Overview
ADT door/window contact sensor — magnetic reed switch for openings on Command SiX or Self-Setup wireless systems.
On ADT systems, this device is a supervised wireless peripheral (SiX on Command, Self-Setup RF on DIY hub, or Z-Wave for automation SKUs) — status appears in the ADT+ or ADT Control app, and faults can block arming depending on mode settings.
At a Glance
| Specification | Details |
|---|---|
| Detection | Open/close (magnetic gap) |
| Wireless | SiX (Command) or Self-Setup RF — verify platform |
| Supervision | Panel/app sensor list — low battery, tamper, missing |
| Power | Battery per install guide |
What This Device Does Well
Provides reliable status reporting and user-facing alerts through the ADT+ or ADT Control app when installed and enrolled correctly.
Before You Service or Replace One
- Platform — Command SiX vs Self-Setup sensor family — battery type and reset steps differ.
- Hub/panel online — must show connected in app before diagnosing sensor.
- Range — distant devices may need Range Extender, not a new sensor.
- Tamper — cover fully closed before declaring hardware fault.
- Monitoring mode — Practice/disarmed modes affect whether alarms dispatch.
Official Sources
Use official ADT help.adt.com support articles for reset procedures, battery types, LED patterns, and regional availability — ADT updates app flows frequently.
Compatible Peripherals
This page lists what this product works with in the ADT ecosystem — not generic third-party alarm panels unless explicitly stated in ADT help.adt.com support.
Host compatibility
| Host / ecosystem | How it connects |
|---|---|
| ADT Command panel | SiX contact enrollment |
| ADT Smart Home Hub / Base | Self-setup contact enrollment |
Not compatible / common mistakes
Using ADT Z-Wave automation devices without a compatible Command panel or Self-Setup hub.
Replacement guidance
- Match generation and SKU on the product label before ordering.
- After replacement, remove old device from app and add new hardware — Z-Wave IDs do not transfer.
- Document device name and placement in app for end-user support.
- For monitored accounts, run test mode per ADT monitoring plan instructions after swap.
Source: ADT door/window sensor installation guide (ADT official documentation).