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. Includes the Locksure open/close magnet so the same Matter device reports both lock state and door open/close. No cylinder swap, no Locksure Hub required.
In the box
- Matter Thumb Turn sensor
- Locksure open/close magnet (for door frame)
- CR2032 battery (pre-installed)
- Bamboo settings tool
- Matter pairing QR code, adhesive pads & quick-start guide
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
⊓
Open/Close Magnet Inc.
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. The included Locksure open/close magnet adds door open/close detection on the same Matter device, so one tile shows both lock state and door position. No cylinder swap, no drilling, no extra hub if you already have a Matter controller.
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
- Includes Locksure open/close magnet — adds door open/close detection to the same Matter device, no second accessory needed
- 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)
- ~2 year 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. The included Locksure open/close magnet mounts on the door frame with the supplied adhesive pad, no wiring. 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 80–95% 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 |
