*A Zigbee gateway is needed.
SONOFF SenseGuard DW Gen2 Zigbee Smart Door/Window Sensor | SNZB-04PR2
Tax included. Shipping calculated at checkout
Ideal as a security door sensor for long-term home protection.
Technical details, troubleshooting or setup tips? Access the SenseGuard DW Gen2 knowledge center for all the info you need.
Slim by Design, Strong on Security.
SenseGuard DW Gen2- Zigbee Door and Window Sensor
Size Shrinked, Performance Advanced
Flexiable Installtion to Fit More Doors & Windows
30mm Detection Range
Works well with a wide gap!
Vertical Magnet Mounting
Ideal for doors and frames with height differences
Detachable Magnet Design
No worries about tight or unconventional spots.
Note: The detection range is 30mm when the magnet is installed horizontally, 15mm when installed vertically.
Intrusion Detected, Protection Activated
If 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.
Check the Tamper Status Anytime via App
Also A Companion for Energy Saving！
Use door and window status over time as a smart trigger—so your devices such as a thermostat turn off automatically when windows are left open, saving energy without extra effort.
Turn off the thermostat in time
Never left the light on
Guard More Than Doors & Windows
Check the Sensor Status via Voice
*Note: This function requires adding the device to the eWeLink app and syncing it to third-party platforms via cloud-to-cloud integration;
This process does not involve direct connection to the third-party gateway.
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.
*Currently, using the SenseGuard DW Gen2 with ZHA requires the script. For detailed instructions, please refer to: https://help.sonoff.tech/docs/SNZB-04PR2.
Zigbee Hub Compatibility
*ZB-Bridge only supports open/close status and battery reporting.
Currently you need a script to add the device to ZHA. Please check https://help.sonoff.tech/docs/SNZB-04PR2.
Currently you need a script to support the tampers status feature in SmartThings. Please check https://help.sonoff.tech/docs/SNZB-04PR2.
*Matter Bridge: ZBBridge-U, iHost, Cube OS with SONOFF Zigbee Dongle
Specification
Package
Specs & User Manual
SenseGuard DW Gen2 is a mini door and window contact sensor designed for versatile installation on various door and window types, supporting both horizontal and vertical mounting. Powered by standard AAA batteries, it ensures cost-effective, long-term use. The SNZB-04PR2 smart magnetic door open sensor features anti-tamper detection, sending instant app alerts, and triggering smart scenes when abnormal removal is detected. Its slim, lightweight design blends seamlessly into any home, enabling smart automation for enhanced home security and everyday comfort.
User Manual (PDF)Product name
SenseGuard DW Gen2
Product series
SenseGuard series
Model
SNZB-04PR2
MCU
TLSR8656F512ET32
Input
3V⎓
Battery model
LR03 AAA*2
Zigbee
IEEE 802.15.4
Net weight
45.1g (Includes battery)
Product dimension
Transmitter: 90*26*13.5mm
Magnet: 31*14*6.5mm
Casing material
PC
Working temperature
-10℃~60℃
Working humidity
5%~95% RH, non-condensing
FAQ
1. How does the 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 a 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 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 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 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 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 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.