OPTEX AX70 wired outdoor active infra red dual beam, 20m. Accurate point to point perimeter protection.
 
Features
 
Infrared beam interruption detection
Interruption period - variable between 50, 100, 250, 500msec (4 steps)
99% beam blocking stability
4 Selectable beam frequencies
High grade aspherical lens
 
862-01-AX-70TNC