or any automation: it needs a Zigbee coordinator to join. These are the ones in our catalog that can run it.

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