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
Use official 2GIG PDFs and install guides for exact wiring, enrollment, and firmware — specifications vary by SKU and region.
Installation Notes
Follow 2GIG contact sensor install guide and the official resource links in this product folder for mounting, wiring, and enrollment.
Pre-install checklist
- Confirm panel model (GC2/GC3/Edge) and encryption requirements.
- Verify dealer cell account and module SKU before cell install.
- Document installer code and existing zone map for takeover jobs.
- Plan antenna routing (ANT5XL) when panel location has poor cell RSSI.
- Have listed batteries and tools for sensor mounts before enrollment.
Typical install sequence
- Mount and power panel; apply firmware updates per dealer bulletin.
- Install cell module and run communication test / Alarm.com activation.
- Enroll wireless sensors via installer Learn mode; label zones.
- Include Z-Wave devices after excluding from any prior hub.
- Install transceiver/repeater hardware before distant ePlus or fringe sensors.
- Run walk test, user code training, and central station test if monitored.
Contact alignment
- Gap between sensor and magnet must be within spec — too wide reads open.
- Use spacers on uneven trim; verify tamper clears when cover closed.
- For encrypted DW10e/DW20e, enroll on panel with encryption support enabled.
Power and connectivity reference
| Product type | Power | Network / RF |
|---|---|---|
| GC2/GC3/Edge panel | AC + backup battery | 345 MHz receiver; Z-Wave; optional LTE |
| Wireless sensor | Battery per SKU | 345 MHz; ePlus 900 MHz with XCVR2 |
| Cell module | Panel-powered | LTE to dealer / Alarm.com |
| GC Touch keypad | AC + battery backup | Wireless to panel |
| Z-Wave module | Mains or battery per device | Z-Wave to panel |
Source: 2GIG contact sensor install guide (2GIG official documentation).