BLU H&T ZB
A 37 mm temperature and humidity sensor for a shelf or bench. It reports over Bluetooth to a Shelly nearby, or over Zigbee to your hub, for up to three years on a coin battery.
$29.95 inc GST In stock at supplier · dispatches in 5 business days
Currently sold out.
Free shipping over $150 Ordered in from our supplier. Allow about 5 business days before it dispatches.
30-day returns Unused items, easy online returns
3-year warranty Backed by Shelly
Everything you need to know
The sections below cover what it can switch, how it reports to your network, the full specifications, and how warranty and returns work. The questions at the bottom cover the common ones.
Product features
Runs the fan when the humidity climbs
Use its readings to switch a bathroom exhaust fan, a dehumidifier or a heater through a Shelly relay, or to warn you when a room gets too cold or too damp.
- Reports temperature and relative humidity
- Press the button for a fresh reading
Bluetooth or Zigbee
Over Bluetooth it reports to any Plus, Pro, Gen3 or Gen4 Shelly in range, which acts as its gateway. Zigbee is built in as well, so it can join a Zigbee hub you already have.
- Up to 10 m indoors, 30 m outdoors
- Encrypted
Three years on one coin cell
It runs on the included CR2032 battery, which Shelly rates at three years. It's splash and dust resistant, so it suits a bathroom or laundry.
- 37 × 37 × 10 mm, 13 g
- Works from -20 to 60 °C
How Shelly BLU works
Shelly BLU devices are battery sensors and buttons that talk Bluetooth, not Wi-Fi. They don't join your network themselves. A Shelly on your Wi-Fi picks up what they send and passes it on to the Shelly app, your automations or Home Assistant, and that Shelly is called the gateway.
The device
Made to run on a battery
Bluetooth needs very little power, so a BLU device runs for years on a coin cell and goes where there's no power point: on a door, a shelf or a fence post. The battery life for each one is on its product page.
The gateway
Every BLU device needs a gateway
The gateway is any Shelly on your Wi-Fi within range. Plus, Gen3, Gen4 and Pro relays and dimmers all do the job, so if you already have one nearby, you're set. If you don't, the BLU Gateway plugs into a USB charger and does only this job.
The range
Plan on about 10 metres indoors
Shelly rates the link at about 10 metres indoors and 30 metres outdoors. Walls, metal and appliances cut that down, so Shelly recommends a gateway in every room, and a device can report to more than one.
The platforms
Home Assistant reads them through BTHome
BLU devices have no Matter radio, so Apple Home, Google Home and Alexa only see them through whatever your gateway is connected to. Home Assistant supports the range directly through its BTHome integration.
Getting started
1
Check for a gateway first Start here
If a Plus, Gen3, Gen4 or Pro Shelly is in the same room or the next one, you don't need anything else. If not, add a BLU Gateway or a mains Shelly near where the device will go.
2
Add it in the Shelly app Then pair it
In Shelly Smart Control, tap the plus sign and choose Add via Bluetooth, press the device's button when asked, then tick the Shelly that will be its gateway.
Models marked ZB also carry Zigbee, so they can join a Zigbee coordinator instead of reporting through a Shelly.
What's in the box
- 1× Shelly BLU H&T ZB
- 1× CR2032 battery
Works with
Also works with
-
Pairs with Home Assistant
Connects over
Phone to device, through a hub
Your phone reaches the hub over your home network; the hub speaks Zigbee to the device, and adds scenes, automations and out-of-home control.
-
Zigbee
or
Phone to device, through a gateway
Your phone reaches the gateway over your home network; the gateway speaks Bluetooth to the device, and adds scenes, automations and out-of-home control. Any of Shelly's mains-powered devices can act as the gateway.
-
Bluetooth
Works offline
Keeps working on your home network when the internet is down.
Specifications
No specifications match.
Power
- Power
- Battery
- Battery
- CR2032
- Battery life
- 36 months
- Mounting
- Free-standing
- Housing material
- Plastic
- Reports temperature
- Yes
- Version
- 5 (LE)
- Range (indoors)
- 10 metres
- Extends the network
- No
- Range (indoors)
- 10 metres
- Operating temperature
- -20–60 °C
- Operating humidity
- 0–100 % RH
- SKU
- SHE-SNS-0013
- Barcode
- 3800238072438
What you can do with it
A warm towel rail on winter mornings
Schedule the rail for weekday mornings and it's warm when you step out of the shower, off again before you leave. No more discovering it's been heating an empty house all day. Control with any of
Bathroom fan that clears the steam, then turns itself off
The exhaust fan keeps running after the light goes off, long enough to clear the steam, then shuts itself down. Add a humidity sensor and it only runs when the room needs it. Control with any of Common questions
Quick answers before you buy. We test this gear ourselves. Can't find yours? Ask our Melbourne team
Over Bluetooth, yes: a Plus, Pro, Gen3 or Gen4 Shelly in range acts as its gateway. Over Zigbee, a Zigbee hub does the job instead.
No. Readings show in the Shelly app, or wherever your gateway sends them. The BLU H&T Display ZB is the version with a screen.
It's splash and dust resistant, but Shelly doesn't publish an IP rating, so keep it under cover.
Press the button five times quickly. The LED flashes twice every 2 seconds while it's in Zigbee pairing mode, for up to a minute.
Yes. Over Bluetooth, Home Assistant's BTHome integration picks it up.
Hold the button for 30 seconds straight after putting the battery in.
Shelly · BLU H&T ZB