Dsc BV-L4 Pir Replacement Lens Pet Alley

Product Description

The DSC BV-L4 is a pet-alley replacement lens designed for passive infrared (PIR) motion detectors. It modifies the detection pattern of a compatible PIR sensor to reduce false triggers caused by small animals, allowing pets to move through a protected area without activating the alarm. This lens is a direct swap for the original optic on supported detector housings and is typically installed by alarm installation technicians during system setup or as a field retrofit when a customer introduces pets to a protected space.

The BV-L4 is suited for residential and light commercial security installations where standard PIR detection coverage needs to be replaced with a pet-immune detection pattern. It is used in interior spaces where animals under a typical weight threshold must be permitted to move freely without generating alarm events. Installation is straightforward and requires no additional wiring or programming changes to the control panel.

Key Features

• Pet-alley lens pattern reduces false alarms caused by small animals
• Designed as a field-replaceable optic for compatible PIR detectors
• No wiring changes required — lens swap only
• Sold individually as a single replacement unit

Compatibility

Designed as an OEM-style replacement lens for compatible DSC PIR motion detector housings that accept interchangeable lens optics. Refer to the detector's installation documentation to confirm lens compatibility before ordering.

Installation Notes

Installation is performed by a licensed alarm technician. Before servicing the detector, disarm the security system and, where required, notify the monitoring station to prevent a false dispatch. Remove power or place the zone in test mode before opening the detector housing. Follow the detector manufacturer's installation guide for proper lens seating to ensure the detection pattern performs as specified.