Passive infrared technology has been the gold standard for motion sensors for over 20 years, detecting movement by sensing body heat. Qolsys has added its proprietary S-Line sensor technology, creating a secure, encrypted wireless connection to the panel. It is triggered when a person or animal enters an area within its 30-foot range. It can be set to ignore animals smaller than 40 lbs., drastically reducing the chance of a false alarm caused by a pet.
Get started with your QS1231-840 Motion Detector.
Learn how to connect the QS1231-840 Motion Detector to the IQ Panel 2 with this step-by-step guide.
View instructions for replacing your motion detector's batteries.
Learn how to fix a QS1231-840 Motion Detector error.
View instructions for resolving a sensor malfunction.