Option 1 · Sonoff
Sonoff SNZB-02M AirGuard TH Pressure Sensor
Last updated October 2026
View full device profileThe Smart Device Compare comparison
Sonoff SNZB-02M AirGuard TH Pressure Sensor vs Sonoff SNZB-02UL AirGuard E-Ink TH
Understand the differences. Decide what matters to your home.
Build another comparison →Before you compare every specification
Key differences between Sonoff SNZB-02M AirGuard TH Pressure Sensor and Sonoff SNZB-02UL AirGuard E-Ink TH
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
- Screen (display): Sonoff SNZB-02M AirGuard TH Pressure Sensor — No; 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.).
- Atmospheric Pressure (sensors): Sonoff SNZB-02M AirGuard TH Pressure Sensor — Yes; Sonoff SNZB-02UL AirGuard E-Ink TH — No.
Specifications to check side by side
- Battery Life (power): Sonoff SNZB-02M AirGuard TH Pressure Sensor — 2 years; Sonoff SNZB-02UL AirGuard E-Ink TH — 8+ months.
- Battery Type (power): Sonoff SNZB-02M AirGuard TH Pressure Sensor — CR2477; Sonoff SNZB-02UL AirGuard E-Ink TH — 2x AAA.
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 2 · Sonoff
Sonoff SNZB-02UL AirGuard E-Ink TH
Last updated October 2026
View full device profileWhat 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.
4differences with recorded values for every device
9rows with missing or unspecified information
Consider your setup
Battery Life
- Sonoff SNZB-02M AirGuard TH Pressure Sensor2 years
- Sonoff SNZB-02UL AirGuard E-Ink TH8+ months
Compare the stated test conditions. Catalog battery figures alone do not predict runtime in your home.
Inspect the specificationsYour 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.
Showing 35 of 35 rows. “Not recorded” does not mean “No”.
Alerts
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- No
- Sonoff SNZB-02UL AirGuard E-Ink TH
- No
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- Yes
- Sonoff SNZB-02UL AirGuard E-Ink TH
- Yes
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- Yes
- Sonoff SNZB-02UL AirGuard E-Ink TH
- Not recorded
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- Yes
- 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.
Connectivity
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- No
- Sonoff SNZB-02UL AirGuard E-Ink TH
- No
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- No
- Sonoff SNZB-02UL AirGuard E-Ink TH
- No
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- No
- Sonoff SNZB-02UL AirGuard E-Ink TH
- No
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- No
- Sonoff SNZB-02UL AirGuard E-Ink TH
- No
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- No
- Sonoff SNZB-02UL AirGuard E-Ink TH
- No
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- No
- Sonoff SNZB-02UL AirGuard E-Ink TH
- No
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- Zigbee Hub required
- 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.
Display
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- Not applicable / unspecified
- Sonoff SNZB-02UL AirGuard E-Ink TH
- No
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- Not applicable / unspecified
- 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.
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- No
- 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.
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- Not applicable / unspecified
- Sonoff SNZB-02UL AirGuard E-Ink TH
- Not recorded
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- Not applicable / unspecified
- 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
Document check only; not a hands-on test or verification of every regional or firmware variant.
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- Not applicable / unspecified
- 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
Document check only; not a hands-on test or verification of every regional or firmware variant.
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- Not applicable / unspecified
- 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.
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- Not applicable / unspecified
- 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.
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- Not applicable / unspecified
- 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.
Features
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- Yes
- 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.
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- Yes
- 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.
Integrations
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- Yes
- 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.
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- SONOFF Hub required
- 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).
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- Yes
- 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.
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- Yes
- 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.
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- SONOFF Hub required
- 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.
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- Yes
- 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.
Power
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- 2 years
- Sonoff SNZB-02UL AirGuard E-Ink TH
- 8+ months
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- CR2477
Manufacturer source
A CR2477 battery powers the sensor.
Sonoff SNZB-02M AirGuard TH Pressure Sensor manufacturer product page →- Source section
- Product description
- Model
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- Region
- Manufacturer product page; no universal regional compatibility implied
- Firmware
- Not specified by this source
- Checked
Document check only; not a hands-on test or verification of every regional or firmware variant.
- Sonoff SNZB-02UL AirGuard E-Ink TH
- 2x AAA
Sensors
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- No
- Sonoff SNZB-02UL AirGuard E-Ink TH
- No
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- Yes
Manufacturer source
The device measures air pressure.
Sonoff SNZB-02M AirGuard TH Pressure Sensor manufacturer product page →- Source section
- Product description
- Model
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- Region
- Manufacturer product page; no universal regional compatibility implied
- Firmware
- Not specified by this source
- Checked
Document check only; not a hands-on test or verification of every regional or firmware variant.
- Sonoff SNZB-02UL AirGuard E-Ink TH
- No
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- Yes
Manufacturer source
The sensor measures relative humidity.
Sonoff SNZB-02M AirGuard TH Pressure Sensor manufacturer product page →- Source section
- Product description
- Model
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- Region
- Manufacturer product page; no universal regional compatibility implied
- Firmware
- Not specified by this source
- Checked
Document check only; not a hands-on test or verification of every regional or firmware variant.
- 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
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.
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- No
- Sonoff SNZB-02UL AirGuard E-Ink TH
- No
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- Yes
Manufacturer source
The sensor measures air temperature.
Sonoff SNZB-02M AirGuard TH Pressure Sensor manufacturer product page →- Source section
- Product description
- Model
- Sonoff SNZB-02M AirGuard TH Pressure Sensor
- Region
- Manufacturer product page; no universal regional compatibility implied
- Firmware
- Not specified by this source
- Checked
Document check only; not a hands-on test or verification of every regional or firmware variant.
- 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
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.
| Specification | Sonoff SNZB-02M AirGuard TH Pressure Sensor | Sonoff SNZB-02UL AirGuard E-Ink TH |
|---|---|---|
| Alerts | ||
| No | No | |
| Yes | Yes | |
| Yes | Not recorded | |
| Yes | YesCatalog noteA custom comfort range, one of six presets or edited by hand, pushes a phone notification when the reading leaves the band. | |
| Connectivity | ||
| No | No | |
| No | No | |
| No | No | |
| No | No | |
| No | No | |
| No | No | |
| Zigbee Hub required | Zigbee Hub requiredCatalog noteZigbee 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. | |
| Display | ||
| Not applicable / unspecified | No | |
| Not applicable / unspecified | YesCatalog noteThe screen displays the date once the device is connected to a gateway or Home Assistant. | |
| No | YesCatalog note2.9 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. | |
| Not applicable / unspecified | Not recorded | |
| Not applicable / unspecified | 2.9"Manufacturer sourceThe screen measures 2.9 inches. Sonoff SNZB-02UL AirGuard E-Ink TH manufacturer product page →
Document check only; not a hands-on test or verification of every regional or firmware variant. | |
| Not applicable / unspecified | E-InkManufacturer sourceThe screen uses E-Ink. Sonoff SNZB-02UL AirGuard E-Ink TH manufacturer product page →
Document check only; not a hands-on test or verification of every regional or firmware variant. | |
| Not applicable / unspecified | YesCatalog noteThe screen displays the current time once the device is connected to a gateway or Home Assistant. | |
| Not applicable / unspecified | NoCatalog noteA single button on the back handles the 6-hour history recall, the temperature unit switch and pairing. | |
| Not applicable / unspecified | YesCatalog noteOnce paired to a SONOFF Zigbee gateway or Home Assistant, the screen shows a weather icon and weather information alongside the reading. | |
| Features | ||
| Yes | YesCatalog noteSmart 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. | |
| Yes | YesCatalog noteSix 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. | |
| Integrations | ||
| Yes | YesCatalog noteSONOFF 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. | |
| SONOFF Hub required | SONOFF Hub requiredCatalog noteThe 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). | |
| Yes | YesCatalog noteSONOFF lists a Google Home temperature and humidity voice query, reached through the eWeLink cloud-to-cloud link. | |
| Yes | YesCatalog noteZigbee2MQTT 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. | |
| SONOFF Hub required | SONOFF Hub requiredCatalog noteNot a Matter device itself: SONOFF bridges it into Matter through the Bridge-M, ZBBridge-U, iHost or eWeLink CUBE. | |
| Yes | YesCatalog noteSONOFF lists the Aeotec SmartThings Hub V3 as a compatible Zigbee gateway, with a SmartThings temperature and humidity query. | |
| Power | ||
| 2 years | 8+ months | |
CR2477Manufacturer sourceA CR2477 battery powers the sensor. Sonoff SNZB-02M AirGuard TH Pressure Sensor manufacturer product page →
Document check only; not a hands-on test or verification of every regional or firmware variant. | 2x AAA | |
| Sensors | ||
| No | No | |
YesManufacturer sourceThe device measures air pressure. Sonoff SNZB-02M AirGuard TH Pressure Sensor manufacturer product page →
Document check only; not a hands-on test or verification of every regional or firmware variant. | No | |
YesManufacturer sourceThe sensor measures relative humidity. Sonoff SNZB-02M AirGuard TH Pressure Sensor manufacturer product page →
Document check only; not a hands-on test or verification of every regional or firmware variant. | YesManufacturer sourceThe sensor measures relative humidity. Sonoff SNZB-02UL AirGuard E-Ink TH manufacturer product page →
Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog noteAccuracy of plus or minus 2% RH, refreshed every 5 seconds, with dew point and VPD calculated from the temperature and humidity readings. | |
| No | No | |
YesManufacturer sourceThe sensor measures air temperature. Sonoff SNZB-02M AirGuard TH Pressure Sensor manufacturer product page →
Document check only; not a hands-on test or verification of every regional or firmware variant. | YesManufacturer sourceThe sensor measures air temperature. Sonoff SNZB-02UL AirGuard E-Ink TH manufacturer product page →
Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog noteSwiss 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. | |
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