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Last updated November 2026

Centralite 3-Series Water Sensor

A matchbox-size Zigbee leak and temperature sensor that hooks into SmartThings and Home Assistant with ease, held back by inconsistent battery life.

3.8
150 ratings
25% OFF
$19.95
$14.95
As an Amazon Associate I earn from qualifying purchases
Launch Year: 2017

Model: 3315-C

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Our review

Centralite 3-Series Water Sensor Review: A Budget Zigbee Leak Sensor That Pairs Easily With SmartThings

The verdict

The Centralite 3-Series Water Sensor is a small, low-cost Zigbee leak detector that pairs smoothly with Samsung SmartThings and Home Assistant, and owners repeatedly credit it with catching sump pump failures and appliance leaks before they became expensive problems. Its main weakness is inconsistent battery life, several long-term owners report the CR2 battery draining far faster than expected and occasional dropped connections that require re-pairing. It suits SmartThings and Zigbee households wanting an affordable, no-frills leak-and-temperature sensor, but is not the pick for buyers who prioritize long, worry-free battery life above all else.

Best for
  • Samsung SmartThings households
  • Home Assistant and Zigbee hub users
  • Sump pump and appliance leak monitoring
  • Budget-focused buyers

Pros

  • Fast, accurate water-leak detection
  • Easy pairing with Samsung SmartThings
  • Compact, matchbox-size body fits tight spaces
  • Built-in temperature and freeze-temperature alerts
  • Budget-friendly compared to similar sensors

Cons

  • Several owners report faster-than-expected battery drain
  • Occasional disconnects that require re-pairing
  • No Alexa, Google Home, Apple HomeKit, IFTTT or Matter support
  • No tamper alert or on-device alert sound/light
  • Requires a Zigbee hub to operate

Who is the Centralite 3-Series Water Sensor for?

This sensor targets Zigbee smart home owners, especially Samsung SmartThings users, who want an inexpensive way to catch leaks before they cause real damage. Buyers describe placing it near sump pumps, water heaters, and behind appliances, with several specifically using it as a backup alert in case a primary sump pump fails. Its compact, matchbox-size body (about 1.5 x 2.3 in and under an inch thick) makes it easy to tuck into tight spaces, and it pairs under the Centralite brand name directly in the SmartThings app, with some owners also running it through Wink Hub or Zigbee2MQTT on Home Assistant.

What buyers love

The most common praise is for fast, accurate leak detection, several reviewers say alerts fired immediately when water was detected, which matches the device's supported water-leak and freeze-temperature alert features. Ease of pairing with Samsung SmartThings comes up repeatedly as a strength, with owners calling setup as simple as placing the sensor and letting the app find it. Buyers also value the built-in temperature sensor alongside leak detection, and several note it costs meaningfully less than competing sensors with similar functionality.

What to know before you buy

Battery life is the sensor's most consistent complaint: despite a 3-year rated battery life on its CR2 cell, multiple long-term owners report the battery draining unusually fast, sometimes needing replacement within months, with connection drops as the battery level falls. A couple of reviewers also describe having to force-remove and re-pair the device after a battery swap, particularly on Zigbee2MQTT setups. The sensor has no direct Alexa, Google Home, Apple HomeKit, IFTTT or Matter support, it works through Zigbee with a compatible hub, and it lacks a tamper alert or on-device alert sound and light, so notifications rely entirely on your hub or app.

Is the Centralite 3-Series Water Sensor worth it?

At its low price point, this sensor delivers on the core promise, fast and accurate leak and temperature alerts with easy SmartThings and Home Assistant pairing, which is why many owners say it already paid for itself by catching a leak early. The trade-off is battery reliability that some owners find frustrating over the long run, so it is a sound budget pick for SmartThings or Zigbee users who do not mind occasionally checking battery levels, rather than a set-and-forget sensor for years at a time.

Frequently asked questions

Does the Centralite 3-Series Water Sensor work with SmartThings?

Yes, it is explicitly supported by Samsung SmartThings and pairs directly under the Centralite brand name in the SmartThings app. It also supports Home Assistant.

Does it work with Alexa or Google Home?

No. It does not have native Alexa, Google Home, Apple HomeKit, IFTTT or Matter support per its spec sheet.

How long does the battery last?

It is rated for about 3 years on a single CR2 battery, though several long-term owners report needing to replace the battery sooner than expected.

Does the sensor need a hub?

Yes, it connects over Zigbee and needs a Zigbee-compatible hub, it has no Wi-Fi, Bluetooth, Z-Wave or Thread radio of its own.

Does it detect temperature as well as water leaks?

Yes, it includes both water-leak and temperature sensing, with water-leak, temperature and freeze-temperature alerts, plus low-battery alerts.

Company
Centralite logo

Centralite

3.8/ 5 avg ratingUSA flagHeadquartered in USA

Centralite is a US manufacturer of Zigbee smart home devices, including smart plugs, sensors and thermostats, and has built hardware for other smart home platforms. Its products are commonly used with hubs like SmartThings and Hubitat. Centralite is recognized for dependable Zigbee accessories aimed at DIY home automation.

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

?

Dimensions

1.5 × 2.3 × 0.9 in 38 × 59 × 22 mm

Weight

1.6 oz 45 g

Sensor Cable

NO

Wired

NO

Battery Type

CR2

Battery Life

3 years

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

NO

Samsung SmartThings

YES

Home Assistant

YES

Matter

NO

Water Leak

YES

Temperature

YES

Tilt

NO

Water Leak Alerts

YES

Temperature Alerts

YES

Freeze Temperature Alerts

YES

Low Battery Alerts

YES

Tamper Alerts

NO

On Device Alert Sound

NO

On Device Alert Light

NO

Automations

YES

Local Control

YES

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Required to work

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Why it needs a Zigbee coordinator

The Centralite 3-Series Water 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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