A Visonic Alarm can be fitted with a Pet-tolerant Digital PIR Detector. This means that you can still protect your home even if you have a cat or dog and your four-legged friend can move about freely in the house without setting alarm bells ringing! Pet tolerant detectors are suitable for pets up to 38kg. Visonic has developed and patented Target Specific Imaging optical system (TSI) and a unique pet identification software algorithm which means it can distinguish between pets weighing up to 38kg and a human body. Visonic’s technology offers the industry’s best detection accuracy. A Visonic home security alarm system is suitable for pet owners and offers reliability and false alarm immunity.