Optex SL-650QN Outdoor Quad Beam Detector

Product Description

The OPTEX SL-650QN is an outdoor quad beam photoelectric detector designed for perimeter security and access control applications. The unit projects four stacked infrared beams between a transmitter and receiver, requiring simultaneous interruption of multiple beams to trigger an alarm event. This multi-beam design significantly reduces false alarms caused by small animals, blowing debris, or single-point obstructions. The SL-650QN is intended for exterior installation along fence lines, driveway entries, building perimeters, and similar outdoor detection zones. Security integrators and low-voltage alarm technicians are the primary installers for this type of equipment.

The SL-650QN is suited for commercial and residential perimeter security systems where reliable outdoor detection is required. Typical installations include protected entry points, property boundaries, and open-area detection corridors. The quad beam configuration makes it appropriate for sites where environmental conditions such as wind, rain, or small wildlife activity would cause excessive nuisance alarms with a single-beam device. The unit ships as a single set with a quantity of one per unit of measure.

Key Features

• Quad beam detection requires multiple simultaneous beam breaks to trigger an alarm, reducing nuisance trips
• Designed for outdoor installation in exposed perimeter environments
• Photoelectric infrared beam technology provides reliable through-beam detection
• Appropriate for fence line, driveway, and building perimeter applications
• Sold as a single unit set (transmitter and receiver pair)

Compatibility

Designed as an OEM-style outdoor quad photoelectric beam detector for use with standard perimeter security and intrusion detection control systems that accept dry contact or relay outputs typical of this product category.

Installation Notes

Installation should be performed by a licensed low-voltage security technician familiar with perimeter detection systems. Before beginning installation, de-energize all connected control panel circuits and follow applicable local codes and NEC low-voltage wiring requirements. Transmitter and receiver heads must be mounted in precise optical alignment on stable posts or surfaces to maintain beam integrity. Avoid mounting locations subject to direct sunlight interference or severe vibration without appropriate shielding or isolation measures.