Updated October 2026
Data from the official Shelly and Sonoff sites.
2026 verdict
A screen and a higher water rating tip this one to the Sonoff SNZB-02WD over the Shelly BLU H&T ZB.
The Sonoff has an LCD on the device, an IP65 shell, a Zigbee coordinator for a hub, and reach into Google Home, Alexa, SmartThings, Home Assistant and Apple Home and Matter through a Sonoff bridge. The Shelly BLU H&T ZB is the one that carries two radios, Bluetooth 5 LE and Zigbee, in a 37 x 37 x 10 mm square that runs about three years on a CR2032, with an IP54 rating for damp rooms. Pick the Sonoff SNZB-02WD for a readable, weather-rated sensor on a Zigbee network, and the Shelly BLU H&T ZB when a tiny, long-lasting sensor with Bluetooth as well as Zigbee matters more than a display.
vs
Winner
News by email
Still comparing? Get what's new by email
New releases and the smart home news worth knowing, in your inbox.
No spam. Unsubscribe in one click.
| Feature | Shelly BLU H&T ZB | Sonoff SNZB-02WD | Winner |
|---|---|---|---|
| Price | $22.99 | $19.90 | Sonoff SNZB-02WD |
| Rating | 4.4 | 4.3 | Shelly BLU H&T ZB |
| Connectivity | Bluetooth, Zigbee | Zigbee | Shelly BLU H&T ZB |
| Screen | NO | YES | Sonoff SNZB-02WD |
| Integrations | Google Home, Alexa, Samsung SmartThings, Home Assistant | Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Sonoff SNZB-02WD |
| Warranty | 2 years | 2 years | Tie |
| Sensors | Temperature, Humidity | Temperature, Humidity | Tie |
| Alerts | Temperature Alerts, Humidity Alerts | Temperature Alerts, Humidity Alerts | Tie |
What the differences mean
Screen
The Sonoff SNZB-02WD has an LCD that shows temperature and humidity on the device. The Shelly BLU H&T ZB has no screen, only a button and one red LED, so its readings live in a hub, an app or a dashboard.
Radios
The Shelly BLU H&T ZB carries Bluetooth 5 LE and Zigbee, so it fits a Zigbee coordinator or a Shelly gateway and can be read over Bluetooth. The Sonoff SNZB-02WD is Zigbee only and needs a coordinator before it reports at all.
Weather rating
Both are built for damp places, but not to the same level. The Sonoff SNZB-02WD is IP65, protected against dust and water jets, while the Shelly BLU H&T ZB is IP54, rated against dust and splashes only.
Platforms
The Sonoff SNZB-02WD reaches Google Home, Alexa, SmartThings, Home Assistant and, through a Sonoff bridge, Apple Home and Matter. The Shelly BLU H&T ZB reaches Alexa, Google Home and SmartThings only through a Shelly gateway, has Home Assistant over Zigbee, and has no Matter or Apple path.
Battery and size
The Shelly BLU H&T ZB is a 13 g square rated for about three years on a CR2032. The Sonoff SNZB-02WD is a much bigger 62.8 x 58.5 x 21.8 mm, 65.6 g body on a CR2477 with no published battery life, so the Shelly is the safer bet for a tiny sensor and a long, predictable change interval.
Which one to buy if
- you want the reading on the device
The Sonoff SNZB-02WD has an LCD; the Shelly BLU H&T ZB has no screen.
- you want Bluetooth as well as Zigbee
The Shelly BLU H&T ZB carries both radios, so it can join a Zigbee mesh or be read over Bluetooth by a Shelly gateway.
- the sensor will get rained on or hosed
The Sonoff SNZB-02WD is IP65, a higher level of water protection than the IP54 of the Shelly BLU H&T ZB.
- you already run a Shelly setup
The Shelly BLU H&T ZB slots into the Shelly ecosystem and its gateway, exposing readings in the Shelly account and Home Assistant.
$22.99
- + Rating: 4.4
- + Connectivity: Bluetooth, Zigbee
- - Price: $22.99 vs $19.90
- - Screen: NO vs YES
Winner
$19.90
- + Price: $19.90
- + Screen: YES
- + Integrations: Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
- - Rating: 4.3 vs 4.4
- - Connectivity: Zigbee vs Bluetooth, Zigbee
What owners say
Owners of the Sonoff SNZB-02WD describe the IP65 rating and the LCD as the two reasons they bought it, letting them place it in garages, greenhouses and bathrooms and still read the temperature and humidity on the device. Pairing with ZHA and Zigbee2MQTT is repeatedly called fast and reliable, the magnetic battery door is praised as an improvement, and several report strong battery performance. Their complaints are that it is Zigbee only and needs a hub, that Apple Home works only through a SONOFF Matter bridge, that the reporting interval feels slow for some monitoring, and that it uses a less common CR2477-style cell that is awkward to keep as a spare.
Frequently Asked Questions
Which is better overall: Shelly BLU H&T ZB or Sonoff SNZB-02WD?
The Sonoff SNZB-02WD for most buyers, because it adds a screen and a higher IP65 water rating on the same Zigbee job. The Shelly BLU H&T ZB is the better pick when the sensor has to be tiny and long-lasting, or when Bluetooth as well as Zigbee is useful.
What is the biggest difference between the Shelly BLU H&T ZB and the Sonoff SNZB-02WD?
A screen and a water rating. The Sonoff SNZB-02WD has an LCD and is IP65 rated, while the Shelly BLU H&T ZB has no screen but is a 13 g square with both Bluetooth 5 LE and Zigbee and a slightly lower IP54 rating.
Which is more water resistant, the Shelly BLU H&T ZB or the Sonoff SNZB-02WD?
The Sonoff SNZB-02WD at IP65, protected against dust and water jets. The Shelly BLU H&T ZB is IP54, rated against dust and splashes, which is good for a bathroom but less than the Sonoff.
Does the Shelly BLU H&T ZB have a screen?
No. The Shelly BLU H&T ZB is the display-less model in the BLU H&T family, with a single button and one red LED, and its readings are delivered over Bluetooth or Zigbee.
Does the Sonoff SNZB-02WD work with Home Assistant?
Yes. The Sonoff SNZB-02WD is supported by Zigbee2MQTT and ZHA, and owners report it pairing quickly. It is Zigbee only, so it still needs a coordinator.
Does the Shelly BLU H&T ZB work with Apple Home?
No. The Shelly BLU H&T ZB documents only Bluetooth 5 LE and Zigbee, with no Matter or HomeKit profile. The Sonoff SNZB-02WD can reach Apple Home through a Sonoff Matter bridge, and the Shelly cannot.
Our store on AmazonShop our ideas on AmazonLists of the smart home setups we would put together ourselves, ready to add to your Amazon cart.Shop on AmazonFull comparison table
Compare all 36 Temperature & Humidity Sensors side by side
You are looking at two of them. The full table lines up all Temperature & Humidity Sensors in the catalog with the same specs, so you can filter by what you need and sort by price or rating.
- 36 Temperature & Humidity Sensors
- 43 specs compared
- 39 filters
SonoffSNZB-02UL AirGuard E-Ink TH
$24.90
YoLinkSmart Wireless Thermometer Hygrometer
$18.99
GoogleNest Temperature Sensor
$39.00
EcobeeSmartSensor
$98.50
SwitchBotMeter Pro
$19.99
SwitchBotMeter Plus
15% OFF$17.99$15.29
GoveeHygrometer Thermometer H5104
Unavailable
X-SenseSmart WiFi Indoor Thermometer
23% OFF
$14.99$11.49
X-SenseSTH0B Smart Thermometer Hygrometer
23% OFF$14.99$11.49
AeotecMultipurpose Sensor
$37.99
GoogleNest Temperature Sensor (2nd gen)
$39.98
SonoffSNZB-02DR2 AirGuard TH
$14.90- Shelly
BLU H&T ZB
$22.99 
ShellyBLU H&T Display ZB
$25.99- Sonoff
SNZB-02WD
$19.90 
SensiEmerson Room Sensor
$45.88
SwitchBotMeter
$13.99
SwitchBotIndoor/Outdoor Thermo-Hygrometer
15% OFF$14.99$12.74
AqaraTemperature and Humidity Sensor
$19.98
SonoffLCD Smart Temperature Humidity Sensor
$15.90
ButtonsShellyBLU Button Tough 1 ZB
4.7(12)Unavailable
ButtonsShellyBLU RC Button 4 ZB
4.0(25)$23.99
CamerasShellyCamera
DisplaysShellyWall Display X1i
€188.35
DisplaysShellyWall Display XL
4.1(65)$349.99
DisplaysShellyWall Display
4.4(435)€130.72
Door & Window SensorsShellyBLU Door/Window Outdoor ZB
Door & Window SensorsShellyBLU Door/Window ZB
4.6(42)$22.99
Energy MonitorsShelly3EM-63W Gen3
4.5(152)$114.99
Energy MonitorsShellyEM Gen3
4.6(269)$69.99
Energy MonitorsShellyEM Gen4
Unavailable
Energy MonitorsShellyEM Mini Gen4
4.5(139)$24.99
Energy MonitorsShellyPro 3EM 3CT63
4.4(351)$150.99
Energy MonitorsShellyPro 3EM-400
4.3(21)$329.99
Energy MonitorsShellyPro 3EM v2
4.5(84)$154.99
Energy MonitorsShellyPro EM-50
4.6(956)$119.99
Gas DetectorsShellyGAS (CNG)
4.2(45)€64.21
Gas DetectorsShellyGAS (LPG)
LED BulbsShellyMulticolor Bulb E27 Gen3
4.2(35)€9.90
Motion SensorsShellyBLU Motion ZB
4.4(50)$26.99
Air Quality MonitorsSonoffSAWF-07P Air Quality Monitor
3.8(196)$39.90
Air Quality MonitorsSonoffSAWF-08P Air Quality Monitor
4.3(174)$49.90
ButtonsSonoffRM433R2 Remote Controller
€16.95
ButtonsSonoffSNZB-01P Zigbee Wireless Switch
4.2(966)$16.90
CamerasSonoffCAM GlassView
4.0(51)$34.90
CamerasSonoffCam Outdoor DUO
4.0(3)$79.90
CamerasSonoffCam Slim Gen2
4.4(181)$19.90
CamerasSonoffGK-200MP2-B
4.0(149)Unavailable
DisplaysSonoffNSPanel Pro Gen2
3.2(11)€149.90
DisplaysSonoffNSPanel Pro
4.1(77)$129.90
DonglesSonoffDongle Lite MG21
4.5(462)$24.90
DonglesSonoffDongle Max
4.3(632)$42.90
DonglesSonoffDongle Plus MG24
4.7(702)$35.90
DonglesSonoffDongle Plus PP10
4.5(102)$35.90
DonglesSonoffDongle-PZG23
4.5(176)$39.90
DonglesSonoffZ-Wave 800 PoE Dongle Max
4.5(28)$44.90
DonglesSonoffZBDongle-E
4.7(3,752)$24.90
DonglesSonoffZBDongle-P
4.6(5,695)16% OFF$39.99$33.52
Door & Window SensorsSonoffDW2-WIFI
3.6(153)$12.90
Door & Window SensorsSonoffSNZB-04 ZigBee Wireless Door/Window Sensor
3.7(101)Unavailable