For a household where you have furry friends as part of the family, there are several pet-friendly alarm systems to suit your unique situation. Installing such a system will spare you the inconvenience of false alarms triggered by your pet every now and again. Among the key highlights to know about pet-friendly home security systems are as follows. 1.    Different PIR Sensor Configurations The passive infra-red (PIR) detectors in standard alarm systems are so designed to check for any differences in your space's thermal environment.