The alarm book : a guide to burglar and fire alarms

A successful alarm system can yield years of uninterrupted business operation and a sense of security at home, while an unsuccessful system will lead to aggravation, worry, and financial loss. The central station, through which an alarm company operates the systems of all its clients, should be approved by the Underwriters Laboratories (UL). This book describes basic burglar alarm protection and outlines the factors to consider when balancing protection in a system with its cost. Common types of sensing devices include mechanical contact, damage-induced circuit interruption, interruption of light beams, reflected energy, infrared radiation, and capacitance. Special trip points, vaults, and safes are also key to a comprehensive security system. The book covers holdup alarm systems, transmitting devices and connecting lines, non-supervised systems versus supervised systems, and UL certification. Manual alarm stations, automatic fire alarm systems, and water sprinkler supervisory systems monitor fire, hazard, and water flow. Elements of the full home alarm system are described as well as installation of home alarms and cost. Steps for buying an alarm include consulting a checklist of practical steps, avoiding costly mistakes, and understanding the contract with the alarm company. Another chapter discusses the mechanics of using a home alarm system. Antiquated equipment, manufacturers defects, procedural failures, overcomplication of alarms, and damaged equipment are some of the problems often encountered by homeowners with their alarm systems. 2 appendixes A guide to professional alarm services. When you purchase an electronic alarm system, you are making an investment. Like any other investment, your alarm system can yield a return or it can waste your money, depending on the decisions you make. This book helps the reader to make the right decision.