Sonoff Zigbee Door/Window Sensor SNZB-04PR2

SONOFF SNZB-04PR2 SenseGuard DW Gen2 – Zigbee 3.0 Smart Door & Window Sensor

Know When Doors & Windows Open, Wherever You Are

Monitor doors, windows, drawers, cabinets, and other entry points with the SONOFF SNZB-04PR2. This compact Zigbee door/window sensor provides reliable open/close detection, active tamper alerts, smart automation, and up to 3 years of battery life.

✔ Zigbee 3.0 Smart Door & Window Sensor
✔ Active Anti-Tamper Detection
✔ Standard AAA Battery Power – Up to 3 Years
✔ Slim & Discreet Gen2 Design
✔ Horizontal & Vertical Installation
✔ Up to 30mm Detection Range*

Built for smart home security, energy-saving automation, and everyday convenience.

*Detection range is up to 30mm with horizontal magnet installation and 15mm with vertical installation.

Smarter Door & Window Monitoring Without the Complexity

A door or window can be opened without you noticing, a light can be left running, or a room can continue heating or cooling while a window remains open.

The SONOFF SNZB-04PR2 SenseGuard DW Gen2 turns these everyday situations into smart automation opportunities. Its magnetic sensor detects when a door or window opens or closes, allowing your connected smart home system to respond automatically.

With active anti-tamper detection, the sensor can also alert you when someone attempts to remove or interfere with it. Its slim design, flexible mounting options, and standard AAA batteries make it practical for long-term installation throughout your home.

Whether you're monitoring an entry door, bedroom window, refrigerator, drawer, safe, baby gate, or pet door, the SNZB-04PR2 gives your smart home another reliable layer of awareness.

Why Choose the SONOFF SNZB-04PR2?

Choosing a smart door and window sensor is about more than simply detecting an open door. Easy installation, battery convenience, automation capability, and reliable integration all matter.

SONOFF combines:

Reliable Zigbee 3.0 open/close detection for everyday smart home monitoring

Active tamper detection with app alerts and automation support

Standard AAA battery power with up to 3 years of battery life

Slim 45.1g design that stays discreet on doors and windows

Flexible horizontal or vertical installation for different frame configurations

Compatibility with supported SONOFF Zigbee hubs and open-source smart home platforms

Every feature is designed to make smart home security, automation, and monitoring easier to manage without adding unnecessary complexity.

Why SONOFF SNZB-04PR2 Compared to Standard Door Sensors

The Difference You Notice Immediately

 Know When an Entry Point Changes

Receive door and window status updates and use them to trigger smart lights, alarms, cameras, or other connected devices.

 Add an Extra Layer of Awareness

Active tamper detection can notify you when the sensor is removed or disturbed, helping you stay informed about unexpected interference.

 Automate Your Home Around Real Activity

Use door and window status as a smart trigger. For example, turn lights on when a door opens or adjust climate control when a window remains open.

 Reduce Unnecessary Energy Use

Create automations that respond when doors or windows stay open, such as turning off connected thermostats to help avoid unnecessary heating or cooling.

 Install It Where You Need It

Horizontal and vertical mounting options make the sensor suitable for different door and window frames, including installations with wider gaps or height differences.

Premium Features

How to Use the SONOFF SNZB-04PR2

Using the SNZB-04PR2 is straightforward:

Install two AAA batteries into the sensor.

Pair the sensor with a compatible Zigbee 3.0 gateway or coordinator.

Mount the sensor and magnet on the selected door, window, drawer, cabinet, or other suitable location.

Position the magnet correctly according to your chosen horizontal or vertical installation.

Create smart automations through your compatible platform.

Use open/close or tamper events to trigger lights, alerts, alarms, cameras, climate controls, or other connected devices.

For Home Assistant, the device can be integrated using a compatible SONOFF Dongle with ZHA or Zigbee2MQTT. ZHA currently requires a script for this model, so check the latest SONOFF integration instructions before installation.

Who Is It For?

The SONOFF SNZB-04PR2 is ideal for:

Smart home owners

Home Assistant users

Zigbee and Zigbee2MQTT users

Home security setups

DIY smart home builders

Families monitoring doors and windows

Users wanting automated lighting and climate control

Property owners looking for discreet entry-point monitoring

Anyone wanting to expand an existing SONOFF Zigbee ecosystem

It is also suitable for monitoring baby safety gates, pet doors or cages, medicine cabinets, drawers, refrigerators, safes, and other areas where open/close monitoring is useful.

Compatibility & Installation Information

The SNZB-04PR2 requires a compatible Zigbee 3.0 gateway or coordinator for operation.

Supported integration options include compatible SONOFF Zigbee hubs and SONOFF Dongle-based setups for open-source platforms such as Home Assistant. ZHA currently requires a script for this model, while compatibility and supported features can vary by hub.

For the most accurate compatibility information, always check the supported hub list and current integration instructions before purchase.

Specifications

Frequently Asked Questions

What does the SONOFF SNZB-04PR2 detect?

It detects the relative position of the sensor and magnet to determine whether a door, window, drawer, cabinet, or other monitored item is open or closed.

Does the SNZB-04PR2 have tamper detection?

Yes. Active tamper detection can identify when the sensor is removed or disturbed and can trigger app alerts or smart automation actions.

How long do the batteries last?

The sensor uses two standard AAA batteries and supports up to 3 years of battery life, depending on usage and operating conditions.

Does it work with Home Assistant?

Yes, with a compatible SONOFF Dongle and supported Home Assistant integration. For ZHA, SONOFF currently requires a script for the SNZB-04PR2.

Can I install it vertically?

Yes. The SNZB-04PR2 supports both horizontal and vertical magnet mounting. The stated detection range is up to 30mm horizontally and 15mm vertically.

Do I need a Zigbee hub?

Yes. A compatible Zigbee gateway or coordinator is required to use the sensor as part of a smart home system.

Can it be used for things other than doors and windows?

Yes. SONOFF lists applications including baby gates, pet doors or cages, medicine cabinets, drawers, refrigerators, safes, and other suitable locations.

Make Every Door and Window Part of Your Smart Home

Whether you're monitoring an entrance, automating your lighting, reducing unnecessary energy use, or adding another layer of awareness to your home security setup, the SONOFF SNZB-04PR2 SenseGuard DW Gen2 gives you a practical way to turn everyday opening and closing events into intelligent actions.

With Zigbee 3.0 connectivity, active tamper detection, up to 3 years of AAA battery life, flexible mounting, and a slim Gen2 design, it's built for smart homes that need reliable monitoring without unnecessary complexity.

Add the SONOFF SNZB-04PR2 to your Zigbee setup and turn everyday door and window activity into smarter, more responsive automation.