Overview
Ring contact sensor — magnetic reed switch for doors, windows, and similar openings on Ring Alarm Z-Wave systems.
On Ring Alarm, this device is a supervised Z-Wave peripheral — status appears under Device Health in the Ring app, and faults can block arming depending on mode settings.
At a Glance
| Specification | Details |
|---|---|
| Detection | Open/close (magnetic gap) |
| Wireless | Z-Wave to Base Station / Range Extender |
| Power | CR123A or listed battery (varies by generation) |
| Supervision | Ring app Device Health — Offline, Tampered, Low Battery |
| Install | Align magnet ≤ gap spec; tamper on back cover |
What This Device Does Well
Provides reliable status reporting and user-facing alerts through the Ring app when installed and enrolled correctly.
Before You Service or Replace One
- Generation — Gen 1 vs Gen 2 vs 3rd gen — battery type and reset steps differ.
- Hub online — Base Station 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
- https://ring.com/support/products/alarm/contact-sensor-gen-1?page=1
Use official Ring support articles for reset procedures, battery types, LED patterns, and regional availability — Ring updates app flows frequently.
Error Codes
Ring products report faults through the Ring app Device Health and device event history — not traditional numeric keypad codes like hardwired alarm panels.
How to read status
- Open Ring app → Menu → Alarm (or device tile for cameras).
- Tap Device Health or the device — note Offline, Tampered, Low Battery, Open.
- Tap the fault for Ring's suggested steps and linked support articles.
- For hub issues, check Base Station / Alarm Pro connectivity first — many "sensor offline" faults are mesh or hub internet issues.
Common status / trouble indicators
| App status / symptom | Meaning | First checks |
|---|---|---|
| Offline | Device lost Z-Wave path to hub | Battery, Range Extender, hub online |
| Tampered | Cover or mount tamper open | Reseat cover; bracket screws |
| Low Battery | Battery below threshold | Replace with official battery type |
| Failed to add device | Enrollment issue | Remove failed device; factory reset; re-add near hub |
| Open (contacts) | Magnet gap too wide | Realign; check door warp |
App actions (typical)
| Action | Where in Ring app |
|---|---|
| View Device Health | Alarm → Base Station → Device Health |
| Remove and re-add device | Device settings → Remove → Set up new device |
| Arm/disarm test | Alarm modes on home screen |
| Contact support | Help → Contact Ring |
Source: Ring contact sensor installation and positioning guides; Ring official support articles linked in this product folder manifest.
| Code | Meaning | Suggested Fix |
|---|---|---|
| Offline | Device lost Z-Wave path to hub | Battery, Range Extender, hub online |
| Tampered | Cover or mount tamper open | Reseat cover; bracket screws |
| Low Battery | Battery below threshold | Replace with official battery type |
| Failed to add device | Enrollment issue | Remove failed device; factory reset; re-add near hub |
| Open (contacts) | Magnet gap too wide | Realign; check door warp |
| Action | Where in Ring app | |
| View Device Health | Alarm → Base Station → Device Health | |
| Remove and re-add device | Device settings → Remove → Set up new device | |
| Arm/disarm test | Alarm modes on home screen | |
| Contact support | Help → Contact Ring |