Thumb Turn Monitor (Matter)
The Matter Thumb Turn sensor sits over your existing thumb-turn lock and reports real lock state to the Matter controller you already use: Apple Home, Google Home, Amazon Alexa, SmartThings or Home Assistant. No cylinder swap, no Locksure Hub required. Want door open/close on the same Matter tile? Add the optional Open/Close Magnet accessory for £9.99.
In the box
- Matter Thumb Turn sensor
- CR2032 battery (pre-installed)
- Bamboo settings tool
- Matter pairing QR code, adhesive pads & quick-start guide
Optional accessory · Open/Close Magnet · £9.99, mounts to your door frame and lets the same Matter device report door open/close alongside lock state. Buy it on the Locksure store any time, no setup beyond sticking it on.
Needs a Matter controller (Apple Home, Google Home, Alexa, SmartThings or HA) and a Thread border router. Apple Home shows “Uncertified Accessory” on first pair while CSA cert finishes, tap Add Anyway and you’re in.
✓
Matter Native
⇄
Single Device, Both Sides
13m
CR2032 Battery
5m
5-Min Install
MATTER OVER THREAD
The Locksure Matter Thumb Turn sensor sits over your existing thumb-turn lock and reports real lock state to your Matter setup, Apple Home, Google Home, Amazon Alexa, SmartThings or Home Assistant. No cylinder swap, no drilling, no extra hub if you already have a Matter controller. Want door open/close on the same Matter tile? Add the optional Locksure Open/Close Magnet accessory at £9.99, mounts to your door frame with adhesive, no setup required.
Matter Thumb Turn Sensor, Technical Specifications
- Fits over the profile of an exposed barrel (must be at least 1mm exposed)
- Single device monitors locking and unlocking from both sides of the door
- Open/Close Magnet sold separately (£9.99), adds door open/close detection to the same Matter device as a second endpoint (Contact Sensor)
- Matter native, pairs with Apple Home, Google Home, Amazon Alexa, SmartThings and Home Assistant
- No extra hub needed if you already have a Matter controller
- Thread mesh, extends through walls via any Thread border router (HomePod, Apple TV, Nest Hub, Echo 4th gen, SmartThings, Eero 6+, SkyConnect)
- ~13 months battery life on a CR2032 coin cell at the lowest TX power setting (Thread sleepy end-device, ICD)
- Signed OTA firmware updates over Thread, straight from the app
Pairing & Compatibility
You need a Matter controller and at least one Thread border router on your network. Common border routers include HomePod mini / Apple TV 4K, Google Nest Hub (2nd gen), Amazon Echo (4th gen), SmartThings Hub v3+, Amazon Eero 6+, and the HA SkyConnect dongle. CSA Matter certification is mid-flight, until it lands, Apple Home will show “Uncertified Accessory” on first pair; tap Add Anyway and the device works normally. Certified firmware ships as a free OTA when cert clears.
Heads-up on battery reading: the in-app battery percentage currently under-reads slightly at the high end of cell life, a brand-new CR2032 may show 80 to 95% rather than 100%. This is cosmetic and addressed in a future free OTA.
Customer Reviews
“The visual flash of the LEDs alone when I lock the door really stick in my memory. Locksure has been on my door for over six months now and I want to keep it!”
, Jason, Stevenage ★★★★★
“We have a three story house and, just before bed, I get paranoid if I remembered to lock the door. No more with Locksure, I just check the app and have peace of mind.”
, Belinda, Slough ★★★★★
| Weight | .15 kg |
|---|---|
| Dimensions | 140 × 100 × 50 cm |
