Since 1970, Protective Systems Inc. of Seattle has been serving families, businesses and commercial facilities with security and fire systems and custom electronics. In addition to a full range of residential and commercial security/fire protection systems, PSI offers a full range of monitoring services to protect your home or business. Protective Systems Inc. is an authorized dealer for First Alert Professional, a Honeywell Company. First Alert is an elite network of independently owned security dealers. That means you get the “hands on” personal care of an independent business, backed up by the innovation and solid proficiency of First Alert and Honeywell, a Fortune 100 Company. PSI is also one of the few companies that can not only install, monitor and maintain the system - we are also licensed to perform commercial fire/sprinkler inspections.