SONOFF SenseGuard Motion Gen2
SONOFF SenseGuard Motion Gen2 (SNZB-03PR2) is the next generation of smart motion sensing, designed to eliminate the common frustrations of traditional PIR sensors. By combining high-speed motion detection with an independent light (lux) sensor and an exceptional 3-year battery life, it allows you to build highly reliable, context-aware automations without the need for constant battery changes.
It is the perfect basic Zigbee motion sensor for installation in hallways, bathrooms, and kitchens, as it offers a significant upgrade in response time compared to older models.
Key Features
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Lightning-fast detection and adjustable cooldown time: Detects motion in less than 3 seconds. Unlike older sensors with fixed hardware delays, Gen2 allows you to adjust the cooldown time from 5 to 60 seconds. This prevents false triggers and enables highly energy-efficient automations.
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Independent light (Lux) sensor: It features a dedicated, highly accurate ambient light sensor that records changes in illumination over time. You can create advanced rules – for example, hallway lights turn on only if motion is detected and the room is actually dark.
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3-year battery life: It is powered by a massive CR2477 coin cell battery. You can install these sensors in hard-to-reach corners of your home and forget about them for years.
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Ready for Apple Home and Matter: Although it communicates natively via the Zigbee 3.0 protocol (excellent for Home Assistant or Zigbee2MQTT), it can also be easily integrated into the Apple Home ecosystem when paired with a compatible Matter bridge (such as the SONOFF ZBBridge-U).
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Wide area coverage: Provides a wide, 120-degree detection angle with a reliable range of up to 6 meters, ensuring comprehensive coverage for indoor security and lighting control.
Technical Specifications
| Feature | Specification |
| Model | SNZB-03PR2 (SenseGuard series) |
| Detection technology | Passive Infrared (PIR) + Ambient light (Lux) |
| Wireless protocol | Zigbee 3.0 (IEEE 802.15.4) |
| Detection range | Up to 6 meters |
| Detection angle | 120° |
| Power supply | 3V CR2477 battery (included) |
| Battery life | Up to 3 years |
| Adjustable cooldown time | From 5 to 60 seconds |
| Platform compatibility | Home Assistant (ZHA / Zigbee2MQTT), eWeLink, Apple Home (via Matter bridge) |
| Operating temperature | -10 °C to +60 °C |
| Dimensions | 44 mm × 44 mm × 65 mm |
| Weight | ~43 g |
Package contents
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SONOFF SenseGuard Motion Gen2 sensor (SNZB-03PR2)
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CR2477 battery (pre-installed)
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Adhesive mounting tape
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Quick start guide