SONOFF SNZB-04 - Wireless ZigBee Door Contact Sensor for Smart Home
Brand: SONOFF
VAT included (Ex VAT: 5.69 €)
SONOFF SNZB-04 is a mini smart wireless opening and closing sensor for doors and windows that uses ZigBee 3.0 technology. This sensor requires a ZigBee Bridge to operate, making it an essential component for intrusion detection and automation in smart home systems.
This sensor allows you to accurately monitor the opening and closing of doors or windows, making smart home control easier. Thanks to its integration with the eWeLink app, you can set up automatic actions such as turning on lights when a door opens, activating alarm systems, receiving instant notifications and checking the event history.
ZigBee technology offers a wide range and a robust connection without overloading the WiFi network, as well as very low power consumption, ideal for battery-powered devices. The sensor runs on a 3 V battery (CR2032), and the app will notify you when the battery level is below 10%.
Practical uses include setting scenes to light up hallways when a door opens or activating cameras with two-way audio so you can see and speak to whoever enters your home. It is also useful for monitoring drawers, garage doors, blinds and other openings where two parts join physically.
Control can be shared with family members for joint and quick management of the system. In addition, the sensor is compatible with the IFTTT platform, expanding automation and customisation options.
Key features
- Battery: 3 V (CR2032)
- Wireless connection: ZigBee 3.0
- Material: durable PC
- Magnet dimensions: 32 x 15.6 x 13 mm
- Sensor dimensions: 47 x 27 x 13.5 mm
- Requires use together with ZigBee Bridge
Compatibility and use
The SONOFF SNZB-04 sensor is designed to integrate into smart home systems that support ZigBee via a compatible Bridge. It is ideal for smart homes looking for security and efficient automation without overloading WiFi networks. It works perfectly with the eWeLink app, which makes remote setup and management easy.
This sensor is a practical solution for anyone who wants to monitor access simply, securely and with low energy consumption, integrating into smart ecosystems to improve home security and convenience.
- Wireless ZigBee 3.0 sensor for doors and windows
- Compatible with ZigBee Bridge (required)
- 3 V CR2032 battery with low-battery notification
- Enables automation for lights, alarms and notifications
- Durable PC material and compact design
- Magnet dimensions: 32x15.6x13 mm; sensor: 47x27x13.5 mm
- Compatible with the eWeLink app for remote control
- Supports integration with the IFTTT platform for advanced automation
Customer Questions & Answers
What are the exact materials, dimensions and weight of the SNZB-04 sensor, and what is included in the box?
The sensor is made of ABS plastic. Its dimensions are: main sensor 47 x 27 x 13.5 mm and magnet 32 x 15.6 x 13 mm. The total weight of the set is approximately 26 g. The box includes the sensor, magnet, CR2450 battery, double-sided adhesive tape and user manual.
Is the SNZB-04 difficult to install, and what technical considerations should be taken into account for correct operation?
Installation is straightforward: fix the sensor and magnet to the door or window and its frame using the supplied tape, making sure both are aligned within 5 mm. It is important to avoid placing the sensor on metal surfaces or near strong electromagnetic interference, as this may reduce the reliability of ZigBee communication.
What battery life can realistically be expected, and are there low-battery notifications?
Under normal conditions, the CR2450 battery usually lasts between 9 and 12 months depending on how often the door/window is opened and closed. The system notifies low battery status through the app associated with the compatible ZigBee hub, although accuracy may vary depending on the hub and software.
Does the SNZB-04 comply with electrical and radio safety regulations, and can it be used indoors or outdoors?
The device complies with CE and RoHS regulations for electrical safety and emissions. It is designed strictly for indoor use (recommended range: 0–40°C; humidity: 20–85% RH non-condensing); it is not water- or dust-resistant to any IP rating, so it may fail if exposed outdoors.
Do I need an additional device to use the SONOFF SNZB-04 sensor?
Yes, it is essential to use the sensor together with a ZigBee Bridge for it to work correctly.
What type of battery does the sensor use and how is low battery indicated?
The sensor uses a 3 V CR2032 battery. The eWeLink app sends a notification when the battery is below 10%.
Which apps is the sensor compatible with?
The sensor is compatible with the eWeLink app and also supports setups through the IFTTT platform for custom automations.
What uses is this sensor recommended for?
It is ideal for monitoring the opening and closing of doors, windows, drawers, garage doors and blinds, integrating into smart home systems for security and automation.
How does the sensor integrate into a smart home system?
It connects via ZigBee to a compatible Bridge, which in turn integrates with the eWeLink app to set up scenes and notifications.
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