The Smart Device Compare comparison

Shelly BLU Motion ZB vs Sonoff SenseGuard Motion Gen2

Understand the differences. Decide what matters to your home.

Before you compare every specification

Key differences between Shelly BLU Motion ZB and Sonoff SenseGuard Motion Gen2

A summary of selected recorded differences between these motion sensors. Check the full specification table below for details and conditions.

Feature differences among your selected devices

Bluetooth (connectivity): Shelly BLU Motion ZB — Yes (Bluetooth 5 (LE) broadcasting in the BTHome format, running simultaneously with Zigbee. Remote control needs a Shelly BLU Gateway or a Shelly Plus, Pro, Gen3 or Gen4 device as the bridge.); Sonoff SenseGuard Motion Gen2 — No.

Specifications to check side by side

Detection Timeout (features): Shelly BLU Motion ZB — Yes (Motion hold time is configurable in seconds (60 by default): while movement continues the timer restarts, and a motion clear event is emitted once it expires.); Sonoff SenseGuard Motion Gen2 — 60 seconds (Cooldown adjustable from 5 to 60 seconds).
Alexa (integrations): Shelly BLU Motion ZB — Shelly gateway required (Reaches Amazon Alexa through the Shelly Smart Control account, and the product page states that a compatible Bluetooth or Zigbee gateway is required for automations and app control.); Sonoff SenseGuard Motion Gen2 — Yes (Pairs to an Echo device with a built-in Zigbee hub, or through a SONOFF Zigbee hub).
Google Home (integrations): Shelly BLU Motion ZB — Shelly gateway required (Reaches Google Home through the Shelly Smart Control account, and the product page states that a compatible Bluetooth or Zigbee gateway is required for automations and app control.); Sonoff SenseGuard Motion Gen2 — No.
Battery Life (power): Shelly BLU Motion ZB — 5 years; Sonoff SenseGuard Motion Gen2 — 3 years.

Information still to confirm

6 of 25 comparison fields lack a resolved value for at least one selected device. Missing information is not evidence that a feature is absent.
Check the full table and manufacturer documentation before ruling out a device.

These observations are derived from recorded catalog data and have not all been independently verified. Confirm details with the manufacturer before purchasing.

Compare capabilities, compatibility and setup requirements.

Option 1 · Shelly

Shelly BLU Motion ZB

Last updated October 2026

View full device profile

Option 2 · Sonoff

Sonoff SenseGuard Motion Gen2

Last updated October 2026

View full device profile

What the catalog tells us

Understand the tradeoffs.

These counts describe the available data, not a quality score. More features do not automatically make a better device.

6differences with recorded values for every device

6rows with missing or unspecified information

Consider your setup

Battery Life

Shelly BLU Motion ZB5 years
Sonoff SenseGuard Motion Gen23 years

Compare the stated test conditions. Catalog battery figures alone do not predict runtime in your home.

Inspect the specifications

Your priorities, side by side

Focus on what changes.

Mark the specifications you care about. Open manufacturer sources for verification scope; fields without citations remain catalog data. Expand notes for other qualifications.

Differences onlyMy priorities (0)

Showing 25 of 25 rows. “Not recorded” does not mean “No”.

Reading layout

Alerts

Low Battery Alerts

Shelly BLU Motion ZB: Yes
Catalog note
IAS Zone status bit 3 flags a battery at or below 15 percent, and the battery percentage is also broadcast over BTHome.
Sonoff SenseGuard Motion Gen2: Not recorded

Motion Alerts

Shelly BLU Motion ZB: Yes
Catalog note
Every motion detection is broadcast as an event over BTHome and sent over Zigbee to the bound devices, and the app can push a notification when movement is detected.
Sonoff SenseGuard Motion Gen2: Yes

Connectivity

2.4 GHz Wi-Fi

Shelly BLU Motion ZB: No
Sonoff SenseGuard Motion Gen2: No

5 GHz Wi-Fi

Shelly BLU Motion ZB: No
Sonoff SenseGuard Motion Gen2: No

Bluetooth

Shelly BLU Motion ZB: Yes
Catalog note
Bluetooth 5 (LE) broadcasting in the BTHome format, running simultaneously with Zigbee. Remote control needs a Shelly BLU Gateway or a Shelly Plus, Pro, Gen3 or Gen4 device as the bridge.
Sonoff SenseGuard Motion Gen2: No

Thread

Shelly BLU Motion ZB: No
Sonoff SenseGuard Motion Gen2: No

Z Wave

Shelly BLU Motion ZB: No
Sonoff SenseGuard Motion Gen2: No

Zigbee

Shelly BLU Motion ZB: Zigbee Hub required
Catalog note
Zigbee 3.0 end device (IAS Zone 0x000D, profile 0x104, 802.15.4), so it joins an existing Zigbee coordinator.
Sonoff SenseGuard Motion Gen2: Zigbee Hub required

Features

Angle Of Detection

Shelly BLU Motion ZB

Not recorded

Sonoff SenseGuard Motion Gen2

120°

Manufacturer source

The stated sensing angle is 120 degrees.

Sonoff SenseGuard Motion Gen2 — manufacturer product description →

Source section: Product description / feature descriptions
Model: SNZB-03PR2
Region: Manufacturer listing for the named model/variant; regional equivalence has not been established
Firmware: Not specified by this source
Checked: 2026-10-04

Check the specified variant, required hub and installation instructions. Manufacturer claims are not independent performance tests.

Document check only; not a hands-on test or verification of every regional or firmware variant.

Automations

Shelly BLU Motion ZB: Yes
Catalog note
Motion and light-level events trigger scenes and automations from the Shelly Smart Control app, and scripting is available through a gateway.
Sonoff SenseGuard Motion Gen2: Yes

Detection Timeout

Shelly BLU Motion ZB: Yes
Catalog note
Motion hold time is configurable in seconds (60 by default): while movement continues the timer restarts, and a motion clear event is emitted once it expires.
Sonoff SenseGuard Motion Gen2: 60 seconds
Catalog note
Cooldown adjustable from 5 to 60 seconds

History Records

Shelly BLU Motion ZB: Not recorded
Sonoff SenseGuard Motion Gen2: 6 months
Catalog note
Illuminance history retained for up to 6 months

Motion Sensitivity

Shelly BLU Motion ZB: Yes
Catalog note
Three PIR sensitivity levels (low, medium, high), adjustable to cut false triggers from pets or distant movement.
Sonoff SenseGuard Motion Gen2: Not recorded

Range Of Detection

Shelly BLU Motion ZB

Not recorded

Sonoff SenseGuard Motion Gen2

6 m

Manufacturer source

The stated sensing range is six metres.

Sonoff SenseGuard Motion Gen2 — manufacturer product description →

Source section: Product description / feature descriptions
Model: SNZB-03PR2
Region: Manufacturer listing for the named model/variant; regional equivalence has not been established
Firmware: Not specified by this source
Checked: 2026-10-04

Check the specified variant, required hub and installation instructions. Manufacturer claims are not independent performance tests.

Document check only; not a hands-on test or verification of every regional or firmware variant.

Integrations

Alexa

Shelly BLU Motion ZB: Shelly gateway required
Catalog note
Reaches Amazon Alexa through the Shelly Smart Control account, and the product page states that a compatible Bluetooth or Zigbee gateway is required for automations and app control.
Sonoff SenseGuard Motion Gen2: Yes
Catalog note
Pairs to an Echo device with a built-in Zigbee hub, or through a SONOFF Zigbee hub

Apple Home

Shelly BLU Motion ZB: No
Catalog note
The device documentation lists only Bluetooth 5 LE and Zigbee 3.0, with no Matter or HomeKit profile, and Shelly's compatibility page names only Alexa, Google Home and SmartThings.
Sonoff SenseGuard Motion Gen2: No

Google Home

Shelly BLU Motion ZB: Shelly gateway required
Catalog note
Reaches Google Home through the Shelly Smart Control account, and the product page states that a compatible Bluetooth or Zigbee gateway is required for automations and app control.
Sonoff SenseGuard Motion Gen2: No

Home Assistant

Shelly BLU Motion ZB: Yes
Catalog note
Zigbee2MQTT supports this exact model (SBMO-103Z), exposing occupancy, battery, battery low, light level, the dark and bright thresholds and motion sensitivity. Over Bluetooth it also broadcasts BTHome, which Home Assistant reads natively.
Sonoff SenseGuard Motion Gen2: Yes
Catalog note
Works through Zigbee2MQTT or ZHA with any Zigbee coordinator

Matter

Shelly BLU Motion ZB: No
Catalog note
Not in the CSA certified-product database under Shelly Europe Ltd., and the device documentation lists only Bluetooth 5 LE and Zigbee 3.0.
Sonoff SenseGuard Motion Gen2: No

SmartThings

Shelly BLU Motion ZB: Shelly gateway required
Catalog note
Reaches SmartThings through the Shelly Smart Control account, and the product page states that a compatible Bluetooth or Zigbee gateway is required for automations and app control.
Sonoff SenseGuard Motion Gen2: Not recorded
Catalog note
SONOFF lists SmartThings compatibility, but the available Edge driver covers the previous SNZB-03P and does not yet recognise this model

Power

Battery Life

Shelly BLU Motion ZB: 5 years
Sonoff SenseGuard Motion Gen2: 3 years

Battery Type

Shelly BLU Motion ZB

1x CR2477

Sonoff SenseGuard Motion Gen2

CR2477

Manufacturer source

A CR2477 battery powers the sensor.

Sonoff SenseGuard Motion Gen2 — manufacturer product description →

Source section: Product description / feature descriptions
Model: SNZB-03PR2
Region: Manufacturer listing for the named model/variant; regional equivalence has not been established
Firmware: Not specified by this source
Checked: 2026-10-04

Check the specified variant, required hub and installation instructions. Manufacturer claims are not independent performance tests.

Document check only; not a hands-on test or verification of every regional or firmware variant.

Sensors

Light

Shelly BLU Motion ZB

Yes

Catalog note

Built-in lux sensor reporting three levels (dark, twilight, bright) with configurable thresholds, 50 lx dark and 500 lx bright by default.

Sonoff SenseGuard Motion Gen2

Yes

Manufacturer source

An independent light sensor is included.

Sonoff SenseGuard Motion Gen2 — manufacturer product description →

Source section: Product description / feature descriptions
Model: SNZB-03PR2
Region: Manufacturer listing for the named model/variant; regional equivalence has not been established
Firmware: Not specified by this source
Checked: 2026-10-04

Check the specified variant, required hub and installation instructions. Manufacturer claims are not independent performance tests.

Document check only; not a hands-on test or verification of every regional or firmware variant.

Catalog note

Independent lux sensor reporting real illuminance values, not just a light or dark state

Motion

Shelly BLU Motion ZB

Yes

Manufacturer source

The ZB variant detects movement.

Shelly BLU Motion ZB manufacturer product page →

Source section: Product description
Model: Shelly BLU Motion ZB
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

This evidence is specific to BLU Motion ZB, not the earlier Bluetooth-only model.

Document check only; not a hands-on test or verification of every regional or firmware variant.

Catalog note

PYD1698 passive infrared (PIR) motion sensor.

Sonoff SenseGuard Motion Gen2

Yes

Catalog note

PIR infrared motion detection

Temperature

Shelly BLU Motion ZB: No
Catalog note
The specifications list only a PIR and a light sensor.
Sonoff SenseGuard Motion Gen2: No

Specifications for Shelly BLU Motion ZB versus Sonoff SenseGuard Motion Gen2
Specification	Shelly BLU Motion ZB	Sonoff SenseGuard Motion Gen2
Alerts
Low Battery Alerts	Yes Catalog note IAS Zone status bit 3 flags a battery at or below 15 percent, and the battery percentage is also broadcast over BTHome.	Not recorded
Motion Alerts	Yes Catalog note Every motion detection is broadcast as an event over BTHome and sent over Zigbee to the bound devices, and the app can push a notification when movement is detected.	Yes
Connectivity
2.4 GHz Wi-Fi	No	No
5 GHz Wi-Fi	No	No
Bluetooth	Yes Catalog note Bluetooth 5 (LE) broadcasting in the BTHome format, running simultaneously with Zigbee. Remote control needs a Shelly BLU Gateway or a Shelly Plus, Pro, Gen3 or Gen4 device as the bridge.	No
Thread	No	No
Z Wave	No	No
Zigbee	Zigbee Hub required Catalog note Zigbee 3.0 end device (IAS Zone 0x000D, profile 0x104, 802.15.4), so it joins an existing Zigbee coordinator.	Zigbee Hub required
Features
Angle Of Detection	Not recorded	120° Manufacturer source The stated sensing angle is 120 degrees. Sonoff SenseGuard Motion Gen2 — manufacturer product description → Source section Product description / feature descriptions Model SNZB-03PR2 Region Manufacturer listing for the named model/variant; regional equivalence has not been established Firmware Not specified by this source Checked 2026-10-04 Check the specified variant, required hub and installation instructions. Manufacturer claims are not independent performance tests. Document check only; not a hands-on test or verification of every regional or firmware variant.
Automations	Yes Catalog note Motion and light-level events trigger scenes and automations from the Shelly Smart Control app, and scripting is available through a gateway.	Yes
Detection Timeout	Yes Catalog note Motion hold time is configurable in seconds (60 by default): while movement continues the timer restarts, and a motion clear event is emitted once it expires.	60 seconds Catalog note Cooldown adjustable from 5 to 60 seconds
History Records	Not recorded	6 months Catalog note Illuminance history retained for up to 6 months
Motion Sensitivity	Yes Catalog note Three PIR sensitivity levels (low, medium, high), adjustable to cut false triggers from pets or distant movement.	Not recorded
Range Of Detection	Not recorded	6 m Manufacturer source The stated sensing range is six metres. Sonoff SenseGuard Motion Gen2 — manufacturer product description → Source section Product description / feature descriptions Model SNZB-03PR2 Region Manufacturer listing for the named model/variant; regional equivalence has not been established Firmware Not specified by this source Checked 2026-10-04 Check the specified variant, required hub and installation instructions. Manufacturer claims are not independent performance tests. Document check only; not a hands-on test or verification of every regional or firmware variant.
Integrations
Alexa	Shelly gateway required Catalog note Reaches Amazon Alexa through the Shelly Smart Control account, and the product page states that a compatible Bluetooth or Zigbee gateway is required for automations and app control.	Yes Catalog note Pairs to an Echo device with a built-in Zigbee hub, or through a SONOFF Zigbee hub
Apple Home	No Catalog note The device documentation lists only Bluetooth 5 LE and Zigbee 3.0, with no Matter or HomeKit profile, and Shelly's compatibility page names only Alexa, Google Home and SmartThings.	No
Google Home	Shelly gateway required Catalog note Reaches Google Home through the Shelly Smart Control account, and the product page states that a compatible Bluetooth or Zigbee gateway is required for automations and app control.	No
Home Assistant	Yes Catalog note Zigbee2MQTT supports this exact model (SBMO-103Z), exposing occupancy, battery, battery low, light level, the dark and bright thresholds and motion sensitivity. Over Bluetooth it also broadcasts BTHome, which Home Assistant reads natively.	Yes Catalog note Works through Zigbee2MQTT or ZHA with any Zigbee coordinator
Matter	No Catalog note Not in the CSA certified-product database under Shelly Europe Ltd., and the device documentation lists only Bluetooth 5 LE and Zigbee 3.0.	No
SmartThings	Shelly gateway required Catalog note Reaches SmartThings through the Shelly Smart Control account, and the product page states that a compatible Bluetooth or Zigbee gateway is required for automations and app control.	Not recorded Catalog note SONOFF lists SmartThings compatibility, but the available Edge driver covers the previous SNZB-03P and does not yet recognise this model
Power
Battery Life	5 years	3 years
Battery Type	1x CR2477	CR2477 Manufacturer source A CR2477 battery powers the sensor. Sonoff SenseGuard Motion Gen2 — manufacturer product description → Source section Product description / feature descriptions Model SNZB-03PR2 Region Manufacturer listing for the named model/variant; regional equivalence has not been established Firmware Not specified by this source Checked 2026-10-04 Check the specified variant, required hub and installation instructions. Manufacturer claims are not independent performance tests. Document check only; not a hands-on test or verification of every regional or firmware variant.
Sensors
Light	Yes Catalog note Built-in lux sensor reporting three levels (dark, twilight, bright) with configurable thresholds, 50 lx dark and 500 lx bright by default.	Yes Manufacturer source An independent light sensor is included. Sonoff SenseGuard Motion Gen2 — manufacturer product description → Source section Product description / feature descriptions Model SNZB-03PR2 Region Manufacturer listing for the named model/variant; regional equivalence has not been established Firmware Not specified by this source Checked 2026-10-04 Check the specified variant, required hub and installation instructions. Manufacturer claims are not independent performance tests. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Independent lux sensor reporting real illuminance values, not just a light or dark state
Motion	Yes Manufacturer source The ZB variant detects movement. Shelly BLU Motion ZB manufacturer product page → Source section Product description Model Shelly BLU Motion ZB Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 This evidence is specific to BLU Motion ZB, not the earlier Bluetooth-only model. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note PYD1698 passive infrared (PIR) motion sensor.	Yes Catalog note PIR infrared motion detection
Temperature	No Catalog note The specifications list only a PIR and a light sensor.	No

Know what’s behind the comparison.

The table matches specifications by section and field. It preserves notes, separates missing data from explicit “No” values, and keeps qualifications attached to their values. No overall winner is assigned from feature counts.

Read our comparison methodology