Qolsys q9-qs1137840 Wireless Door Window Sensor 319.5 Mhz

Product Description

The QOLSYS q9-qs1137840 is a compact wireless door and window sensor designed for residential and light commercial security system installations. Operating at 319.5 MHz with S-Line encryption, this sensor provides secure, encrypted wireless communication between the contact point and the control panel. The terminal block connection allows for integration with hardwired accessories or external contacts, giving installers flexibility in mixed wiring environments. Security system technicians and alarm installers are the primary trades that deploy this sensor during new construction rough-ins or retrofit projects.

This sensor is suited for installation on doors, windows, and other entry points where open and closed status must be monitored. Its compact form factor makes it well-suited for residential homes, apartments, and small commercial spaces where discreet sensor placement is a priority. The S-Line encryption protocol adds a layer of RF security, helping to prevent signal interception or jamming on the 319.5 MHz frequency band. The included terminal block expands wiring options beyond standard magnetic contact configurations.

Key Features

• 319.5 MHz wireless frequency for reliable signal transmission
• S-Line encryption for secured, tamper-resistant RF communication
• Compact form factor for discreet door and window mounting
• Terminal block connection supports integration with external hardwired contacts
• Designed for residential and light commercial security applications

Compatibility

Designed as an OEM-style replacement or expansion sensor compatible with security control panels that support the 319.5 MHz S-Line encrypted wireless protocol.

Installation Notes

Installation should be performed by a licensed security or low-voltage alarm technician in accordance with local codes and the control panel manufacturer guidelines. Power down or disarm the security system before enrolling or mounting any wireless sensor. The terminal block connections should be made using appropriate gauge wire and a small flat-blade screwdriver. Verify sensor enrollment and zone reporting at the panel before completing installation.

Technical Specifications

• Wireless Frequency: 319.5 MHz
• Encryption Protocol: S-Line
• Connection Type: Terminal Block
• Sensor Type: Door and Window Contact

Standard Information

• Brand: QOLSYS
• Manufacturer Part Number: q9-qs1137840