Check the listing for details. GE AP100PI Mirror Optic PIR Motion Sensor, With Pet Immunity. Condition: Open box. Listed at 15.99 USD. GE AP100PI Mirror Optic PIR Motion Sensor, With Pet Immunity This Motion Detector has been specifically designed to allow pets to move around the protected area while the system is armed. By combining custom designed mirror optics with an exclusive ASIC, the sensor provides peace of mind that property is perfectly protected without worry of false alarms from household pets. This Motion Detector has been specifically designed to allow pets to move around the protected area while the system is armed. By combining custom designed mirror optics with an exclusive ASIC, the sensor provides peace of mind that property is perfectly protected without worry of false alarms from household pets. It is designed to be immune to pets up to 44 pounds and has an adjustable PIR range for smaller rooms, making the detector even more stable, without compromising its excellent detection. Solid curtains of detection are also featured in the Motion Detector. Full under-crawl protection gives maximum security while the special characteristics of a curtain ensure not only better intruder detection but also better PIR stability. The Motion Detector is designed for easy installation. Features such as snap-in electronics allow rapid wiring, while the mirror optic curtains ensure easy installation and excellent detection every time.