Aritech motion sensors have the most advanced and sophisticated optics in the security industry. The EV1012 is a powerful 16m volumetric PIRs that feature the latest optical mirror technology of the 1000 series. To increase detection coverage, the 1000 series sensors use the 3Brid orthogonal curtain design. This is a horizontal mirror structure that produces curtains with vertical orientation to detect infrared. This orthogonal invention is the key in adding curtains to the mirror without sacrificing signal strength, nor increasing the size of the sensor. The EV1012 produces 1 continuous curtains at 25m distance.