Ceiling mounted passive infrared intruder detector
AP669 GE Interlogix Video surveillance

The AP669 series ceiling-mount sensors with Dual Optic Technology incorporate two independent pyros, two separate custom integrated circuits, and two 180-degree mirror segments that provide two independent fields of view. This design yields 18 solid curtains and increases the sensor’s overall volume of coverage, while the two mirrors provide additional flexibility by enabling one mirror segment to be shunted.

The sensor uses patented 4D signal processing technology to evaluate whether the size, speed, shape, and duration of an incoming signal match that generated by a human. This technology automatically adapts its alarm threshold when faced with environmental disturbances for fewer false alarms.