With 72 zones of perfectly engineered detection, FX-40 combines Multi-Focus Optics, Spherical Lens Design, and look down zones to create a 40'x40' wide angle detection pattern or, with optional lens, a 60'x6' multi-layered curtain pattern. With Temperature Compensation circuitry, sealed optics, 'ECO' Technology, adjustable pulse count, and its especially designed housing, FX-40 is the premium quality PIR detector which exceeds the requirements of virtually any application.