Bosch Security Systems

• This feature detects obstructions in the detector’s field of view. Obstructions include an object placed within 30 cm (1 ft) of the detector, or infrared blocking material placed or sprayed on the detector lens surface. When anti-mask detects a masking attempt, the detector activates the alarm and trouble outputs, and by an LED 3 flash pattern. The anti-mask notification occurs after 30 seconds of continuous blocking (masking).