SONOFF SenseGuard DW Gen3 Zigbee & Thread Smart Door/Window Sensor | SNZT-04P
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【Native Thread, Seamless Matter Integration】Supports Thread for seamless integration with major Matter ecosystems, including Apple Home. Low-power operation and direct local Mesh connectivity deliver lower latency and more responsive, reliable performance.
【Two AAA Batteries, Easy and Affordable Replacement】Powered by two AAA batteries, it offers convenient replacement without proprietary batteries or complicated disassembly, keeping long-term running costs low.
【Flexible Installation for Various Gaps】Supports horizontal and vertical installation, accommodating narrow spaces, wide gaps, and height differences between doors or windows for greater installation flexibility.
【Tamper Detection with Instant Alerts】Detects forced removal and immediately sends alerts through the app, helping you stay informed of potential security issues.
【Smart Triggers for Security and Daily Routines】Triggers smart scenes across your home, linking cameras and alarms for security or lights, thermostats, and water heater switches for everyday automation.
Technical details, troubleshooting or setup tips? Access the SenseGuard DW Gen3 (SNZT-04P) knowledge center for all the info you need.
Low power, Matter ready—that’s the Thread of it.
SenseGuard DW Gen3—Smart Door/Window Sensor
Smaller Size, Greater Performance
Perfectly Compatible with the Matter Ecosystem
This product features Matter's officially certified Thread low-power mesh networking protocol, with an energy-saving design supporting up to 15 months of battery life. When paired with a Thread edge router, it seamlessly integrates into the Matter ecosystem without requiring a separate gateway, and is compatible with mainstream platforms such as Apple Home, Google Home, and Alexa.
Works Perfectly with Apple Ecosystem
— Fully Supports Siri, iPhone, iPad and Apple Watch.
Thread Setup Made Easy
- Thread mode: Supports Matter OTA.
- Zigbee mode: Supports OTA via SONOFF gateway, ZHA, or Z2M.
- Quick OTA: Triple-press the device button, then go to eWeLink App > Profile > Pilot Features > Bluetooth OTA Update.
* Devices with firmware below v1.0.7 do not support Zigbee OTA. Please upgrade the firmware via Quick OTA first.
Flexible Installation 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.
Intrusion Detected, Protection Activated
When forced open, SenseGuard DW Gen3 can instantly trigger automations 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 the 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 Leave the Lights On
Gateway Compatibility
Feature Overview
Easily Integrates with Open-Source Platforms
Integrate SenseGuard DW Gen3 into Home Assistant open-source platform with SONOFF Dongle Series.
Guard More Than Doors & Windows
Specification
Package
Specs & User Manual
SenseGuard DW Gen3 (SNZT-04P) is a door and window sensor supporting both Zigbee and Matter over Thread, enabling seamless integration with major smart home ecosystems, including Apple Home. Powered by two AAA batteries, it offers easy replacement and low maintenance costs. Flexible horizontal and vertical installation accommodates various gaps and mounting spaces. Tamper detection triggers instant app alerts if the device is forcibly removed, enhancing home security. It also acts as a smart trigger for security devices, lighting, thermostats, and water heater switches, enabling convenient everyday automation.
User Manual (PDF)SenseGuard Series
Smart Door/Window Sensor
SNZT-04P
TL3238
3V⎓ (2 × 1.5V batteries)
LR03 AAA
White
Transmitter: 90*26*13.5 mm
Magnet: 31*14*6.5 mm
45.1 g (with batteries)
PC
Zigbee 3.0 / Thread (IEEE 802.15.4)
180s
Open Area 100m
Indoor
-10℃~60℃
5-95%RH，non-condensing
CE/FCC/RoHS
FAQ
1. What is Thread? Why choose Thread?
Thread is a low-power wireless mesh networking protocol designed for smart home devices. The SNZT-04P uses Matter over Thread: Thread provides low-power operation and fast local communication, while Matter enables cross-ecosystem compatibility.
2. Which Matter ecosystems is the sensor compatible with?
The sensor is compatible with all major Matter platforms, including Apple Home, SmartThings, Google Home, Alexa, and Home Assistant.
3. What do I need to use a Thread product in Matter ecosystems?
The sensor does not connect directly to Wi-Fi. You need a Matter hub with a Thread border router. Please refer to SONOFF Help Center > Solutions > How to use a SONOFF Thread Sensor in Matter Platforms for a detailed list of compatible hubs, setup instructions, and troubleshooting.
4. What do I need to use the Thread product in Home Assistant?
5. Can I use the product on the eWeLink platform?
Yes. In Thread mode, you can add the sensor to a Matter platform and then share it to the eWeLink platform. In Zigbee mode, you can add it directly to eWeLink using compatible Zigbee gateways. Please note that you cannot add the device directly to eWeLink in Thread mode because our gateways do not currently function as Thread border routers.
6. Can I use the sensor in Thread and Zigbee modes at the same time?
No. You can only use one mode at a time. Switching modes will restore the device to factory settings.
7. How does the 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".
8. What is the tamper-proof feature?
The SNZT-04P 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.