he SONOFF SenseGuard Presence Core 24G (SNZB-06P24) is a Zigbee presence sensor based on 24 GHz mmWave radar technology, designed to accurately detect whether people are present in a room. Unlike traditional PIR motion sensors, it can detect not only normal movement but also the smallest human micro-movements, such as breathing or posture changes, allowing it to detect presence even when someone is sitting or working motionless for a long time.
The 24 GHz radar technology provides a detection distance of up to 4 meters and a 110° detection angle. The detection area can be divided into seven separately configurable zones, each of which can be enabled or disabled. This allows the sensor to monitor only the relevant areas of a room while excluding zones where presence detection is not needed.
One of the device’s key innovations is calibratable interference filtering, called Detection Calibration. The sensor can learn and filter out fixed or repetitive environmental interference sources, such as fans, air conditioners, pipes, or other equipment. This significantly reduces false detections and increases system reliability.
Thanks to the built-in light sensor, ambient brightness can also be measured. This enables intelligent automations, such as turning on lights automatically only when someone is present and the room brightness drops below a preset level, for example near dusk.
The sensor uses Zigbee 3.0 communication, making it compatible with Home Assistant, SmartThings, Alexa, eWeLink, and other Zigbee-compatible systems. When using third-party Zigbee platforms, advanced settings can be configured via Bluetooth through the eWeLink app, as all settings are stored locally on the device.
The compact sensor supports multiple installation methods. It can be placed on a desk or shelf, mounted magnetically, or installed on a wall or ceiling using adhesive mounting. The adjustable sensor head allows the optimal detection angle to be set with the base, while an optional recessed ceiling frame enables discreet ceiling installation.
About SONOFF
SONOFF is a globally recognized smart home brand developed by ITEAD, offering affordable yet advanced Wi-Fi, Zigbee, and Matter-compatible devices. Its products are widely used in both residential and business automation systems.
The SONOFF range includes smart relays, switches, sensors, energy meters, control panels, and Zigbee gateways. Most devices can be integrated with Home Assistant, Alexa, Google Home, SmartThings, IFTTT, and other popular platforms.
The SenseGuard series is SONOFF’s next-generation presence detection solution, going beyond the limitations of traditional motion sensors by detecting real human presence with advanced mmWave radar technology.
Key Features
24 GHz mmWave radar: Highly sensitive presence detection capable of detecting even the smallest human movements
7-zone detection area: The 4-meter detection range can be divided into seven separately configurable zones
Automatic interference filtering: Filters out false detections caused by fans, air conditioners, and other interference sources
Built-in light sensor: Continuous lux measurement and support for lighting automations
Bluetooth configuration: Access to advanced settings even when using third-party Zigbee platforms
Flexible installation: Magnetic, adhesive, freestanding, or recessed ceiling installation
Adjustable sensor head: Optimal detection angle adjustment for different rooms
Real presence detection: Detects not only motion but also sustained presence
Smart Home Protocols and Platform Compatibility
Zigbee 3.0: IEEE 802.15.4 communication
Bluetooth: Local configuration and settings adjustment
eWeLink: Full functionality and configuration support
Supported Zigbee gateways and controllers: SONOFF ZBBridge-P, ZBBridge-U, SONOFF NSPanel Pro, ZBDongle-P, ZBDongle-E, Dongle-M, Dongle-PMG24, and Dongle-LMG21
Home Assistant: ZHA and Zigbee2MQTT support
SmartThings: Presence and light sensor data support
Amazon Alexa: Presence status query
Google Home: Presence status query
IFTTT: Automation events based on presence
Smart Functions
Real-time presence detection with timestamp
Real-time brightness measurement in lux
Illuminance history storage
Illuminance data export
Presence detection event log
Automations based on presence
Automations based on brightness
Combined presence and brightness conditions
Object distance-based events
Configurable detection delay
Detection sensitivity fine-tuning
Lux calibration within a ±1000 lux range
Push notifications on presence changes
Sharing with multiple eWeLink users
Can be assigned to rooms and areas
Local Bluetooth configuration for third-party systems
OTA firmware update support when used with a compatible Zigbee gateway
Technical Specifications
Product name: SONOFF SenseGuard Presence Core 24G
Model: SNZB-06P24
Product series: SenseGuard Series
MCU: TLSR8656
Detection technology: 24 GHz mmWave radar
Wireless protocol: Zigbee 3.0 IEEE 802.15.4
Bluetooth: For configuration purposes
Power supply: 5V DC / 0.5A
Connector: USB Type-C
Dimensions: 44.2 × 44.2 × 59 mm
Weight: 34.5 g
Housing material: PC + ABS
Color: White
Installation location: Indoor use
Communication range: Up to 100 m in open areas
Operating temperature: -10°C to +60°C
Operating humidity: 0–90% RH, non-condensing
Installation altitude: Below 2000 m
Detection distance: Up to 4 meters
Detection angle: 110°
Number of detection zones: 7
Certifications: CE, FCC, RoHS