Smart wireless ZigBee door / window sensor Gen2, SNZB-04PR2, SONOFF
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Product description
Reliable Door and Window Monitoring for Smarter Home Security
The SONOFF SenseGuard DW Gen2 (SNZB-04PR2) is a Zigbee door and window sensor designed to provide accurate open and close monitoring for modern smart homes. The sensor helps improve security, automate daily routines, and increase energy efficiency by detecting the status of doors, windows, cabinets, and other access points in real time. Thanks to its compact design, tamper protection, flexible installation options, and Zigbee connectivity, SNZB-04PR2 integrates seamlessly into a wide range of smart home environments. The sensor can trigger automations, activate lighting, send instant notifications, and work together with other smart devices to create a more responsive and secure home experience.
Key Features
- Real-time door and window open/close monitoring.
- Built-in tamper detection with instant alerts.
- Flexible horizontal and vertical installation options.
- Supports smart scene automation and security triggers.
- Compact and discreet design suitable for most doors and windows.
- Powered by easily replaceable AAA batteries.
- Zigbee connectivity for reliable smart home integration.
- Compatible with SONOFF Zigbee gateways, Home Assistant, Alexa, and SmartThings when used with a compatible hub.
Reliable Intrusion Detection, Enhance Home Security
Smart door & window sensors deliver reliable intrusion detection. When forced open, SenseGuard DW Gen2 instantly triggers automation to set your entire home defense in motion — the gateway switches to armed mode, alarms sound, and cameras start recording automatically, enhancing home security.
Check the Tamper Status Anytime via App
Saving Energy with Smart Door Window Contact Sensor
Use door and window status over time as a smart trigger — If a door or window stays open for a set time, connected devices like thermostats can turn off automatically, saving energy without extra effort.
Guard More Than Doors & Windows
Check the Sensor Status via Voice
Works with Apple Home Via Matter Bridge
All solutions integrate SONOFF Zigbee devices into your Apple ecosystem via Matter Bridge, enabling seamless interconnected device control.
Learn More about ZBBridge-U | Learn More about eWeLink CUBE
Easily Integrates with Open-Source Platforms
Integrate SenseGuard DW Gen2 into Home Assistant open-source platform with SONOFF Dongle Series.
Zigbee Hub Compatibility
Ideal for Security, Automation, and Energy Saving
The SNZB-04PR2 can be used in a wide variety of automation scenarios. Receive instant notifications when a door or window is opened, activate lights automatically when entering a room, trigger camera recording when unauthorized access is detected, or create reminders for doors and windows left open for extended periods. These automation capabilities help improve comfort, strengthen security, and reduce unnecessary energy consumption.
Technical Specifications
| Parameter | Value |
|---|---|
| Product Name | SenseGuard DW Gen2 |
| Product Series | SenseGuard Series |
| Model | SNZB-04PR2 |
| MCU | TLSR8656F512ET32 |
| Input Voltage | 3V DC |
| Battery Type | 2 × LR03 (AAA) |
| Wireless Protocol | Zigbee IEEE 802.15.4 |
| Net Weight | 45.1 g (including batteries) |
| Transmitter Dimensions | 90 × 26 × 13.5 mm |
| Magnet Dimensions | 31 × 14 × 6.5 mm |
| Housing Material | PC |
| Operating Temperature | -10°C to +60°C |
| Operating Humidity | 5%–95% RH (non-condensing) |
Frequently Asked Questions (FAQ)
1. How does the SONOFF smart Door Window Sensor work?
The door window sensor works by detecting the proximity and separation between the transmitter and magnet to determine the door/window's open/close status. Its open/close and tamper statuses are mainly used to trigger smart automations, such as turning on lights, activating alarms, or starting camera recording for home security.
2. How to install SONOFF smart door and window sensor?
There are 3 steps to install door or window sensor:
Step 1: Apply the 3M adhesive to the designated area on the door detector sensor.
Step 2: Align the alignment mark on the transmitter and the magnet as closely as possible.
Step 3: Attach the transmitter and the magnet to the door or window frame.
*Note: The magnet can be installed horizontally or vertically, and can be removed and installed separately when space is limited.
3. How many smart door window contact sensors do I need?
The number of door and window contact detectors you need depends on what you want to monitor.
In addition to doors and windows, the smart sensor can be used on baby safety gates, pet doors or cages, medicine cabinets, drawers, refrigerators, safes, and more.
4. How does the SONOFF smart door window sensor detect the door or window status?
The sensor detects the relative distance between the main sensor and the magnet. When they are separated or brought close together, it changes the state between "open" and "closed".
5. Can the SONOFF door/window sensor that sends alerts to your phone notify you when the door/window is opened?
Of course! Please remember to turn on the 'Push Notification' in the device's setting page.
6. What is the SONOFF smart tamper-proof feature of door window sensors?
The sensor has a tamper alarm that triggers if someone tries to remove or tamper with the device, sending an alert to the app or triggering automation actions.
7. What type of battery does the SONOFF smart door/window open sensor use, and how long does it last?
The device uses 2 AAA batteries and supports a 3-year battery life.
8. How to integrate the SONOFF smart door/window sensor into open-source platforms?
You need SONOFF Dongle Series to add the device to ZHA or Z2M. Currently, you need a script for ZHA. Please refer to https://help.sonoff.tech/docs/SNZB-04PR2 (Key Features >> Compatible Zigbee Hub List) for the script and instruction.