The Smart Device Compare comparison

Sonoff SNZB-02UL AirGuard E-Ink TH vs X-Sense STH0B Smart Thermometer Hygrometer

Understand the differences. Decide what matters to your home.

Before you compare every specification

Key differences between Sonoff SNZB-02UL AirGuard E-Ink TH and X-Sense STH0B Smart Thermometer Hygrometer

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

Feature differences among your selected devices

Other (connectivity): Sonoff SNZB-02UL AirGuard E-Ink TH — No; X-Sense STH0B Smart Thermometer Hygrometer — Yes (Proprietary 868.0-868.6 MHz radio link to the X-Sense SBS50 base station, which is the unit that carries the 2.4 GHz Wi-Fi connection (802.11b/g/n, not compatible with 5 GHz networks) | Range up to 500 m (1,640 ft) between the sensor and the base station in an open environment).
Screen (display): Sonoff SNZB-02UL AirGuard E-Ink TH — Yes (2.9 inch flexible dot-matrix E-Ink panel with a nearly 180 degree viewing angle, readable in bright light. Without a gateway it shows temperature and humidity plus the past 6 hours on a button press.); X-Sense STH0B Smart Thermometer Hygrometer — No (The sensor carries only a red/blue indicator light; every reading is shown in the X-Sense Home Security app).
Automations (features): Sonoff SNZB-02UL AirGuard E-Ink TH — Yes (Smart scenes trigger above or below a temperature or humidity threshold, or when the device goes offline, with a false alarm delay. The sensor is a trigger only, never an action.); X-Sense STH0B Smart Thermometer Hygrometer — No.
Google Home (integrations): Sonoff SNZB-02UL AirGuard E-Ink TH — Yes (SONOFF lists a Google Home temperature and humidity voice query, reached through the eWeLink cloud-to-cloud link.); X-Sense STH0B Smart Thermometer Hygrometer — No.

Specifications to check side by side

Zigbee (connectivity): Sonoff SNZB-02UL AirGuard E-Ink TH — Zigbee Hub required (Zigbee 3.0 (IEEE 802.15.4) end device. SONOFF lists the ZBBridge-P, ZBBridge-U, Bridge-M, NSPanel Pro and iHost as its own gateways, plus the Aeotec SmartThings Hub V3 and the Zigbee Echo models. Time, date and weather on the screen need a gateway or Home Assistant.); X-Sense STH0B Smart Thermometer Hygrometer — No.
Apple Home (integrations): Sonoff SNZB-02UL AirGuard E-Ink TH — SONOFF Hub required (The device is Zigbee, not HomeKit. SONOFF republishes it into the Apple Home app through its own Matter bridges (Bridge-M, ZBBridge-U, iHost, eWeLink CUBE).); X-Sense STH0B Smart Thermometer Hygrometer — No.
Matter (integrations): Sonoff SNZB-02UL AirGuard E-Ink TH — SONOFF Hub required (Not a Matter device itself: SONOFF bridges it into Matter through the Bridge-M, ZBBridge-U, iHost or eWeLink CUBE.); X-Sense STH0B Smart Thermometer Hygrometer — No (The CSA certified-products database lists no X-Sense entry for this model, and the SBS50 base station it reports through is not Matter certified either).
Battery Life (power): Sonoff SNZB-02UL AirGuard E-Ink TH — 8+ months; X-Sense STH0B Smart Thermometer Hygrometer — 1 year.

Information still to confirm

9 of 35 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 · Sonoff

Sonoff SNZB-02UL AirGuard E-Ink TH

Last updated October 2026

View full device profile

Option 2 · X-Sense

X-Sense STH0B Smart Thermometer Hygrometer

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.

9differences with recorded values for every device

9rows with missing or unspecified information

Consider your setup

Apple Home

Sonoff SNZB-02UL AirGuard E-Ink THSONOFF Hub required
X-Sense STH0B Smart Thermometer HygrometerNo

Confirm which features appear in Apple Home and whether extra hardware or a subscription is needed for your intended use.

Inspect the specifications

Consider your setup

Matter

Sonoff SNZB-02UL AirGuard E-Ink THSONOFF Hub required
X-Sense STH0B Smart Thermometer HygrometerNo

Confirm the exact device type and the features exposed in your chosen platform. Protocol support does not establish feature parity across apps.

Inspect the specifications

Consider your setup

Battery Life

Sonoff SNZB-02UL AirGuard E-Ink TH8+ months
X-Sense STH0B Smart Thermometer Hygrometer1 year

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 35 of 35 rows. “Not recorded” does not mean “No”.

Reading layout

Alerts

Air Quality Alerts

Sonoff SNZB-02UL AirGuard E-Ink TH: No
X-Sense STH0B Smart Thermometer Hygrometer: No

Humidity Alerts

Sonoff SNZB-02UL AirGuard E-Ink TH: Yes
X-Sense STH0B Smart Thermometer Hygrometer: Yes
Catalog note
A humidity range is set in the app and triggers the same push notification and base station alarm as the temperature range

Low Battery Alerts

Sonoff SNZB-02UL AirGuard E-Ink TH: Not recorded
X-Sense STH0B Smart Thermometer Hygrometer: Yes
Catalog note
The app prompts a low battery warning and the indicator light flashes once every 60 seconds

Temperature Alerts

Sonoff SNZB-02UL AirGuard E-Ink TH: Yes
Catalog note
A custom comfort range, one of six presets or edited by hand, pushes a phone notification when the reading leaves the band.
X-Sense STH0B Smart Thermometer Hygrometer: Yes
Catalog note
A temperature range is set in the app; crossing it sends a push notification and sounds the base station, which can be muted so only the notification arrives

Connectivity

2.4 GHz Wi-Fi

Sonoff SNZB-02UL AirGuard E-Ink TH: No
X-Sense STH0B Smart Thermometer Hygrometer: No

5 GHz Wi-Fi

Sonoff SNZB-02UL AirGuard E-Ink TH: No
X-Sense STH0B Smart Thermometer Hygrometer: No

Bluetooth

Sonoff SNZB-02UL AirGuard E-Ink TH: No
X-Sense STH0B Smart Thermometer Hygrometer: No

Other

Sonoff SNZB-02UL AirGuard E-Ink TH: No
X-Sense STH0B Smart Thermometer Hygrometer: Yes
Catalog note
Proprietary 868.0-868.6 MHz radio link to the X-Sense SBS50 base station, which is the unit that carries the 2.4 GHz Wi-Fi connection (802.11b/g/n, not compatible with 5 GHz networks) | Range up to 500 m (1,640 ft) between the sensor and the base station in an open environment

Thread

Sonoff SNZB-02UL AirGuard E-Ink TH: No
X-Sense STH0B Smart Thermometer Hygrometer: No

Z Wave

Sonoff SNZB-02UL AirGuard E-Ink TH: No
X-Sense STH0B Smart Thermometer Hygrometer: No

Zigbee

Sonoff SNZB-02UL AirGuard E-Ink TH: Zigbee Hub required
Catalog note
Zigbee 3.0 (IEEE 802.15.4) end device. SONOFF lists the ZBBridge-P, ZBBridge-U, Bridge-M, NSPanel Pro and iHost as its own gateways, plus the Aeotec SmartThings Hub V3 and the Zigbee Echo models. Time, date and weather on the screen need a gateway or Home Assistant.
X-Sense STH0B Smart Thermometer Hygrometer: No

Display

Color Screen

Sonoff SNZB-02UL AirGuard E-Ink TH: No
X-Sense STH0B Smart Thermometer Hygrometer: Not applicable / unspecified

Date

Sonoff SNZB-02UL AirGuard E-Ink TH: Yes
Catalog note
The screen displays the date once the device is connected to a gateway or Home Assistant.
X-Sense STH0B Smart Thermometer Hygrometer: Not applicable / unspecified

Screen

Sonoff SNZB-02UL AirGuard E-Ink TH: Yes
Catalog note
2.9 inch flexible dot-matrix E-Ink panel with a nearly 180 degree viewing angle, readable in bright light. Without a gateway it shows temperature and humidity plus the past 6 hours on a button press.
X-Sense STH0B Smart Thermometer Hygrometer: No
Catalog note
The sensor carries only a red/blue indicator light; every reading is shown in the X-Sense Home Security app

Screen Resolution

Sonoff SNZB-02UL AirGuard E-Ink TH: Not recorded
X-Sense STH0B Smart Thermometer Hygrometer: Not applicable / unspecified

Screen Size

Sonoff SNZB-02UL AirGuard E-Ink TH

2.9"

Manufacturer source

The screen measures 2.9 inches.

Sonoff SNZB-02UL AirGuard E-Ink TH manufacturer product page →

Source section: Product description
Model: Sonoff SNZB-02UL AirGuard E-Ink TH
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

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

X-Sense STH0B Smart Thermometer Hygrometer

Not applicable / unspecified

Screen Type

Sonoff SNZB-02UL AirGuard E-Ink TH

E-Ink

Manufacturer source

The screen uses E-Ink.

Sonoff SNZB-02UL AirGuard E-Ink TH manufacturer product page →

Source section: Product description
Model: Sonoff SNZB-02UL AirGuard E-Ink TH
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

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

X-Sense STH0B Smart Thermometer Hygrometer

Not applicable / unspecified

Time

Sonoff SNZB-02UL AirGuard E-Ink TH: Yes
Catalog note
The screen displays the current time once the device is connected to a gateway or Home Assistant.
X-Sense STH0B Smart Thermometer Hygrometer: Not applicable / unspecified

Touch Screen

Sonoff SNZB-02UL AirGuard E-Ink TH: No
Catalog note
A single button on the back handles the 6-hour history recall, the temperature unit switch and pairing.
X-Sense STH0B Smart Thermometer Hygrometer: Not applicable / unspecified

Weather Forecast

Sonoff SNZB-02UL AirGuard E-Ink TH: Yes
Catalog note
Once paired to a SONOFF Zigbee gateway or Home Assistant, the screen shows a weather icon and weather information alongside the reading.
X-Sense STH0B Smart Thermometer Hygrometer: Not applicable / unspecified

Features

Automations

Sonoff SNZB-02UL AirGuard E-Ink TH: Yes
Catalog note
Smart scenes trigger above or below a temperature or humidity threshold, or when the device goes offline, with a false alarm delay. The sensor is a trigger only, never an action.
X-Sense STH0B Smart Thermometer Hygrometer: No

History Records

Sonoff SNZB-02UL AirGuard E-Ink TH: Yes
Catalog note
Six hours of temperature and humidity history on the screen without a gateway, and up to six months of temperature, humidity, dew point and VPD curves in the app or Home Assistant, with CSV export.
X-Sense STH0B Smart Thermometer Hygrometer: Yes
Catalog note
The app keeps 24/7 graphs with maximum, minimum and average readings plus dew point and VPD, and exports up to 180 days per CSV file, with daily, weekly or monthly scheduled exports

Integrations

Alexa

Sonoff SNZB-02UL AirGuard E-Ink TH: Yes
Catalog note
SONOFF lists Alexa temperature and humidity queries, and an Echo with a built-in Zigbee hub (Echo Plus 2nd, Echo 4th, Echo Show 2nd) as a compatible gateway.
X-Sense STH0B Smart Thermometer Hygrometer: Yes
Catalog note
The official product page lists Alexa Compatible, with voice queries for the temperature and humidity readings

Apple Home

Sonoff SNZB-02UL AirGuard E-Ink TH: SONOFF Hub required
Catalog note
The device is Zigbee, not HomeKit. SONOFF republishes it into the Apple Home app through its own Matter bridges (Bridge-M, ZBBridge-U, iHost, eWeLink CUBE).
X-Sense STH0B Smart Thermometer Hygrometer: No

Google Home

Sonoff SNZB-02UL AirGuard E-Ink TH: Yes
Catalog note
SONOFF lists a Google Home temperature and humidity voice query, reached through the eWeLink cloud-to-cloud link.
X-Sense STH0B Smart Thermometer Hygrometer: No

Home Assistant

Sonoff SNZB-02UL AirGuard E-Ink TH: Yes
Catalog note
Zigbee2MQTT works out of the box, while ZHA needs the script SONOFF publishes in its help center for the advanced functions such as the remote sensor display and the weather data.
X-Sense STH0B Smart Thermometer Hygrometer: Yes
Catalog note
The X-Sense Home Security custom integration for Home Assistant (HACS) names STH0B among the thermometer/hygrometer models it maps, and reads it from the X-Sense cloud account

Matter

Sonoff SNZB-02UL AirGuard E-Ink TH: SONOFF Hub required
Catalog note
Not a Matter device itself: SONOFF bridges it into Matter through the Bridge-M, ZBBridge-U, iHost or eWeLink CUBE.
X-Sense STH0B Smart Thermometer Hygrometer: No
Catalog note
The CSA certified-products database lists no X-Sense entry for this model, and the SBS50 base station it reports through is not Matter certified either

SmartThings

Sonoff SNZB-02UL AirGuard E-Ink TH: Yes
Catalog note
SONOFF lists the Aeotec SmartThings Hub V3 as a compatible Zigbee gateway, with a SmartThings temperature and humidity query.
X-Sense STH0B Smart Thermometer Hygrometer: No

Power

Battery Life

Sonoff SNZB-02UL AirGuard E-Ink TH: 8+ months
X-Sense STH0B Smart Thermometer Hygrometer: 1 year

Battery Type

Sonoff SNZB-02UL AirGuard E-Ink TH: 2x AAA
X-Sense STH0B Smart Thermometer Hygrometer: 2x AAA

Sensors

Air Quality

Sonoff SNZB-02UL AirGuard E-Ink TH: No
X-Sense STH0B Smart Thermometer Hygrometer: No

Atmospheric Pressure

Sonoff SNZB-02UL AirGuard E-Ink TH: No
X-Sense STH0B Smart Thermometer Hygrometer: No

Humidity

Sonoff SNZB-02UL AirGuard E-Ink TH

Yes

Manufacturer source

The sensor measures relative humidity.

Sonoff SNZB-02UL AirGuard E-Ink TH manufacturer product page →

Source section: Product description
Model: Sonoff SNZB-02UL AirGuard E-Ink TH
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

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

Catalog note

Accuracy of plus or minus 2% RH, refreshed every 5 seconds, with dew point and VPD calculated from the temperature and humidity readings.

X-Sense STH0B Smart Thermometer Hygrometer

Yes

Catalog note

Operating range 0-100% RH, typical accuracy +/-2% RH between 10 and 90% RH

Occupancy

Sonoff SNZB-02UL AirGuard E-Ink TH: No
X-Sense STH0B Smart Thermometer Hygrometer: No

Temperature

Sonoff SNZB-02UL AirGuard E-Ink TH

Yes

Manufacturer source

The sensor measures air temperature.

Sonoff SNZB-02UL AirGuard E-Ink TH manufacturer product page →

Source section: Product description
Model: Sonoff SNZB-02UL AirGuard E-Ink TH
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

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

Catalog note

Swiss Sensirion sensor, accuracy of plus or minus 0.2 C (plus or minus 0.4 F), refreshed every 5 seconds. Screen and app resolve to 0.1 C.

X-Sense STH0B Smart Thermometer Hygrometer

Yes

Catalog note

Operating range -20 to 60 C (-4 to 140 F), typical accuracy +/-0.2 C (+/-0.36 F) between 0 and 60 C

Specifications for Sonoff SNZB-02UL AirGuard E-Ink TH versus X-Sense STH0B Smart Thermometer Hygrometer
Specification	Sonoff SNZB-02UL AirGuard E-Ink TH	X-Sense STH0B Smart Thermometer Hygrometer
Alerts
Air Quality Alerts	No	No
Humidity Alerts	Yes	Yes Catalog note A humidity range is set in the app and triggers the same push notification and base station alarm as the temperature range
Low Battery Alerts	Not recorded	Yes Catalog note The app prompts a low battery warning and the indicator light flashes once every 60 seconds
Temperature Alerts	Yes Catalog note A custom comfort range, one of six presets or edited by hand, pushes a phone notification when the reading leaves the band.	Yes Catalog note A temperature range is set in the app; crossing it sends a push notification and sounds the base station, which can be muted so only the notification arrives
Connectivity
2.4 GHz Wi-Fi	No	No
5 GHz Wi-Fi	No	No
Bluetooth	No	No
Other	No	Yes Catalog note Proprietary 868.0-868.6 MHz radio link to the X-Sense SBS50 base station, which is the unit that carries the 2.4 GHz Wi-Fi connection (802.11b/g/n, not compatible with 5 GHz networks) \| Range up to 500 m (1,640 ft) between the sensor and the base station in an open environment
Thread	No	No
Z Wave	No	No
Zigbee	Zigbee Hub required Catalog note Zigbee 3.0 (IEEE 802.15.4) end device. SONOFF lists the ZBBridge-P, ZBBridge-U, Bridge-M, NSPanel Pro and iHost as its own gateways, plus the Aeotec SmartThings Hub V3 and the Zigbee Echo models. Time, date and weather on the screen need a gateway or Home Assistant.	No
Display
Color Screen	No	Not applicable / unspecified
Date	Yes Catalog note The screen displays the date once the device is connected to a gateway or Home Assistant.	Not applicable / unspecified
Screen	Yes Catalog note 2.9 inch flexible dot-matrix E-Ink panel with a nearly 180 degree viewing angle, readable in bright light. Without a gateway it shows temperature and humidity plus the past 6 hours on a button press.	No Catalog note The sensor carries only a red/blue indicator light; every reading is shown in the X-Sense Home Security app
Screen Resolution	Not recorded	Not applicable / unspecified
Screen Size	2.9" Manufacturer source The screen measures 2.9 inches. Sonoff SNZB-02UL AirGuard E-Ink TH manufacturer product page → Source section Product description Model Sonoff SNZB-02UL AirGuard E-Ink TH Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Document check only; not a hands-on test or verification of every regional or firmware variant.	Not applicable / unspecified
Screen Type	E-Ink Manufacturer source The screen uses E-Ink. Sonoff SNZB-02UL AirGuard E-Ink TH manufacturer product page → Source section Product description Model Sonoff SNZB-02UL AirGuard E-Ink TH Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Document check only; not a hands-on test or verification of every regional or firmware variant.	Not applicable / unspecified
Time	Yes Catalog note The screen displays the current time once the device is connected to a gateway or Home Assistant.	Not applicable / unspecified
Touch Screen	No Catalog note A single button on the back handles the 6-hour history recall, the temperature unit switch and pairing.	Not applicable / unspecified
Weather Forecast	Yes Catalog note Once paired to a SONOFF Zigbee gateway or Home Assistant, the screen shows a weather icon and weather information alongside the reading.	Not applicable / unspecified
Features
Automations	Yes Catalog note Smart scenes trigger above or below a temperature or humidity threshold, or when the device goes offline, with a false alarm delay. The sensor is a trigger only, never an action.	No
History Records	Yes Catalog note Six hours of temperature and humidity history on the screen without a gateway, and up to six months of temperature, humidity, dew point and VPD curves in the app or Home Assistant, with CSV export.	Yes Catalog note The app keeps 24/7 graphs with maximum, minimum and average readings plus dew point and VPD, and exports up to 180 days per CSV file, with daily, weekly or monthly scheduled exports
Integrations
Alexa	Yes Catalog note SONOFF lists Alexa temperature and humidity queries, and an Echo with a built-in Zigbee hub (Echo Plus 2nd, Echo 4th, Echo Show 2nd) as a compatible gateway.	Yes Catalog note The official product page lists Alexa Compatible, with voice queries for the temperature and humidity readings
Apple Home	SONOFF Hub required Catalog note The device is Zigbee, not HomeKit. SONOFF republishes it into the Apple Home app through its own Matter bridges (Bridge-M, ZBBridge-U, iHost, eWeLink CUBE).	No
Google Home	Yes Catalog note SONOFF lists a Google Home temperature and humidity voice query, reached through the eWeLink cloud-to-cloud link.	No
Home Assistant	Yes Catalog note Zigbee2MQTT works out of the box, while ZHA needs the script SONOFF publishes in its help center for the advanced functions such as the remote sensor display and the weather data.	Yes Catalog note The X-Sense Home Security custom integration for Home Assistant (HACS) names STH0B among the thermometer/hygrometer models it maps, and reads it from the X-Sense cloud account
Matter	SONOFF Hub required Catalog note Not a Matter device itself: SONOFF bridges it into Matter through the Bridge-M, ZBBridge-U, iHost or eWeLink CUBE.	No Catalog note The CSA certified-products database lists no X-Sense entry for this model, and the SBS50 base station it reports through is not Matter certified either
SmartThings	Yes Catalog note SONOFF lists the Aeotec SmartThings Hub V3 as a compatible Zigbee gateway, with a SmartThings temperature and humidity query.	No
Power
Battery Life	8+ months	1 year
Battery Type	2x AAA	2x AAA
Sensors
Air Quality	No	No
Atmospheric Pressure	No	No
Humidity	Yes Manufacturer source The sensor measures relative humidity. Sonoff SNZB-02UL AirGuard E-Ink TH manufacturer product page → Source section Product description Model Sonoff SNZB-02UL AirGuard E-Ink TH Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Accuracy of plus or minus 2% RH, refreshed every 5 seconds, with dew point and VPD calculated from the temperature and humidity readings.	Yes Catalog note Operating range 0-100% RH, typical accuracy +/-2% RH between 10 and 90% RH
Occupancy	No	No
Temperature	Yes Manufacturer source The sensor measures air temperature. Sonoff SNZB-02UL AirGuard E-Ink TH manufacturer product page → Source section Product description Model Sonoff SNZB-02UL AirGuard E-Ink TH Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Swiss Sensirion sensor, accuracy of plus or minus 0.2 C (plus or minus 0.4 F), refreshed every 5 seconds. Screen and app resolve to 0.1 C.	Yes Catalog note Operating range -20 to 60 C (-4 to 140 F), typical accuracy +/-0.2 C (+/-0.36 F) between 0 and 60 C

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