Description
Sonoff SenseGuard DW Gen2 Zigbee Door & Window Sensor (SNZB-04PR2)
Reliable Smart Monitoring for Doors, Windows, Cabinets & More
Add an extra layer of intelligence to your home with the Sonoff SenseGuard DW Gen2 Zigbee Door & Window Sensor (SNZB-04PR2). This compact Zigbee 3.0 contact sensor instantly detects when a door, window, cupboard, drawer, or other entry point is opened or closed, allowing you to receive notifications, improve home security, and create powerful smart home automations.
Whether you’re securing your home, monitoring valuable storage areas, or making your lighting and climate control more efficient, the SNZB-04PR2 delivers dependable performance with long battery life and broad Zigbee compatibility.
Instant Open & Close Detection
Know immediately when something opens or closes.
The SNZB-04PR2 continuously monitors the position of the magnetic contact and instantly reports status changes to your Zigbee hub, allowing your smart home to react in real time.
Use it to monitor:
- Front doors
- Back doors
- Sliding doors
- Windows
- Garage side doors
- Cabinets
- Drawers
- Cupboards
- Safes
- Medicine cabinets
- Pet doors
- Mailboxes
- Refrigerators and freezers
Its compact size makes it suitable for almost any opening in your home.
Enhance Your Home Security
Receive instant notifications whenever protected doors or windows are opened.
Create automations such as:
- Alert your phone if a door opens while you’re away
- Trigger a siren when an entry point is opened
- Turn on security lights after dark
- Start camera recording when a door is opened
- Activate security scenes automatically
Tamper detection provides additional peace of mind by notifying you if someone attempts to remove or interfere with the sensor.
Smarter Home Automation
The SNZB-04PR2 is more than just a security sensor—it can make your home more convenient and energy efficient.
Example automations include:
- Turn hallway lights on when the front door opens
- Switch wardrobe lighting on when the cupboard is opened
- Pause air conditioning when a window is opened
- Turn off heating if a patio door is left open
- Announce arrivals through smart speakers
- Trigger routines when family members come home
Its fast response makes everyday automations feel seamless and natural.
Built-In Tamper Protection
Security doesn’t stop at the door.
The integrated tamper function detects when the sensor is removed or disturbed, allowing your smart home to send immediate alerts so you can respond quickly.
Ideal for security-focused installations where sensor integrity is important.
Flexible Installation
The detachable magnetic contact allows installation in a wide range of positions.
Features include:
- Horizontal or vertical mounting
- Works on uneven surfaces
- Supports wider installation gaps (up to 30 mm, depending on orientation)
- Suitable for wood, aluminium, uPVC, and many other door and window frames
Installation is quick using the included adhesive pads.
Up to 3 Years Battery Life
Powered by 2 × AAA batteries, the SNZB-04PR2 is designed for long-lasting operation.
Benefits include:
- Up to 3 years of battery life*
- Low maintenance
- Battery level reporting
- Low battery notifications
*Actual battery life depends on usage, reporting frequency, and environmental conditions.
Zigbee 3.0 Compatibility
The SNZB-04PR2 supports the Zigbee 3.0 standard for reliable, low-power communication.
Compatible with:
- Home Assistant (ZHA)
- Zigbee2MQTT
- SONOFF Zigbee Bridge
- Other Zigbee 3.0 compatible hubs
A compatible Zigbee coordinator or gateway is required.
Ideal Applications
✔ Home Security
✔ Window Monitoring
✔ Door Monitoring
✔ Garage Access
✔ Cabinet & Drawer Monitoring
✔ Safe Monitoring
✔ Mailbox Notifications
✔ Refrigerator & Freezer Monitoring
✔ Smart Lighting Automation
✔ Energy-Saving HVAC Control
Technical Highlights
| Specification | Details |
|---|---|
| Model | SONOFF SNZB-04PR2 |
| Sensor Type | Magnetic Door & Window Contact Sensor |
| Wireless Protocol | Zigbee 3.0 |
| Battery | 2 × AAA |
| Battery Life | Up to 3 Years* |
| Tamper Detection | Yes |
| Installation | Adhesive Mount |
| Maximum Gap | up to 30 mm for horizontal mounting, up to 15 mm for vertical mounting. |
| Smart Platforms | Home Assistant, Zigbee2MQTT, ZHA, SmartThings & More |
Compatibility
The SONOFF SNZB-04PR2 requires a compatible Zigbee hub or coordinator.
Compatible with:
- Home Assistant (ZHA)
- Zigbee2MQTT
- SONOFF Zigbee Bridge
- SmartThings
- Tuya Zigbee Hubs
- OpenHAB
- Other Zigbee 3.0 compatible platforms
Please verify compatibility and available features within your chosen Zigbee ecosystem.
Why Choose the SONOFF SNZB-04PR2?
The Sonoff SenseGuard DW Gen2 Zigbee Door & Window Sensor is a compact yet powerful addition to any smart home. Combining reliable open/close detection, built-in tamper protection, long battery life, and broad Zigbee compatibility, it helps you improve home security, automate everyday tasks, and save energy.
Whether you’re securing your home, monitoring valuables, or creating intelligent automations with Home Assistant or another Zigbee platform, the SNZB-04PR2 provides dependable performance in a discreet, easy-to-install design.
