Optex SL-350QFRI iSeries Advanced Outdoor Wireless Photoelectric Quad-Beam Detector, 350' Range

Protect long perimeters without trenching or hardwiring — the Optex SL-350QFRi advanced outdoor wireless photoelectric quad-beam detector is engineered for reliable perimeter security, surveillance, and monitoring where labor or conduit costs are a concern. This photoelectric beam detector provides up to 350' of detection range using a quad-beam configuration and a D.Q. circuit to reduce nuisance alarms, while four selectable channels maintain stable wireless performance in crowded RF environments. The SL-350QFRi ships with a pre-installed Inovonics EN1941 transmitter and four D-cell lithium batteries (expandable to eight) for multi-year, low-maintenance operation. Built to withstand outdoor conditions, the unit features an IP65-rated enclosure and triple-tamper protection for unattended deployments. Installers benefit from the Sniper viewfinder for fast alignment and compatibility with AX-TW200 towers for discreet, pole- or wall-mount mounting. Ideal for commercial, industrial, and critical-infrastructure perimeter protection, the SL-350QFRi reduces installation downtime and ongoing service calls. Specify the Optex SL-350QFRi for wireless perimeter projects — contact sales or request a quote to add resilient, low-maintenance detection to your security system.

• Eliminate trenching and AC power runs: battery-powered wireless design reduces installation time and labor for perimeter security projects.
• Reliable 350' quad-beam detection minimizes false alarms with D.Q. circuit and 4 selectable channels for stable surveillance performance.
• Pre-installed Inovonics EN1941 transmitter and D-cell batteries (4 included, expandable to 8) deliver years of low‑maintenance monitoring.
• IP65 weatherproof housing and triple-tamper protection ensure continuous outdoor operation in harsh environments.
• Quick alignment with Sniper viewfinder and compatibility with AX-TW200 beam towers enable clean, concealed wireless mounting.