Monitor a segment of a perimeter up to 200' long in areas where cabling is inconvenient with the Optex SL-200TNRi Smart Line Battery-Powered Photoelectric Detector Beam Perimeter. The transmitter emits an invisible photoelectric beam that is picked up by the receiver. If anything walks between the two, breaking the beam, it can act as a trigger for your alarm system.

\r\n\r\nThis set features a battery-powered transmitter and receiver. Batteries for the transmitter and receiver are included. The SL-200TNRi features an anti-frost design and is rated IP65 for safe outdoor use.