BLU Door/Window ZB
A coin-cell door and window sensor that reports open, closed and tilt angle over Bluetooth, through a mains-powered Shelly. Zigbee 3.0 on board as well.
$35.95 Was $39.95 inc GST In stock · ships today
Currently sold out.
Free shipping over $150 Order before 3pm Melbourne time on a weekday and it ships the same day.
30-day returns Unused items, easy online returns
3-year warranty Backed by Shelly
Everything you need to know
The sections below cover how the sensor reaches your setup, the jobs people put it on, the full specifications, and how warranty and returns work. If something's still unanswered, the questions at the bottom cover the common ones.
Product features
One mains Shelly does the talking
The sensor is a battery device that broadcasts over Bluetooth and nothing more. A mains-powered Shelly nearby picks that up and passes it on to your network, your app, or your home automation system. If you already have one behind a switch or in the switchboard, it is doing this job whether you knew it or not. Any of the Plus, Gen3, Gen4 and Pro devices will act as the gateway, so there is no separate bridge to buy for the BLU range.
- Works with the Plus, Gen3, Gen4 and Pro ranges
- Around 10 m indoors between sensor and gateway
- No separate bridge to buy
Open, closed, or just tilted
The reed switch tells you the moment the two parts separate. A second sensor reads the angle, so a tilt-and-turn window reports as vented rather than simply open, and you can tell a window cracked for air from one left wide. While it is open the sensor checks the angle every eight seconds and sends an update whenever it moves. The light level goes out with every report as well.
- Reed switch for open and closed
- Tilt angle for tilt-and-turn windows
- Light level sent with every update
About five years on one coin cell
The sensor sleeps until something happens, then sends a short broadcast and goes quiet again. That is what gets it to roughly five years on a single coin cell, and the first one is in the box. Beacon mode sends an update every 30 seconds whether anything has changed or not, which will shorten that considerably. Leave it off unless you have a reason to want it.
- Coin cell included
- Around five years in normal use
- Beacon mode trades battery life for constant updates
Zigbee 3.0 on board as well
Alongside Bluetooth the sensor carries a Zigbee 3.0 radio, and it can run both at once. Most people here will use the Bluetooth path through a Shelly gateway, which is the setup we sell for. If you already run a Zigbee coordinator, Home Assistant with a Zigbee dongle for instance, you can pair it there instead and skip the gateway. Five quick presses of the button puts it into Zigbee pairing mode.
- Zigbee 3.0 and Bluetooth 5 LE together
- Pairs to an existing Zigbee coordinator
- BTHome supported for Bluetooth automations
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 Door/Window ZB sensor
- 1× Magnet
- 1× CR2032 battery
- Fitted, around five years of life
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
- 60 months
- Placement
- Indoor
- Housing material
- Plastic
- Built-in light sensor
- Yes
- Version
- 5 (LE)
- Range (indoors)
- 10 metres
- Extends the network
- No
- Range (indoors)
- 10 metres
- Operating temperature
- -20–40 °C
- Operating humidity
- 30–70 % RH
- SKU
- SHE-SNS-0008
- MPN
- SBDW-103C
What you can do with it
Get told when a door or window is left open
A sensor on the door or window and a rule that waits. If it is still open after five minutes, your phone gets told, and a nearby light can come on as well. Control with any of
Lights and heating that come on when you get home
Tap Leaving home as you go out. The next time the front door opens after dark, the entry light comes on, and the heater too if you want it. Control with any of 
Open the garage door or gate from your phone
Wire the relay across the opener's button terminals and the roller door, swing gate or door release answers your phone as well as the wall button. Pair it with a contact sensor and you'll also know whether the door is actually shut. Control with any of Get warned about an open window before rain arrives
The tilt reading tells you a window is cracked for air rather than shut. Tie it to the forecast and you get the nudge before the weather arrives, not after. Control with Common questions
Quick answers before you buy. We test this gear ourselves. Can't find yours? Ask our Melbourne team
A mains-powered Shelly Plus, Gen3, Gen4 or Pro within Bluetooth range, acting as the gateway. Any one of them will do it, including a 1 Mini Gen4 already sitting behind a light switch.
No, and Bluetooth is the path most people here will take. It does speak Zigbee 3.0, and it can run both radios at once, so if you already have a Zigbee coordinator, Home Assistant with a Zigbee dongle for instance, you can pair it there and skip the Shelly gateway. We don't currently sell a coordinator that will adopt it. The Hue Bridge takes Hue's own range and its certified partners, not a generic Zigbee 3.0 sensor.
It reports the angle of the door or window, not just open or shut. On a tilt-and-turn window that tells you whether it's fully open or only vented. While it's open the sensor checks the angle every eight seconds and sends an update when it moves.
A single CR2032, included, good for around five years.
No. It has no ingress rating and is made for indoors.
Shelly · BLU Door/Window ZB
