Smart Shield Systems
IQ Door/Window-S
Keep tabs on any door or window with a dependable, encrypted contact. The IQ Door/Window-S uses S-Line secure 319.5 MHz signaling to your IQ Panel and delivers fast, accurate open/close alerts—plus customizable chimes, notifications, and automations. Slim profile, long battery life, and professional installation from Smart Shield Systems make it a go-to for perimeter protection.

Why Choose This with Smart Shield Systems
- Pro placement & neat install so magnets align and false alarms stay low
- Secure S-Line encryption with support for legacy 319.5 MHz systems
- Automations & alerts (e.g., “text me if a window is left open”) set up for you
- Local support for naming, chimes, battery swaps, and troubleshooting
Key Features
- Reliable open/close detection with a recessed reed switch and included magnet. Max magnet gap ¼″ (see material table in manual).
- Encrypted S-Line radio to your IQ Panel; also works (unencrypted) with many 319.5 MHz receivers.
- Long wireless reach—rated up to ~600 ft (open air) to the panel.
- Supervised health checks with trouble, tamper, and low-battery reporting.
- Smart rules (Safety Sensor option for cabinets/safes; “left-open” texts via Alarm.com).
Product Specifications (At-a-Glance)
- Model / Part #: QS1133-840 (IQ Door/Window-S)
- Dimensions (sensor): 2.65″ H × 0.85″ W × 0.75″ D; indoor, non-hazardous locations.
- Radio / Protocol: 319.5 MHz S-Line; supervisory keep-alive ~70 min.
- Open-air range: up to ~600 ft (site-dependent).
- Power: 1× CR2 3 V lithium; replace with exact type ~every 5 years (panel supervises low battery).
- Operating environment: 0–49 °C (32–120 °F); RH ≤ 85% (non-condensing).
- Magnet gap guidance: ≤ ¼″; material-dependent separation table provided in the manual.
Compatibility Notes
- Works natively with IQ Panel 2/2+/4 family using S-Line; also enrolls with many 319.5 MHz systems (unencrypted). We’ll confirm your exact panel/firmware.
- Can be programmed as a standard Door/Window zone or as a Safety Sensor for cabinets, chemicals, or safes, then tied to Alarm.com notifications/automations.
Popular Use Cases
- Main entry, back, and side doors
- Double-hung and casement windows
- Interior doors, closets, and drawers you want monitored (as “Safety” zones)
Frequently Asked Questions
Mount the sensor on the fixed frame (door jamb or window frame) and the magnet on the moving portion. Keep the magnet within ¼″ of the marked sensor side; we’ll verify alignment during install.
In open air it’s rated up to ~600 ft. Building materials can reduce range, so we test signal strength on site.
It uses one CR2 3 V lithium cell. The documentation recommends replacing it with the exact type about every 5 years; your panel will alert for low battery.
Yes. With Alarm.com we can enable left-open texts/push alerts and link the sensor to scenes (e.g., adjust thermostat if a window is left open).
It’s optimized for IQ Panels using S-Line encryption, but it can also enroll (unencrypted) with many 319.5 MHz legacy panels. We’ll confirm compatibility during your quote.
Additional Resources
Download ManualReady for Rock-Solid Perimeter Protection?
Smart Shield Systems will place, enroll, and test your IQ Door/Window-S (QS1133-840), name zones, set chimes and alerts, and tie it into your automations—so you always know what’s open, closed, or left ajar.