Can pets trigger my Motion Sensor? Follow The Motion Sensors are pet-friendly up to 40 lbs. You should still ensure a pet under 40 lbs cannot climb on an elevated surface or false alarms may still occur. For assistance with false alarms, please contact Customer Care. Facebook Twitter LinkedIn Comments 0 comments Article is closed for comments. Articles in this section How do I mount my Motion Sensor? How does the Motion Sensor detect motion? Can I drill my Motion Sensor into the wall? Can pets trigger my Motion Sensor? What happens if the Motion Sensor sees motion while the system is armed? How is the Motion Sensor armed?