Overview
2GIG door/window contact — magnetic reed sensor reporting open/close on 345 MHz (standard or eSeries encrypted thin/recessed/outdoor variants).
On 2GIG systems, wireless devices are supervised zones on the panel — tamper, low battery, and missing signals appear as trouble conditions that may block arming depending on panel programming.
At a Glance
| Specification | Details |
|---|---|
| Detection | Open/close via magnet gap |
| Wireless | 345 MHz to panel receiver |
| Encrypted | DW10e, DW20e, outdoor encrypted SKUs on e panels |
| Power | CR123A or listed battery — verify SKU |
| Supervision | Panel zone trouble — low battery, tamper, offline |
What This Device Does Well
Provides reliable supervised status at the panel and Alarm.com when installed, enrolled, and range-tested correctly.
Before You Service or Replace One
- Sensor SKU — standard 345 MHz vs eSeries encrypted vs ePlus 900 MHz.
- Panel online — resolve panel AC/cell trouble before blaming sensor.
- Range — repeaters (RPTR1) or transceivers (XCVR2) for distant zones.
- Battery type — use listed cell; replace all batteries in multi-cell devices.
- Tamper — cover fully closed before declaring hardware fault.
Official Sources
- 2GIG product page
- 2GIG Full Catalog English
- 10023748a x3 installandprogrammingguide
- 2GIG Edge Smart Home Manual 1
- 2GIG Edge User Guide 1
- 2GIG GC2 User Guide
- 2GIG GC2 User Guide FR
- 2GIG GC2 User Guide PO
- 2GIG GC2 User Guide SP
- 2GIG GC2 User Guide TU
Use official 2GIG PDFs and install guides for exact wiring, enrollment, and firmware — specifications vary by SKU and region.
Compatible Peripherals
This page lists 2GIG ecosystem compatibility — panels, transceivers, repeaters, and monitoring platforms — not third-party panel brands unless using an approved takeover path.
Host compatibility
| Host / ecosystem | How it connects |
|---|---|
| GC2 / GC3 / Edge | 345 MHz sensor enrollment |
| GC2e / GC3e / Edge | eSeries encrypted enrollment |
| 345S thin/recessed series | 345S naming — same ecosystem |
Not compatible / common mistakes
- Encrypted contact on non-e panel without encryption support
- Magnet gap wider than spec — chronic open trouble
Replacement guidance
- Match SKU and encryption generation on product label before ordering.
- Delete old zone/device in installer programming before enrolling replacement.
- Document zone number and name for user and central station records.
- Run walk test and communication test after swap on monitored accounts.
Source: 2GIG contact sensor install guide (2GIG official documentation).