Shelly BLU H&T Display ZB White — Temp & Humidity Sensor

Product detailed description

Zigbee temperature and humidity sensor with an e-paper display 🌡️

Shelly BLU H&T Display ZB in white is a battery-powered temperature and humidity sensor that not only sends readings to your smart home system, but shows them right on a crisp e-paper display. Alongside temperature and humidity it also tracks the light level in the room and has a built-in digital clock with date.

At just 9 mm thick it is one of the slimmest display sensors around – it doesn't look like extra hardware, more like a small accessory on a shelf or wall. Thanks to Zigbee 3.0 and Bluetooth 5.0 support you choose which ecosystem to plug it into, and the CR2032 batteries inside last about two years.

Everything about your room climate at a glance

With an ordinary Zigbee temperature sensor you first have to find it in an app to see how warm the room is. This indoor thermometer and hygrometer answers you faster than you can pull out your phone – the display shows the time, temperature and relative humidity at once, plus the battery level and icons for the active connection.

The display is e-paper, so it doesn't glow and won't disturb you at night. It reads like paper – sharp and from an angle – and only uses power when a value actually changes. Four quick presses of the button switch to inverted display, so you can pick between dark text on a light background and light text on a dark one. The same button switches °C to °F, the 24-hour format to 12-hour, or the clock to the date.

The third sensor inside the device is a light sensor that distinguishes three levels – bright, twilight and dark. You see them as bars next to the connection icons, and in automations they work as a trigger: when the living room dims, you can switch on a lamp without adding another detector to the room. In complete darkness the sensor enters power-save mode, stops refreshing the display and saves battery – while still reporting data wirelessly.

The sensor comes in two colour finishes – the white version on this page, and a black one. Dimensions, features and the contents of the box are identical; only the colour of the plastic differs.

Dual wireless support is this model's strongest argument. Over Zigbee 3.0 you connect it to any Zigbee gateway – Home Assistant with ZHA or Zigbee2MQTT, Samsung SmartThings or another hub – and it becomes part of a mesh network that is resilient and doesn't load your Wi-Fi. Over Bluetooth 5.0 LE you pair it with the Shelly Smart Control app, as long as you already own any Shelly Plus, Pro, Gen3 or Gen4 device acting as a BLE gateway. You will find more devices that can do that job in the Shelly Bluetooth category.

Placement is completely up to you. The box contains a tabletop stand, the back has built-in magnets (they grip a fridge or a switchboard directly) and a metal plate with adhesive for the wall is included too – so installation needs no drilling and no work on your wiring. The display comes with a protective film applied at the factory. You will find the brand's full range in the Shelly Smart Home section.

Who the sensor is for

• For parents who want to be sure the nursery is at the right temperature and humidity – and to see it without a phone.
• For Home Assistant and Zigbee2MQTT users looking for an affordable, reliable Zigbee sensor with local control.
• For owners of Shelly devices who already have a BLE gateway at home and want to add the sensor to existing scenes.
• For renters – mounting on a magnet or adhesive plate leaves not a single hole in the flat.
• For anyone dealing with mould and damp in a bedroom, cellar or wardrobe who needs a long-term view of the numbers.

Use cases

• Checking the temperature in a nursery – set an alert for when the temperature drops below 19 °C or humidity falls under 40 %.
• Automatic heating based on the real room temperature – pair the sensor with a thermostatic valve or a Shelly relay and heat only when it's needed.
• Mould protection in a cellar or wardrobe – when humidity goes over your threshold, start a fan or a dehumidifier.
• Switching on a light at dusk – the light sensor works as a twilight switch without any extra device.
• Monitoring a server room or workshop – data is collected continuously, so you can look back and see when the temperature spiked.
• A desk clock with a thermometer 🕔 – time, temperature and humidity in one place, with no glowing display.

Key features and protocols

Why choose the Shelly BLU H&T Display ZB

• You see the values instantly – no phone, no app, no waiting for data to refresh.
• Zigbee and Bluetooth in one – you aren't tied to a single ecosystem and can change protocol later.
• 9 mm thick – the slimmest display sensor of its kind, almost invisible on a wall.
• Three sensors in one device – temperature, humidity and light, which otherwise needs a separate twilight switch.
• Two years without worry – e-paper and power-save mode in the dark keep consumption to a minimum.

Compared with the Shelly BLU H&T ZB without a display you gain an e-paper screen with a clock and a light sensor. The smaller model has IP54 protection and longer battery life instead, so if you only need the sensor as a data source for automations and don't need to read it with your eyes, it will cost you less.

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