Alarm Systems Motion Detectors: We install Tri-Tech motion sensors made by reputable companies such as BOSCH and LuNAR who are second to none in durable and reliable protection. The BOSCH Tri-Tech motion sensors use three different sensors that must agree on specific movement and heat for any alarm to occur. This helps reduce false alarms. The BOSCH DS835 is a microprocessor based Tri-Tech Passive Infrared / Microwave Intrusion Detector which provides immunity to false alarms caused by pets (a dog up to 100 pounds or 10 cats). The patented Passive Infrared and Microwave processing has excellent catch performance with the freedom from false alarms. The LuNAR ceiling mount Series offers the ideal solution for areas where wall and corner mounting is not possible. The LuNAR ceiling mount detectors are very useful in rooms where wall placement would cause detectors to be blocked by shelves, closets, or storage areas. Combining sophisticated detection capabilities with a slim, attractive design, these advanced detectors employ a special 110 degree wide-angle spherical "Fresnel" lens that provides full 360 degree coverage. Ideal for commercial and residential environments. Visonic SPY Infrared Motion Detector 35' range SPY is the smallest PIR (passive inferred) detector available, and is suitable for any application where unobtrusive detection is required. This device features superior RF protection, pulse counter, miniature size - 19 x 70 mm (3/4 x 2-3/4 in), and flush mounts into a 22 mm (7/8 in) hole.     Alarm System Components Door and Window Contacts Motion Detectors Smoke Detectors