SONOFF Presence Sensors vs Motion Sensors, Explained
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SONOFF is a smart home brand known for low-cost Zigbee sensors and switches that work with many systems, including Home Assistant, Alexa and SmartThings. Its sensor range has grown from basic motion detectors into true presence sensors that notice someone sitting quietly on a sofa. If you searched for a SONOFF presence sensor, you probably want lights that stay on while you are in the room and switch off when you leave, without waving your arms to keep them awake.
In one sentence: the SNZB-06P24 and SNZB-06P are presence sensors that can detect people who are sitting still, the SNZB-03P and SNZB-03PR2 are motion sensors that react to movement, and the SNZB-02P and SNZB-04PR2 round out a setup with temperature, humidity and door monitoring.
Some terms first, in plain words. A motion sensor (usually a PIR sensor) notices body heat moving across its view; if you sit still reading, it may think the room is empty. A presence sensor uses radar to spot tiny movements, even breathing, so it knows you are still there. mmWave means millimeter-wave radar, a high-frequency type (24GHz here) that is especially sensitive. Zigbee is a low-power wireless language smart devices use to talk to a hub or bridge, which connects them to your app. Every sensor in this guide needs a Zigbee hub. Home Assistant is a popular free smart home platform you run on your own computer or small device.
SONOFF Presence Sensors Compared
| Model | Sensor type | Range | Power | Light sensor |
|---|---|---|---|---|
| SONOFF SNZB-06P24 Zigbee Presence Sensor | 24GHz mmWave presence | 4 m, 110 degrees | USB-C | Yes, with history |
| SONOFF Zigbee Human Presence Sensor (SNZB-06P) | 5.8GHz radar presence | 4 m | DC (details unclear) | Yes |
| SONOFF SNZB-03P Zigbee Motion Sensor | Motion | 19.7 ft | CR2477 battery | Not listed |
| SONOFF SenseGuard SNZB-03PR2 Zigbee Motion Sensor | Motion | 4 m | Included battery | Yes, with history |
| SONOFF SNZB-02P Zigbee Temperature Humidity Sensor | Temperature and humidity | Not applicable | CR2477 battery | No |
| SONOFF SenseGuard DW Gen2 SNZB-04PR2 Zigbee | Door and window contact | 30 mm magnet gap | 2 AAA batteries each | No |
SONOFF SNZB-06P24 Zigbee Presence Sensor for Precise Room Detection
Sonoff
SONOFF SNZB-06P24 Zigbee Presence Sensor, 24GHz mmWave & Light Sensor, Zone Positioning, Self-Learning Calibration, USB-C Powered, Works with Home Assistant, Alexa, SmartThings, Hub Required
Price and specifications are read from the Amazon product page and can change.
SONOFF SNZB-06P24 Zigbee Presence Sensor
Best for: Rooms where people sit still
Pros
- 24GHz mmWave detects breathing
- 7 configurable zones
- Self-learning calibration
- Light sensor with history
Cons
- Needs USB-C power
- Zigbee hub required
The SONOFF SNZB-06P24 Zigbee Presence Sensor is the most advanced SONOFF mmWave sensor in this group. Its 24GHz radar picks up subtle micro-movements such as breathing, so lights can stay on while you work at a desk or watch a film. It is designed for ceiling mounting and powered through USB-C, so it needs a cable to a power adapter rather than batteries.
The standout feature is zone positioning. Within its 4-meter range and 110-degree view, you can set up to 7 zones and switch each one on or off. That means you can ignore a hallway or window where passing movement would cause false triggers, while focusing on a sofa or desk. Detection Calibration is a self-learning mode that studies the room and filters out repeated interference from appliances, pipes or airflow. An ambient light sensor with calibration and history lets you build rules like “turn on the lamp only if the room is dark and someone is here.”
It works with Home Assistant, SmartThings and Alexa through a Zigbee hub, and advanced settings can be adjusted over Bluetooth in the eWeLink app. This SONOFF SNZB-06P24 suits a living room, home office or bedroom where people spend time sitting still. If you want something simpler, the SNZB-06P covers basic presence without zones.
SONOFF Zigbee Human Presence Sensor SNZB-06P for Simple Presence Lighting
Sonoff
SONOFF Zigbee Human Presence Sensor, SNZB-06P Zigbee Smart Motion Detector with 5.8GHZ cmWave Radar, Requires ZigBee Bridge (1-Pack)
Price and specifications are read from the Amazon product page and can change.
SONOFF Zigbee Human Presence Sensor
Best for: Simple presence-based lighting
Pros
- Detects stationary people
- Built-in light sensor
- Local scenes without internet
- Wide platform support
Cons
- No zone settings
- Power details inconsistent
The SONOFF Zigbee Human Presence Sensor, model SNZB-06P, uses 5.8GHz radar to detect people who are moving or standing still. The title calls it cmWave (centimeter-wave), a lower frequency than the 24GHz mmWave of the SNZB-06P24. It turns lights on when you approach and keeps them on until you leave, and a built-in light detector makes sure lights only come on when the room is dark.
It supports Zigbee 3.0 hubs such as SONOFF NSPanel Pro, iHost, ZB Bridge Pro and ZBDongle-E, plus Echo Plus 2nd generation, and lists Alexa, Google Home, SmartThings, Alice, IFTTT and Home Assistant. Local smart scenes keep working between Zigbee devices even without internet. Range is 4 meters, it weighs 31 grams and is designed for wall mounting, and it works from minus 10 to 60 degrees Celsius.
The power details are inconsistent: one field says DC power while another says it needs a 9V battery. Check the product page to confirm how it is powered before choosing a mounting spot. The SONOFF SNZB-06P suits beginners who want presence detection in a bathroom or kitchen without zone setup.
SONOFF SNZB-03P Zigbee Motion Sensor for Hallways and Security
Sonoff
SONOFF SNZB-03P Zigbee Motion Sensor, 3-Year Battery Life, for Alert System and Automations Wireless Motion Detector, SONOFF Zigbee Bridge Required, Batteries Included (1 Pack)
Price and specifications are read from the Amazon product page and can change.
SONOFF SNZB-03P Zigbee Motion Sensor
Best for: Hallways and security triggers
Pros
- 3-year battery life
- Fast 5-second reset
- Battery included
Cons
- Motion only, misses still people
- No light sensor
The SONOFF SNZB-03P Zigbee Motion Sensor is a classic motion detector rather than a presence sensor. It turns lights on as you pass and off after you leave, with a reset time as short as 5 seconds. Because it senses movement, it works best in places people walk through rather than sit in: hallways, stairs, entryways and garages.
A CR2477 coin battery, included, is rated for more than 3 years. Range is 19.7 feet, and it weighs 58 grams. It supports the same Zigbee 3.0 hubs as the SNZB-06P, and local scenes run even if Wi-Fi goes down. For security, it can trigger a camera recording, sound an alarm through the gateway and send app alerts when someone enters. The listing does not mention a light sensor. Pair it with a smart switch, like those in our SONOFF smart switch guide, to control hallway lights.
SONOFF SenseGuard SNZB-03PR2 Zigbee Motion Sensor for Flexible Placement
Sonoff
SONOFF SenseGuard SNZB-03PR2 Zigbee Motion Sensor with Light Sensor for Light Control, Alarm System, Automation, Illuminance History, Compaitble with Home Assistant, Alexa, SmartThings
Price and specifications are read from the Amazon product page and can change.
SONOFF SenseGuard SNZB-03PR2 Zigbee Motion Sensor
Best for: Flexible placement with light control
Pros
- 5-60 second adjustable duration
- Lux sensor with history
- Magnetic, adhesive or standalone mount
- 360 degree rotating head
Cons
- Motion only, not mmWave
- Nonstandard battery
The SONOFF SenseGuard SNZB-03PR2 Zigbee Motion Sensor is a newer motion sensor with more control. You can set the detection duration from 5 to 60 seconds: short for busy hallways, longer for bedrooms and bathrooms to avoid lights switching off too soon.
A built-in light sensor measures real-time lux (brightness) with calibration and exportable history, and lux values can be used as conditions on their own. It mounts with a magnet, adhesive or simply stands on a shelf, the head rotates 360 degrees, and an optional downlight accessory allows ceiling mounting. Range is 4 meters. With a SONOFF Zigbee hub, it can trigger alarms, cameras, lights or motion alerts, and it works with Home Assistant via Z2M or ZHA, Alexa and SmartThings. It uses one included nonstandard battery; the listing does not name the type. One spec field repeats the SNZB-06P24 model name, which appears to be a listing error.
Choose the SNZB-03PR2 over the SNZB-03P when you want light-based rules and adjustable timing. Remember it is still a motion sensor, so for rooms where people sit still, pick one of the presence sensors above.
SONOFF SNZB-02P Zigbee Temperature Humidity Sensor for Room Comfort
Best for: Monitoring nursery or basement climate
Pros
- Accurate to 0.2 degrees C
- Updates every 5 seconds
- Comfort alerts
- 4-year battery life
Cons
- Not a presence sensor
- Cloud history up to half a year
The SONOFF SNZB-02P Zigbee Temperature Humidity Sensor is not a presence sensor, but it often joins one in a first smart home kit. It uses a Swiss-made sensor accurate to plus or minus 0.2 degrees Celsius and 2 percent humidity, updating every 5 seconds.
Comfort alerts notify your phone when a room goes outside the range you set, useful for a nursery, basement or pet room. Up to half a year of cloud history lets you view and export daily or monthly trends. A CR2477 battery is rated for about 4 years, based on SONOFF’s own lab data. It supports Zigbee 3.0 hubs and works with Alexa and Google Home. Some spec fields, such as 17.72-inch width and a 100-degree upper temperature, look like errors for a 48-gram sensor.
SONOFF SenseGuard DW Gen2 SNZB-04PR2 Zigbee for Doors and Windows
Best for: Watching doors and windows
Pros
- Four sensors in one pack
- Tamper alert
- Replaceable AAA batteries
- Horizontal or vertical magnet
Cons
- 30mm max gap
- Zigbee hub required
The SONOFF SenseGuard DW Gen2 SNZB-04PR2 Zigbee door and window sensor comes as a 4-pack. Each sensor has two parts, a body and a magnet; when they separate, your phone gets an open alert. A tamper button sends an alert if someone removes the sensor.
It runs on replaceable AAA batteries, two per sensor and included. The magnet can go horizontally or vertically with up to 30 mm of gap, and changes can trigger alarms, camera recording, lights or voice notifications. It works with Home Assistant via SONOFF dongles and with Alexa and SmartThings through compatible hubs. If you are comparing options from other makers, our Zigbee motion sensor guide is a helpful next read.
How to Choose the Right SONOFF Presence Sensor
Start with how people use the room. If they sit still, choose a presence sensor: the SNZB-06P24 for zones and self-learning, or the SNZB-06P for simpler setup. If they walk through, a motion sensor like the SNZB-03P or SNZB-03PR2 is enough.
Next, think about power. The SNZB-06P24 needs USB-C, so mount it near an outlet. Motion sensors run on long-life batteries and go anywhere.
Then check your hub. All six need a Zigbee hub. SONOFF lists its own NSPanel Pro, iHost, ZB Bridge Pro and ZBDongle-E, plus Echo devices with Zigbee and SmartThings hubs.
Finally, add extras such as the temperature sensor or door sensors to build a fuller system.
FAQ
Which SONOFF presence sensor should I buy?
For the most control, the SNZB-06P24 with 7 zones and self-learning calibration. For a simpler setup, the SNZB-06P.
Do SONOFF sensors work without a hub?
No. Every listing here says a Zigbee hub or bridge is required.
Do SONOFF sensors work with Home Assistant?
Yes. The SNZB-06P24, SNZB-06P, SNZB-03PR2 and SNZB-04PR2 listings all name Home Assistant.
What is the difference between presence and motion sensors?
Motion sensors react to movement across the room; presence sensors use radar to detect people who are still.
Will my automations work if the internet goes down?
The SNZB-06P and SNZB-03P listings say local Zigbee scenes keep working without internet.
