The Viewguard PIR detectors are motion detectors using passive infrared technology. To ensure optimum detection, detectors are equipped with high-quality mirror optics. Standard equipment includes a mirror area for optics. If required, the detectors can be retro-fitted to long-range or curtain optics with accessories that are available separately. The detectors are suitable for intruder alarm panels with conventional technology and are available with or without Anit-Mask function (monitoring against covering). Range: 15m x 15m (Selectable to 15, 13, 11 & 8m). Micro processor controlled. Current 6.6 mA @ 12VDC. Infrared light guide antimasking. Memory. Operating temperature: -10°C to 55°C. Tamper switch. Dimensions (h x w x d): 158 x 64 x 48mm. EN50131-1 Security Grade 3, Environmental Class II.