Dsc BV-L3 Pir Curtain Lens Security Sensor

Product Description

The DSC BV-L3 is a replacement curtain lens designed for passive infrared (PIR) motion detectors used in security alarm systems. The curtain lens reshapes the detection pattern of the sensor, narrowing the field of view into a thin vertical plane rather than a wide coverage zone. This makes it well-suited for protecting specific openings such as doorways or windows without triggering on broader room activity. Licensed alarm installation technicians and low-voltage security contractors are the primary installers of this component.

The BV-L3 curtain lens is intended for use with compatible DSC PIR motion detector housings where the standard wide-angle lens is swapped out for a curtain-style pattern. Curtain lens configurations are commonly specified in residential and light commercial intrusion detection systems when the installation requires targeted zone coverage. This lens ships as a single unit and installs directly into the sensor housing without additional hardware in most applications.

Key Features

• Curtain detection pattern narrows PIR coverage to a focused vertical zone
• Designed as a direct replacement lens for compatible DSC PIR detectors
• Allows targeted protection of doorways, windows, or other defined openings
• Single-unit packaging simplifies replacement inventory management

Compatibility

Designed as an OEM-style replacement curtain lens for compatible DSC PIR motion detector housings. Verify detector model compatibility before installation.

Installation Notes

Installation should be performed by a licensed low-voltage security or alarm technician in accordance with local codes. Disconnect power and disarm the security system before opening the detector housing or handling the lens. Handle the lens carefully to avoid contamination of the optical surface, which can degrade detection performance. Re-test detector coverage pattern after lens replacement to confirm proper zone definition.